- Prevent spurious KCOV coverage in common_interrupt()
- Fixup the KCOV Makefile directive which got stale due to a source file
rename
- Exclude stack unwinding from KCOV as it creates large amounts of
uninteresting coverage
- Provide a self test to validate that KCOV coverage of the interrupt
handling code starts not before preempt count got updated.
-----BEGIN PGP SIGNATURE-----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=tiXT
-----END PGP SIGNATURE-----
Merge tag 'x86-build-2024-09-17' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 build updates from Thomas Gleixner:
"Updates for KCOV instrumentation on x86:
- Prevent spurious KCOV coverage in common_interrupt()
- Fixup the KCOV Makefile directive which got stale due to a source
file rename
- Exclude stack unwinding from KCOV as it creates large amounts of
uninteresting coverage
- Provide a self test to validate that KCOV coverage of the interrupt
handling code starts not before preempt count got updated"
* tag 'x86-build-2024-09-17' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86: Ignore stack unwinding in KCOV
module: Fix KCOV-ignored file name
kcov: Add interrupt handling self test
x86/entry: Remove unwanted instrumentation in common_interrupt()
Increase the test coverage of list_test_list_replace*() by adding the
checks to compare the pointer of "a_new.next" and "a_new.prev" to make
sure a perfect circular doubly linked list is formed after the
replacement.
Link: https://lkml.kernel.org/r/20240910040818.65723-1-richard120310@gmail.com
Signed-off-by: I Hsin Cheng <richard120310@gmail.com>
Cc: David Gow <davidgow@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Fix test for list_cut_position*() for the missing check of integer "i"
after the second loop. The variable should be checked for second time to
make sure both lists after the cut operation are formed as expected.
Link: https://lkml.kernel.org/r/20240910043531.71343-1-richard120310@gmail.com
Signed-off-by: I Hsin Cheng <richard120310@gmail.com>
Cc: David Gow <davidgow@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Patch series "resource: Fix region_intersects() vs
add_memory_driver_managed()", v3.
The patchset fixes a bug of region_intersects() for systems with CXL
memory. The details of the bug can be found in [1/3]. To avoid similar
bugs in the future. A kunit test case for region_intersects() is added in
[3/3]. [2/3] is a preparation patch for [3/3].
This patch (of 3):
region_intersects() is important because it's used for /dev/mem permission
checking. To avoid possible bug of region_intersects() in the future, a
kunit test case for region_intersects() is added.
Link: https://lkml.kernel.org/r/20240906030713.204292-1-ying.huang@intel.com
Link: https://lkml.kernel.org/r/20240906030713.204292-4-ying.huang@intel.com
Signed-off-by: "Huang, Ying" <ying.huang@intel.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: Davidlohr Bueso <dave@stgolabs.net>
Cc: Jonathan Cameron <jonathan.cameron@huawei.com>
Cc: Dave Jiang <dave.jiang@intel.com>
Cc: Alison Schofield <alison.schofield@intel.com>
Cc: Vishal Verma <vishal.l.verma@intel.com>
Cc: Ira Weiny <ira.weiny@intel.com>
Cc: Alistair Popple <apopple@nvidia.com>
Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Baoquan He <bhe@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
- Use the threshold to check for the pool refill condition and not the
run time recorded all time low fill value, which is lower than the
threshold and therefore causes refills to be delayed.
- KCSAN annotation updates and simplification of the fill_pool() code.
-----BEGIN PGP SIGNATURE-----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=B0II
-----END PGP SIGNATURE-----
Merge tag 'core-debugobjects-2024-09-16' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull debugobjects updates from Thomas Gleixner:
- Use the threshold to check for the pool refill condition and not the
run time recorded all time low fill value, which is lower than the
threshold and therefore causes refills to be delayed.
- KCSAN annotation updates and simplification of the fill_pool() code.
* tag 'core-debugobjects-2024-09-16' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
debugobjects: Remove redundant checks in fill_pool()
debugobjects: Fix conditions in fill_pool()
debugobjects: Fix the compilation attributes of some global variables
- Core:
- Overhaul of posix-timers in preparation of removing the
workaround for periodic timers which have signal delivery
ignored.
- Remove the historical extra jiffie in msleep()
msleep() adds an extra jiffie to the timeout value to ensure
minimal sleep time. The timer wheel ensures minimal sleep
time since the large rewrite to a non-cascading wheel, but the
extra jiffie in msleep() remained unnoticed. Remove it.
- Make the timer slack handling correct for realtime tasks.
The procfs interface is inconsistent and does neither reflect
reality nor conforms to the man page. Show the correct 0 slack
for real time tasks and enforce it at the core level instead of
having inconsistent individual checks in various timer setup
functions.
- The usual set of updates and enhancements all over the place.
- Drivers:
- Allow the ACPI PM timer to be turned off during suspend
- No new drivers
- The usual updates and enhancements in various drivers
-----BEGIN PGP SIGNATURE-----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=jE0N
-----END PGP SIGNATURE-----
Merge tag 'timers-core-2024-09-16' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull timer updates from Thomas Gleixner:
"Core:
- Overhaul of posix-timers in preparation of removing the workaround
for periodic timers which have signal delivery ignored.
- Remove the historical extra jiffie in msleep()
msleep() adds an extra jiffie to the timeout value to ensure
minimal sleep time. The timer wheel ensures minimal sleep time
since the large rewrite to a non-cascading wheel, but the extra
jiffie in msleep() remained unnoticed. Remove it.
- Make the timer slack handling correct for realtime tasks.
The procfs interface is inconsistent and does neither reflect
reality nor conforms to the man page. Show the correct 0 slack for
real time tasks and enforce it at the core level instead of having
inconsistent individual checks in various timer setup functions.
- The usual set of updates and enhancements all over the place.
Drivers:
- Allow the ACPI PM timer to be turned off during suspend
- No new drivers
- The usual updates and enhancements in various drivers"
* tag 'timers-core-2024-09-16' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (43 commits)
ntp: Make sure RTC is synchronized when time goes backwards
treewide: Fix wrong singular form of jiffies in comments
cpu: Use already existing usleep_range()
timers: Rename next_expiry_recalc() to be unique
platform/x86:intel/pmc: Fix comment for the pmc_core_acpi_pm_timer_suspend_resume function
clocksource/drivers/jcore: Use request_percpu_irq()
clocksource/drivers/cadence-ttc: Add missing clk_disable_unprepare in ttc_setup_clockevent
clocksource/drivers/asm9260: Add missing clk_disable_unprepare in asm9260_timer_init
clocksource/drivers/qcom: Add missing iounmap() on errors in msm_dt_timer_init()
clocksource/drivers/ingenic: Use devm_clk_get_enabled() helpers
platform/x86:intel/pmc: Enable the ACPI PM Timer to be turned off when suspended
clocksource: acpi_pm: Add external callback for suspend/resume
clocksource/drivers/arm_arch_timer: Using for_each_available_child_of_node_scoped()
dt-bindings: timer: rockchip: Add rk3576 compatible
timers: Annotate possible non critical data race of next_expiry
timers: Remove historical extra jiffie for timeout in msleep()
hrtimer: Use and report correct timerslack values for realtime tasks
hrtimer: Annotate hrtimer_cpu_base_.*_expiry() for sparse.
timers: Add sparse annotation for timer_sync_wait_running().
signal: Replace BUG_ON()s
...
- Core:
- Remove a global lock in the affinity setting code
The lock protects a cpumask for intermediate results and the lock
causes a bottleneck on simultaneous start of multiple virtual
machines. Replace the lock and the static cpumask with a per CPU
cpumask which is nicely serialized by raw spinlock held when
executing this code.
- Provide support for giving a suffix to interrupt domain names.
That's required to support devices with subfunctions so that the
domain names are distinct even if they originate from the same
device node.
- The usual set of cleanups and enhancements all over the place
- Drivers:
- Support for longarch AVEC interrupt chip
- Refurbishment of the Armada driver so it can be extended for new
variants.
- The usual set of cleanups and enhancements all over the place
-----BEGIN PGP SIGNATURE-----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=JlJ2
-----END PGP SIGNATURE-----
Merge tag 'irq-core-2024-09-16' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull irq updates from Thomas Gleixner:
"Core:
- Remove a global lock in the affinity setting code
The lock protects a cpumask for intermediate results and the lock
causes a bottleneck on simultaneous start of multiple virtual
machines. Replace the lock and the static cpumask with a per CPU
cpumask which is nicely serialized by raw spinlock held when
executing this code.
- Provide support for giving a suffix to interrupt domain names.
That's required to support devices with subfunctions so that the
domain names are distinct even if they originate from the same
device node.
- The usual set of cleanups and enhancements all over the place
Drivers:
- Support for longarch AVEC interrupt chip
- Refurbishment of the Armada driver so it can be extended for new
variants.
- The usual set of cleanups and enhancements all over the place"
* tag 'irq-core-2024-09-16' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (73 commits)
genirq: Use cpumask_intersects()
genirq/cpuhotplug: Use cpumask_intersects()
irqchip/apple-aic: Only access system registers on SoCs which provide them
irqchip/apple-aic: Add a new "Global fast IPIs only" feature level
irqchip/apple-aic: Skip unnecessary enabling of use_fast_ipi
dt-bindings: apple,aic: Document A7-A11 compatibles
irqdomain: Use IS_ERR_OR_NULL() in irq_domain_trim_hierarchy()
genirq/msi: Use kmemdup_array() instead of kmemdup()
genirq/proc: Change the return value for set affinity permission error
genirq/proc: Use irq_move_pending() in show_irq_affinity()
genirq/proc: Correctly set file permissions for affinity control files
genirq: Get rid of global lock in irq_do_set_affinity()
genirq: Fix typo in struct comment
irqchip/loongarch-avec: Add AVEC irqchip support
irqchip/loongson-pch-msi: Prepare get_pch_msi_handle() for AVECINTC
irqchip/loongson-eiointc: Rename CPUHP_AP_IRQ_LOONGARCH_STARTING
LoongArch: Architectural preparation for AVEC irqchip
LoongArch: Move irqchip function prototypes to irq-loongson.h
irqchip/loongson-pch-msi: Switch to MSI parent domains
softirq: Remove unused 'action' parameter from action callback
...
-----BEGIN PGP SIGNATURE-----
iHUEABYKAB0WIQRAhzRXHqcMeLMyaSiRxhvAZXjcogUCZuQEvgAKCRCRxhvAZXjc
onQWAQD6IxAKPU0zom2FoWNilvSzPs7WglTtvddX9pu/lT1RNAD/YC/wOLW8mvAv
9oTAmigQDQQhEWdJA9RgLZBiw7k+DAw=
=zWFb
-----END PGP SIGNATURE-----
Merge tag 'vfs-6.12.netfs' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs
Pull netfs updates from Christian Brauner:
"This contains the work to improve read/write performance for the new
netfs library.
The main performance enhancing changes are:
- Define a structure, struct folio_queue, and a new iterator type,
ITER_FOLIOQ, to hold a buffer as a replacement for ITER_XARRAY. See
that patch for questions about naming and form.
ITER_FOLIOQ is provided as a replacement for ITER_XARRAY. The
problem with an xarray is that accessing it requires the use of a
lock (typically the RCU read lock) - and this means that we can't
supply iterate_and_advance() with a step function that might sleep
(crypto for example) without having to drop the lock between pages.
ITER_FOLIOQ is the iterator for a chain of folio_queue structs,
where each folio_queue holds a small list of folios. A folio_queue
struct is a simpler structure than xarray and is not subject to
concurrent manipulation by the VM. folio_queue is used rather than
a bvec[] as it can form lists of indefinite size, adding to one end
and removing from the other on the fly.
- Provide a copy_folio_from_iter() wrapper.
- Make cifs RDMA support ITER_FOLIOQ.
- Use folio queues in the write-side helpers instead of xarrays.
- Add a function to reset the iterator in a subrequest.
- Simplify the write-side helpers to use sheaves to skip gaps rather
than trying to work out where gaps are.
- In afs, make the read subrequests asynchronous, putting them into
work items to allow the next patch to do progressive
unlocking/reading.
- Overhaul the read-side helpers to improve performance.
- Fix the caching of a partial block at the end of a file.
- Allow a store to be cancelled.
Then some changes for cifs to make it use folio queues instead of
xarrays for crypto bufferage:
- Use raw iteration functions rather than manually coding iteration
when hashing data.
- Switch to using folio_queue for crypto buffers.
- Remove the xarray bits.
Make some adjustments to the /proc/fs/netfs/stats file such that:
- All the netfs stats lines begin 'Netfs:' but change this to
something a bit more useful.
- Add a couple of stats counters to track the numbers of skips and
waits on the per-inode writeback serialisation lock to make it
easier to check for this as a source of performance loss.
Miscellaneous work:
- Ensure that the sb_writers lock is taken around
vfs_{set,remove}xattr() in the cachefiles code.
- Reduce the number of conditional branches in netfs_perform_write().
- Move the CIFS_INO_MODIFIED_ATTR flag to the netfs_inode struct and
remove cifs_post_modify().
- Move the max_len/max_nr_segs members from netfs_io_subrequest to
netfs_io_request as they're only needed for one subreq at a time.
- Add an 'unknown' source value for tracing purposes.
- Remove NETFS_COPY_TO_CACHE as it's no longer used.
- Set the request work function up front at allocation time.
- Use bh-disabling spinlocks for rreq->lock as cachefiles completion
may be run from block-filesystem DIO completion in softirq context.
- Remove fs/netfs/io.c"
* tag 'vfs-6.12.netfs' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs: (25 commits)
docs: filesystems: corrected grammar of netfs page
cifs: Don't support ITER_XARRAY
cifs: Switch crypto buffer to use a folio_queue rather than an xarray
cifs: Use iterate_and_advance*() routines directly for hashing
netfs: Cancel dirty folios that have no storage destination
cachefiles, netfs: Fix write to partial block at EOF
netfs: Remove fs/netfs/io.c
netfs: Speed up buffered reading
afs: Make read subreqs async
netfs: Simplify the writeback code
netfs: Provide an iterator-reset function
netfs: Use new folio_queue data type and iterator instead of xarray iter
cifs: Provide the capability to extract from ITER_FOLIOQ to RDMA SGEs
iov_iter: Provide copy_folio_from_iter()
mm: Define struct folio_queue and ITER_FOLIOQ to handle a sequence of folios
netfs: Use bh-disabling spinlocks for rreq->lock
netfs: Set the request work function upon allocation
netfs: Remove NETFS_COPY_TO_CACHE
netfs: Reserve netfs_sreq_source 0 as unset/unknown
netfs: Move max_len/max_nr_segs from netfs_io_subrequest to netfs_io_stream
...
As described in commit 42d9b379e3 ("lib/Kconfig.debug: Allow BTF +
DWARF5 with pahole 1.21+"), the combination of CONFIG_DEBUG_INFO_BTF
and CONFIG_DEBUG_INFO_DWARF5 requires pahole 1.21+.
GCC 11+ and Clang 14+ default to DWARF 5 when the -g flag is passed.
For the same reason, the combination of CONFIG_DEBUG_INFO_BTF and
CONFIG_DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT is also likely to require
pahole 1.21+ these days. (At least, it is uncertain whether the actual
requirement is pahole 1.16+ or 1.21+.)
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Reviewed-by: Alan Maguire <alan.maguire@oracle.com>
Acked-by: Andrii Nakryiko <andrii@kernel.org>
Reviewed-by: Nathan Chancellor <nathan@kernel.org>
Link: https://lore.kernel.org/r/20240913173759.1316390-3-masahiroy@kernel.org
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
When DEBUG_INFO_DWARF5 is selected, pahole 1.21+ is required to enable
DEBUG_INFO_BTF.
When DEBUG_INFO_DWARF4 or DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT is selected,
DEBUG_INFO_BTF can be enabled without pahole installed, but a build error
will occur in scripts/link-vmlinux.sh:
LD .tmp_vmlinux1
BTF: .tmp_vmlinux1: pahole (pahole) is not available
Failed to generate BTF for vmlinux
Try to disable CONFIG_DEBUG_INFO_BTF
We did not guard DEBUG_INFO_BTF by PAHOLE_VERSION when previously
discussed [1].
However, commit 613fe16923 ("kbuild: Add CONFIG_PAHOLE_VERSION")
added CONFIG_PAHOLE_VERSION after all. Now several CONFIG options, as
well as the combination of DEBUG_INFO_BTF and DEBUG_INFO_DWARF5, are
guarded by PAHOLE_VERSION.
The remaining compile-time check in scripts/link-vmlinux.sh now appears
to be an awkward inconsistency.
This commit adopts Nathan's original work.
[1]: https://lore.kernel.org/lkml/20210111180609.713998-1-natechancellor@gmail.com/
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Reviewed-by: Alan Maguire <alan.maguire@oracle.com>
Acked-by: Andrii Nakryiko <andrii@kernel.org>
Reviewed-by: Nathan Chancellor <nathan@kernel.org>
Link: https://lore.kernel.org/r/20240913173759.1316390-2-masahiroy@kernel.org
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Depending on the architecture, building a 32-bit vDSO on a 64-bit kernel
is problematic when some system headers are included.
Minimise the amount of headers by moving needed items, such as
__{get,put}_unaligned_t, into dedicated common headers and in general
use more specific headers, similar to what was done in commit
8165b57bca ("linux/const.h: Extract common header for vDSO") and
commit 8c59ab839f ("lib/vdso: Enable common headers").
On some architectures this results in missing PAGE_SIZE, as was
described by commit 8b3843ae36 ("vdso/datapage: Quick fix - use
asm/page-def.h for ARM64"), so define this if necessary, in the same way
as done prior by commit cffaefd15a ("vdso: Use CONFIG_PAGE_SHIFT in
vdso/datapage.h").
Removing linux/time64.h leads to missing 'struct timespec64' in
x86's asm/pvclock.h. Add a forward declaration of that struct in
that file.
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
With the current implementation, __cvdso_getrandom_data() calls
memset() on certain architectures, which is unexpected in the VDSO.
Rather than providing a memset(), simply rewrite opaque data
initialization to avoid memset().
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Acked-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Same as for the gettimeofday CVDSO implementation, add c-getrandom-y to
ease the inclusion of lib/vdso/getrandom.c in architectures' VDSO
builds.
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Performing SMP atomic operations on u64 fails on powerpc32:
CC drivers/char/random.o
In file included from <command-line>:
drivers/char/random.c: In function 'crng_reseed':
././include/linux/compiler_types.h:510:45: error: call to '__compiletime_assert_391' declared with attribute error: Need native word sized stores/loads for atomicity.
510 | _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
| ^
././include/linux/compiler_types.h:491:25: note: in definition of macro '__compiletime_assert'
491 | prefix ## suffix(); \
| ^~~~~~
././include/linux/compiler_types.h:510:9: note: in expansion of macro '_compiletime_assert'
510 | _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
| ^~~~~~~~~~~~~~~~~~~
././include/linux/compiler_types.h:513:9: note: in expansion of macro 'compiletime_assert'
513 | compiletime_assert(__native_word(t), \
| ^~~~~~~~~~~~~~~~~~
./arch/powerpc/include/asm/barrier.h:74:9: note: in expansion of macro 'compiletime_assert_atomic_type'
74 | compiletime_assert_atomic_type(*p); \
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
./include/asm-generic/barrier.h:172:55: note: in expansion of macro '__smp_store_release'
172 | #define smp_store_release(p, v) do { kcsan_release(); __smp_store_release(p, v); } while (0)
| ^~~~~~~~~~~~~~~~~~~
drivers/char/random.c:286:9: note: in expansion of macro 'smp_store_release'
286 | smp_store_release(&__arch_get_k_vdso_rng_data()->generation, next_gen + 1);
| ^~~~~~~~~~~~~~~~~
The kernel-side generation counter in the random driver is handled as an
unsigned long, not as a u64, in base_crng and struct crng.
But on the vDSO side, it needs to be an u64, not just an unsigned long,
in order to support a 32-bit vDSO atop a 64-bit kernel.
On kernel side, however, it is an unsigned long, hence a 32-bit value on
32-bit architectures, so just cast it to unsigned long for the
smp_store_release(). A side effect is that on big endian architectures
the store will be performed in the upper 32 bits. It is not an issue on
its own because the vDSO site doesn't mind the value, as it only checks
differences. Just make sure that the vDSO side checks the full 64 bits.
For that, the local current_generation has to be u64 as well.
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Suggested-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Adds test suite for integer based power function which performs integer
exponentiation.
The test suite is designed to verify that the implementation of int_pow
correctly computes the power of a given base raised to a given exponent.
The tests check various scenarios and edge cases to ensure the accuracy
and reliability of the exponentiation function.
Updated commit with test information at commit time: Shuah Khan
Signed-off-by: Luis Felipe Hernandez <luis.hernandez093@gmail.com>
Reviewed-by: David Gow <davidgow@google.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
Define a data structure, struct folio_queue, to represent a sequence of
folios and a kernel-internal I/O iterator type, ITER_FOLIOQ, to allow a
list of folio_queue structures to be used to provide a buffer to
iov_iter-taking functions, such as sendmsg and recvmsg.
The folio_queue structure looks like:
struct folio_queue {
struct folio_batch vec;
u8 orders[PAGEVEC_SIZE];
struct folio_queue *next;
struct folio_queue *prev;
unsigned long marks;
unsigned long marks2;
};
It does not use a list_head so that next and/or prev can be set to NULL at
the ends of the list, allowing iov_iter-handling routines to determine that
they *are* the ends without needing to store a head pointer in the iov_iter
struct.
A folio_batch struct is used to hold the folio pointers which allows the
batch to be passed to batch handling functions. Two mark bits are
available per slot. The intention is to use at least one of them to mark
folios that need putting, but that might not be ultimately necessary.
Accessor functions are used to access the slots to do the masking and an
additional accessor function is used to indicate the size of the array.
The order of each folio is also stored in the structure to avoid the need
for iov_iter_advance() and iov_iter_revert() to have to query each folio to
find its size.
With careful barriering, this can be used as an extending buffer with new
folios inserted and new folio_queue structs added without the need for a
lock. Further, provided we always keep at least one struct in the buffer,
we can also remove consumed folios and consumed structs from the head end
as we without the need for locks.
[Questions/thoughts]
(1) To manage this, I need a head pointer, a tail pointer, a tail slot
number (assuming insertion happens at the tail end and the next
pointers point from head to tail). Should I put these into a struct
of their own, say "folio_queue_head" or "rolling_buffer"?
I will end up with two of these in netfs_io_request eventually, one
keeping track of the pagecache I'm dealing with for buffered I/O and
the other to hold a bounce buffer when we need one.
(2) Should I make the slots {folio,off,len} or bio_vec?
(3) This is intended to replace ITER_XARRAY eventually. Using an xarray
in I/O iteration requires the taking of the RCU read lock, doing
copying under the RCU read lock, walking the xarray (which may change
under us), handling retries and dealing with special values.
The advantage of ITER_XARRAY is that when we're dealing with the
pagecache directly, we don't need any allocation - but if we're doing
encrypted comms, there's a good chance we'd be using a bounce buffer
anyway.
This will require afs, erofs, cifs, orangefs and fscache to be
converted to not use this. afs still uses it for dirs and symlinks;
some of erofs usages should be easy to change, but there's one which
won't be so easy; ceph's use via fscache can be fixed by porting ceph
to netfslib; cifs is using xarray as a bounce buffer - that can be
moved to use sheaves instead; and orangefs has a similar problem to
erofs - maybe orangefs could use netfslib?
Signed-off-by: David Howells <dhowells@redhat.com>
cc: Matthew Wilcox <willy@infradead.org>
cc: Jeff Layton <jlayton@kernel.org>
cc: Steve French <sfrench@samba.org>
cc: Ilya Dryomov <idryomov@gmail.com>
cc: Gao Xiang <xiang@kernel.org>
cc: Mike Marshall <hubcap@omnibond.com>
cc: netfs@lists.linux.dev
cc: linux-fsdevel@vger.kernel.org
cc: linux-mm@kvack.org
cc: linux-afs@lists.infradead.org
cc: linux-cifs@vger.kernel.org
cc: ceph-devel@vger.kernel.org
cc: linux-erofs@lists.ozlabs.org
cc: devel@lists.orangefs.org
Link: https://lore.kernel.org/r/20240814203850.2240469-13-dhowells@redhat.com/ # v2
Signed-off-by: Christian Brauner <brauner@kernel.org>
With freader we don't need to restrict ourselves to a single page, so
let's allow ELF notes to be at any valid position with the file.
We also merge parse_build_id() and parse_build_id_buf() as now the only
difference between them is note offset overflow, which makes sense to
check in all situations.
Reviewed-by: Eduard Zingerman <eddyz87@gmail.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/r/20240829174232.3133883-8-andrii@kernel.org
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Extend freader with a flag specifying whether it's OK to cause page
fault to fetch file data that is not already physically present in
memory. With this, it's now easy to wait for data if the caller is
running in sleepable (faultable) context.
We utilize read_cache_folio() to bring the desired folio into page
cache, after which the rest of the logic works just the same at folio level.
Suggested-by: Omar Sandoval <osandov@fb.com>
Cc: Shakeel Butt <shakeel.butt@linux.dev>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Reviewed-by: Eduard Zingerman <eddyz87@gmail.com>
Reviewed-by: Shakeel Butt <shakeel.butt@linux.dev>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/r/20240829174232.3133883-7-andrii@kernel.org
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Make it clear that build_id_parse() assumes that it can take no page
fault by renaming it and current few users to build_id_parse_nofault().
Also add build_id_parse() stub which for now falls back to non-sleepable
implementation, but will be changed in subsequent patches to take
advantage of sleepable context. PROCMAP_QUERY ioctl() on
/proc/<pid>/maps file is using build_id_parse() and will automatically
take advantage of more reliable sleepable context implementation.
Reviewed-by: Eduard Zingerman <eddyz87@gmail.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/r/20240829174232.3133883-6-andrii@kernel.org
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Now that freader allows to access multiple pages transparently, there is
no need to limit program headers to the very first ELF file page. Remove
this limitation, but still put some sane limit on amount of program
headers that we are willing to iterate over (set arbitrarily to 256).
Reviewed-by: Eduard Zingerman <eddyz87@gmail.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/r/20240829174232.3133883-5-andrii@kernel.org
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Current code assumption is that program (segment) headers are following
ELF header immediately. This is a common case, but is not guaranteed. So
take into account e_phoff field of the ELF header when accessing program
headers.
Reviewed-by: Eduard Zingerman <eddyz87@gmail.com>
Reported-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/r/20240829174232.3133883-4-andrii@kernel.org
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Add freader abstraction that transparently manages fetching and local
mapping of the underlying file page(s) and provides a simple direct data
access interface.
freader_fetch() is the only and single interface necessary. It accepts
file offset and desired number of bytes that should be accessed, and
will return a kernel mapped pointer that caller can use to dereference
data up to requested size. Requested size can't be bigger than the size
of the extra buffer provided during initialization (because, worst case,
all requested data has to be copied into it, so it's better to flag
wrongly sized buffer unconditionally, regardless if requested data range
is crossing page boundaries or not).
If folio is not paged in, or some of the conditions are not satisfied,
NULL is returned and more detailed error code can be accessed through
freader->err field. This approach makes the usage of freader_fetch()
cleaner.
To accommodate accessing file data that crosses folio boundaries, user
has to provide an extra buffer that will be used to make a local copy,
if necessary. This is done to maintain a simple linear pointer data
access interface.
We switch existing build ID parsing logic to it, without changing or
lifting any of the existing constraints, yet. This will be done
separately.
Given existing code was written with the assumption that it's always
working with a single (first) page of the underlying ELF file, logic
passes direct pointers around, which doesn't really work well with
freader approach and would be limiting when removing the single page (folio)
limitation. So we adjust all the logic to work in terms of file offsets.
There is also a memory buffer-based version (freader_init_from_mem())
for cases when desired data is already available in kernel memory. This
is used for parsing vmlinux's own build ID note. In this mode assumption
is that provided data starts at "file offset" zero, which works great
when parsing ELF notes sections, as all the parsing logic is relative to
note section's start.
Reviewed-by: Eduard Zingerman <eddyz87@gmail.com>
Reviewed-by: Shakeel Butt <shakeel.butt@linux.dev>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/r/20240829174232.3133883-3-andrii@kernel.org
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Harden build ID parsing logic, adding explicit READ_ONCE() where it's
important to have a consistent value read and validated just once.
Also, as pointed out by Andi Kleen, we need to make sure that entire ELF
note is within a page bounds, so move the overflow check up and add an
extra note_size boundaries validation.
Fixes tag below points to the code that moved this code into
lib/buildid.c, and then subsequently was used in perf subsystem, making
this code exposed to perf_event_open() users in v5.12+.
Cc: stable@vger.kernel.org
Reviewed-by: Eduard Zingerman <eddyz87@gmail.com>
Reviewed-by: Jann Horn <jannh@google.com>
Suggested-by: Andi Kleen <ak@linux.intel.com>
Fixes: bd7525dacd ("bpf: Move stack_map_get_build_id into lib")
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/r/20240829174232.3133883-2-andrii@kernel.org
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Add null check for character class. Previously, an inverted character
class could result in a nul byte being matched and lead to the function
reading past the end of the inputted string.
Link: https://lkml.kernel.org/r/20240826155709.12383-1-swaminathanalok@gmail.com
Signed-off-by: Alok Swaminathan <swaminathanalok@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
People keep trying to remove three functions that are going to be used in
a feature that is being developed. Dropping the functions entirely may
end up with people trying to use the bit for other uses, as people have
tried in the past.
Adding __maybe_unused stops compilers complaining about the unused
functions so they can be silently optimised out of the compiled code and
people won't try to claim the bit for another use.
Link: https://lore.kernel.org/all/20230726080916.17454-2-zhangpeng.00@bytedance.com/
Link: https://lore.kernel.org/all/202408310728.S7EE59BN-lkp@intel.com/
Link: https://lkml.kernel.org/r/20240907021506.4018676-1-Liam.Howlett@oracle.com
Signed-off-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Reviewed-by: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Reviewed-by: Kuan-Wei Chiu <visitorckw@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
ZSTD_createCDict_advanced2() must ensure that
ZSTD_createCDict_advanced_internal() has successfully allocated cdict.
customMalloc() may be called under low memory condition and may be unable
to allocate workspace for cdict.
Link: https://lkml.kernel.org/r/20240902105656.1383858-4-senozhatsky@chromium.org
Signed-off-by: Sergey Senozhatsky <senozhatsky@chromium.org>
Cc: Nick Terrell <terrelln@fb.com>
Cc: Minchan Kim <minchan@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This symbol is needed to enable lz4hc dictionary support.
Link: https://lkml.kernel.org/r/20240902105656.1383858-3-senozhatsky@chromium.org
Signed-off-by: Sergey Senozhatsky <senozhatsky@chromium.org>
Cc: Nick Terrell <terrelln@fb.com>
Cc: Minchan Kim <minchan@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This patch tries to cleanup some function description:
* function name mismatch
* parameter name mismatch
* parameter all end up with ':'
* not prefix '*' if parameter is a pointer
There is still some missing description of parameters, I didn't add them
since I am not sure the exact meaning.
Link: https://lkml.kernel.org/r/20240830220400.2007-1-richard.weiyang@gmail.com
Signed-off-by: Wei Yang <richard.weiyang@gmail.com>
Reviewed-by: Liam R. Howlett <Liam.Howlett@Oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Just do what mt_dump_range64() does.
Dump the error message based on format.
Link: https://lkml.kernel.org/r/20240826012422.29935-2-richard.weiyang@gmail.com
Signed-off-by: Wei Yang <richard.weiyang@gmail.com>
Cc: Liam R. Howlett <Liam.Howlett@oracle.com>
Cc: Matthew Wilcox <willy@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
mt_dump_arange64() only applies to an entry whose type is maple_arange_64,
in which mte_is_leaf() must return false.
Since mte_is_leaf() here is always false, we can remove this condition
check.
Link: https://lkml.kernel.org/r/20240826012422.29935-1-richard.weiyang@gmail.com
Signed-off-by: Wei Yang <richard.weiyang@gmail.com>
Reviewed-by: Liam R. Howlett <Liam.Howlett@Oracle.com>
Cc: Matthew Wilcox <willy@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
fill_pool() checks locklessly at the beginning whether the pool has to be
refilled. After that it checks locklessly in a loop whether the free list
contains objects and repeats the refill check.
If both conditions are true, it acquires the pool lock and tries to move
objects from the free list to the pool repeating the same checks again.
There are two redundant issues with that:
1) The repeated check for the fill condition
2) The loop processing
The repeated check is pointless as it was just established that fill is
required. The condition has to be re-evaluated under the lock anyway.
The loop processing is not required either because there is practically
zero chance that a repeated attempt will succeed if the checks under the
lock terminate the moving of objects.
Remove the redundant check and replace the loop with a simple if condition.
[ tglx: Massaged change log ]
Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/all/20240904133944.2124-4-thunder.leizhen@huawei.com
fill_pool() uses 'obj_pool_min_free' to decide whether objects should be
handed back to the kmem cache. But 'obj_pool_min_free' records the lowest
historical value of the number of objects in the object pool and not the
minimum number of objects which should be kept in the pool.
Use 'debug_objects_pool_min_level' instead, which holds the minimum number
which was scaled to the number of CPUs at boot time.
[ tglx: Massage change log ]
Fixes: d26bf5056f ("debugobjects: Reduce number of pool_lock acquisitions in fill_pool()")
Fixes: 36c4ead6f6 ("debugobjects: Add global free list and the counter")
Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/all/20240904133944.2124-3-thunder.leizhen@huawei.com
1. Both debug_objects_pool_min_level and debug_objects_pool_size are
read-only after initialization, change attribute '__read_mostly' to
'__ro_after_init', and remove '__data_racy'.
2. Many global variables are read in the debug_stats_show() function, but
didn't mask KCSAN's detection. Add '__data_racy' for them.
Suggested-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/all/20240904133944.2124-2-thunder.leizhen@huawei.com
There are several comments all over the place, which uses a wrong singular
form of jiffies.
Replace 'jiffie' by 'jiffy'. No functional change.
Signed-off-by: Anna-Maria Behnsen <anna-maria@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> # m68k
Link: https://lore.kernel.org/all/20240904-devel-anna-maria-b4-timers-flseep-v1-3-e98760256370@linutronix.de
This kunit update for Linux 6.11-rc7 consist of one single fix to
a use-after-free bug resulting from kunit_driver_create() failing
to copy the driver name leaving it on the stack or freeing it.
-----BEGIN PGP SIGNATURE-----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=JRC5
-----END PGP SIGNATURE-----
Merge tag 'linux_kselftest-kunit-fixes-6.11-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest
Pull kunit fix fromShuah Khan:
"One single fix to a use-after-free bug resulting from
kunit_driver_create() failing to copy the driver name leaving it on
the stack or freeing it"
* tag 'linux_kselftest-kunit-fixes-6.11-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest:
kunit: Device wrappers should also manage driver name
Pull bpf/master to receive baebe9aaba ("bpf: allow passing struct
bpf_iter_<type> as kfunc arguments") and related changes in preparation for
the DSQ iterator patchset.
Signed-off-by: Tejun Heo <tj@kernel.org>
Patch series "Increase the number of bits available in page_type".
Kent wants more than 16 bits in page_type, so I resurrected this old patch
and expanded it a bit. It's a bit more efficient than our current scheme
(1 4-byte insn vs 3 insns of 13 bytes total) to test a single page type.
This patch (of 4):
An upcoming patch will convert page type from being a bitfield to a
single byte, so we will not be able to use %pG to print the page type
any more. The printing of the symbolic name will be restored in that
patch.
Link: https://lkml.kernel.org/r/20240821173914.2270383-1-willy@infradead.org
Link: https://lkml.kernel.org/r/20240821173914.2270383-2-willy@infradead.org
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Acked-by: David Hildenbrand <david@redhat.com>
Cc: Hyeonggon Yoo <42.hyeyoo@gmail.com>
Cc: Kent Overstreet <kent.overstreet@linux.dev>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
NETIF_F_LLTX can't be changed via Ethtool and is not a feature,
rather an attribute, very similar to IFF_NO_QUEUE (and hot).
Free one netdev_features_t bit and make it a "hot" private flag.
Signed-off-by: Alexander Lobakin <aleksander.lobakin@intel.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
debugfs_create_dir() returns error pointers. It never returns NULL. So
use IS_ERR() to check it.
Link: https://lkml.kernel.org/r/20240821073441.9701-1-11162571@vivo.com
Signed-off-by: Yang Ruibin <11162571@vivo.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
*-objs suffix is reserved rather for (user-space) host programs while
usually *-y suffix is used for kernel drivers (although *-objs works for
that purpose for now).
Let's correct the old usages of *-objs in Makefiles.
Link: https://lkml.kernel.org/r/20240821155140.611514-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Florian Fainelli <florian.fainelli@broadcom.com>
Reviewed-by: Alexander Lobakin <aleksander.lobakin@intel.com>
Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Cc: Tal Gilboa <talgi@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Add missing __percpu qualifier to a (void *) cast to fix
percpu_counter.c:212:36: warning: cast removes address space '__percpu' of expression
percpu_counter.c:212:33: warning: incorrect type in assignment (different address spaces)
percpu_counter.c:212:33: expected signed int [noderef] [usertype] __percpu *counters
percpu_counter.c:212:33: got void *
sparse warnings.
Found by GCC's named address space checks.
There were no changes in the resulting object file.
Link: https://lkml.kernel.org/r/20240814064437.940162-1-ubizjak@gmail.com
Signed-off-by: Uros Bizjak <ubizjak@gmail.com>
Cc: Dennis Zhou <dennis@kernel.org>
Cc: Tejun Heo <tj@kernel.org>
Cc: Christoph Lameter <cl@linux.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
The original _bin2bcd() function used / 10 and % 10 operations for
conversion. Although GCC optimizes these operations and does not generate
division or modulus instructions, the new implementation reduces the
number of mov instructions in the generated code for both x86-64 and ARM
architectures.
This optimization calculates the tens digit using (val * 103) >> 10, which
is accurate for values of 'val' in the range [0, 178]. Given that the
valid input range is [0, 99], this method ensures correctness while
simplifying the generated code.
Link: https://lkml.kernel.org/r/20240812170229.229380-1-visitorckw@gmail.com
Signed-off-by: Kuan-Wei Chiu <visitorckw@gmail.com>
Cc: Ching-Chun (Jim) Huang <jserv@ccns.ncku.edu.tw>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
The fault-inject.h users across the kernel need to add a lot of #ifdef
CONFIG_FAULT_INJECTION to cater for shortcomings in the header. Make
fault-inject.h self-contained for CONFIG_FAULT_INJECTION=n, and add stubs
for DECLARE_FAULT_ATTR(), setup_fault_attr(), should_fail_ex(), and
should_fail() to allow removal of conditional compilation.
[akpm@linux-foundation.org: repair fallout from no longer including debugfs.h into fault-inject.h]
[akpm@linux-foundation.org: fix drivers/misc/xilinx_tmr_inject.c]
[akpm@linux-foundation.org: Add debugfs.h inclusion to more files, per Stephen]
Link: https://lkml.kernel.org/r/20240813121237.2382534-1-jani.nikula@intel.com
Fixes: 6ff1cb355e ("[PATCH] fault-injection capabilities infrastructure")
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Cc: Akinobu Mita <akinobu.mita@gmail.com>
Cc: Abhinav Kumar <quic_abhinavk@quicinc.com>
Cc: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Cc: Himal Prasad Ghimiray <himal.prasad.ghimiray@intel.com>
Cc: Lucas De Marchi <lucas.demarchi@intel.com>
Cc: Rob Clark <robdclark@gmail.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Upon allocation failure, the current check with the nofail bits is
unnecessary, and further stands in the way of discouraging direct use of
__GFP_NOFAIL. Remove this and replace with the proper way of determining
if doing a non-blocking allocation for the nested table case.
Link: https://lkml.kernel.org/r/20240806153927.184515-1-dave@stgolabs.net
Signed-off-by: Davidlohr Bueso <dave@stgolabs.net>
Suggested-by: Michal Hocko <mhocko@suse.com>
Cc: Davidlohr Bueso <dave@stgolabs.net>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
CONFIG_LOCKDEP_CHAINS_BITS value decides the size of chain_hlocks[] in
kernel/locking/lockdep.c, and it is checked by add_chain_cache() with
BUILD_BUG_ON((1UL << 24) <= ARRAY_SIZE(chain_hlocks));
This patch is just to silence BUILD_BUG_ON().
See also https://lore.kernel.org/all/30795.1620913191@jrobl/
[cmllamas@google.com: fix minor checkpatch issues in commit log]
Link: https://lkml.kernel.org/r/20240723164018.2489615-1-cmllamas@google.com
Signed-off-by: J. R. Okajima <hooanon05g@gmail.com>
Signed-off-by: Carlos Llamas <cmllamas@google.com>
Acked-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Boqun Feng <boqun.feng@gmail.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Waiman Long <longman@redhat.com>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
There is a spelling mistake in a literal string and in cariable names.
Fix these.
Link: https://lkml.kernel.org/r/20240725093044.1742842-1-deshan@nfschina.com
Signed-off-by: Deshan Zhang <deshan@nfschina.com>
Cc: Christoph Böhmwalder <christoph.boehmwalder@linbit.com>
Cc: Lars Ellenberg <lars.ellenberg@linbit.com>
Cc: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
A single line break should be put into a sequence. Thus use the
corresponding function "seq_putc".
This issue was transformed by using the Coccinelle software.
Link: https://lkml.kernel.org/r/e7faa2c4-9590-44b4-8669-69ef810277b1@web.de
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Cc: Kent Overstreet <kent.overstreet@linux.dev>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Single characters should be put into a sequence. Thus use the
corresponding function "seq_putc".
This issue was transformed by using the Coccinelle software.
Link: https://lkml.kernel.org/r/375b5b4b-6295-419e-bae9-da724a7a682d@web.de
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Cc: Jason Baron <jbaron@akamai.com>
Cc: Jim Cromie <jim.cromie@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
XZ_EXTERN was used to make internal functions static in the preboot code.
However, in other decompressors this hasn't been done. On x86-64, this
makes no difference to the kernel image size.
Omit XZ_EXTERN and let some of the internal functions be extern in the
preboot code. Omitting XZ_EXTERN from include/linux/xz.h fixes warnings
in "make htmldocs" and makes the intradocument links to xz_dec functions
work in Documentation/staging/xz.rst. The alternative would have been to
add "XZ_EXTERN" to c_id_attributes in Documentation/conf.py but omitting
XZ_EXTERN seemed cleaner.
Link: https://lore.kernel.org/lkml/20240723205437.3c0664b0@kaneli/
Link: https://lkml.kernel.org/r/20240724110544.16430-1-lasse.collin@tukaani.org
Signed-off-by: Lasse Collin <lasse.collin@tukaani.org>
Tested-by: Michael Ellerman <mpe@ellerman.id.au> (powerpc)
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Sam James <sam@gentoo.org>
Cc: Albert Ou <aou@eecs.berkeley.edu>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Emil Renner Berthing <emil.renner.berthing@canonical.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: Joel Stanley <joel@jms.id.au>
Cc: Jubin Zhong <zhongjubin@huawei.com>
Cc: Jules Maselbas <jmaselbas@zdiv.net>
Cc: Krzysztof Kozlowski <krzk@kernel.org>
Cc: Palmer Dabbelt <palmer@dabbelt.com>
Cc: Paul Walmsley <paul.walmsley@sifive.com>
Cc: Randy Dunlap <rdunlap@infradead.org>
Cc: Rui Li <me@lirui.org>
Cc: Simon Glass <sjg@chromium.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Use LZMA2 options that match the arch-specific alignment of instructions.
This change reduces compressed kernel size 0-2 % depending on the arch.
On 1-byte-aligned x86 it makes no difference and on 4-byte-aligned archs
it helps the most.
Use the ARM-Thumb filter for ARM-Thumb2 kernels. This reduces compressed
kernel size about 5 %.[1] Previously such kernels were compressed using
the ARM filter which didn't do anything useful with ARM-Thumb2 code.
Add BCJ filter support for ARM64 and RISC-V. Compared to unfiltered XZ or
plain LZMA, the compressed kernel size is reduced about 5 % on ARM64 and 7
% on RISC-V. A new enough version of the xz tool is required: 5.4.0 for
ARM64 and 5.6.0 for RISC-V. With an old xz version, a message is printed
to standard error and the kernel is compressed without the filter.
Update lib/decompress_unxz.c to match the changes to xz_wrap.sh.
Update the CONFIG_KERNEL_XZ help text in init/Kconfig:
- Add the RISC-V and ARM64 filters.
- Clarify that the PowerPC filter is for big endian only.
- Omit IA-64.
Link: https://lore.kernel.org/lkml/1637379771-39449-1-git-send-email-zhongjubin@huawei.com/ [1]
Link: https://lkml.kernel.org/r/20240721133633.47721-15-lasse.collin@tukaani.org
Signed-off-by: Lasse Collin <lasse.collin@tukaani.org>
Reviewed-by: Sam James <sam@gentoo.org>
Cc: Simon Glass <sjg@chromium.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will@kernel.org>
Cc: Paul Walmsley <paul.walmsley@sifive.com>
Cc: Palmer Dabbelt <palmer@dabbelt.com>
Cc: Albert Ou <aou@eecs.berkeley.edu>
Cc: Jubin Zhong <zhongjubin@huawei.com>
Cc: Jules Maselbas <jmaselbas@zdiv.net>
Cc: Emil Renner Berthing <emil.renner.berthing@canonical.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: Joel Stanley <joel@jms.id.au>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Krzysztof Kozlowski <krzk@kernel.org>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Randy Dunlap <rdunlap@infradead.org>
Cc: Rui Li <me@lirui.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
A later commit updates lib/decompress_unxz.c to enable this filter for
kernel decompression. lib/decompress_unxz.c is already used if
CONFIG_EFI_ZBOOT=y && CONFIG_KERNEL_XZ=y.
This filter can be used by Squashfs without modifications to the Squashfs
kernel code (only needs support in userspace Squashfs-tools).
Link: https://lkml.kernel.org/r/20240721133633.47721-13-lasse.collin@tukaani.org
Signed-off-by: Lasse Collin <lasse.collin@tukaani.org>
Reviewed-by: Sam James <sam@gentoo.org>
Cc: Albert Ou <aou@eecs.berkeley.edu>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Emil Renner Berthing <emil.renner.berthing@canonical.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: Joel Stanley <joel@jms.id.au>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Jubin Zhong <zhongjubin@huawei.com>
Cc: Jules Maselbas <jmaselbas@zdiv.net>
Cc: Krzysztof Kozlowski <krzk@kernel.org>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Palmer Dabbelt <palmer@dabbelt.com>
Cc: Paul Walmsley <paul.walmsley@sifive.com>
Cc: Randy Dunlap <rdunlap@infradead.org>
Cc: Rui Li <me@lirui.org>
Cc: Simon Glass <sjg@chromium.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Also omit a duplicated check for XZ_DEC_ARM in xz_private.h.
A later commit updates lib/decompress_unxz.c to enable this filter for
kernel decompression. lib/decompress_unxz.c is already used if
CONFIG_EFI_ZBOOT=y && CONFIG_KERNEL_XZ=y.
This filter can be used by Squashfs without modifications to the Squashfs
kernel code (only needs support in userspace Squashfs-tools).
Link: https://lkml.kernel.org/r/20240721133633.47721-12-lasse.collin@tukaani.org
Signed-off-by: Lasse Collin <lasse.collin@tukaani.org>
Reviewed-by: Sam James <sam@gentoo.org>
Cc: Albert Ou <aou@eecs.berkeley.edu>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Emil Renner Berthing <emil.renner.berthing@canonical.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: Joel Stanley <joel@jms.id.au>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Jubin Zhong <zhongjubin@huawei.com>
Cc: Jules Maselbas <jmaselbas@zdiv.net>
Cc: Krzysztof Kozlowski <krzk@kernel.org>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Palmer Dabbelt <palmer@dabbelt.com>
Cc: Paul Walmsley <paul.walmsley@sifive.com>
Cc: Randy Dunlap <rdunlap@infradead.org>
Cc: Rui Li <me@lirui.org>
Cc: Simon Glass <sjg@chromium.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Compilers cannot optimize the addition "i + 4" away since theoretically it
could overflow.
Link: https://lkml.kernel.org/r/20240721133633.47721-11-lasse.collin@tukaani.org
Signed-off-by: Lasse Collin <lasse.collin@tukaani.org>
Reviewed-by: Sam James <sam@gentoo.org>
Cc: Albert Ou <aou@eecs.berkeley.edu>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Emil Renner Berthing <emil.renner.berthing@canonical.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: Joel Stanley <joel@jms.id.au>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Jubin Zhong <zhongjubin@huawei.com>
Cc: Jules Maselbas <jmaselbas@zdiv.net>
Cc: Krzysztof Kozlowski <krzk@kernel.org>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Palmer Dabbelt <palmer@dabbelt.com>
Cc: Paul Walmsley <paul.walmsley@sifive.com>
Cc: Randy Dunlap <rdunlap@infradead.org>
Cc: Rui Li <me@lirui.org>
Cc: Simon Glass <sjg@chromium.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
In 2018, a dependency on <linux/crc32poly.h> was added to avoid
duplicating the same constant in multiple files. Two months later it was
found to be a bad idea and the definition of CRC32_POLY_LE macro was moved
into xz_private.h to avoid including <linux/crc32poly.h>.
xz_private.h is a wrong place for it too. Revert back to the upstream
version which has the poly in xz_crc32_init() in xz_crc32.c.
Link: https://lkml.kernel.org/r/20240721133633.47721-10-lasse.collin@tukaani.org
Fixes: faa16bc404 ("lib: Use existing define with polynomial")
Fixes: 242cdad873 ("lib/xz: Put CRC32_POLY_LE in xz_private.h")
Signed-off-by: Lasse Collin <lasse.collin@tukaani.org>
Reviewed-by: Sam James <sam@gentoo.org>
Tested-by: Michael Ellerman <mpe@ellerman.id.au> (powerpc)
Cc: Krzysztof Kozlowski <krzk@kernel.org>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: Joel Stanley <joel@jms.id.au>
Cc: Albert Ou <aou@eecs.berkeley.edu>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Emil Renner Berthing <emil.renner.berthing@canonical.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Jubin Zhong <zhongjubin@huawei.com>
Cc: Jules Maselbas <jmaselbas@zdiv.net>
Cc: Palmer Dabbelt <palmer@dabbelt.com>
Cc: Paul Walmsley <paul.walmsley@sifive.com>
Cc: Randy Dunlap <rdunlap@infradead.org>
Cc: Rui Li <me@lirui.org>
Cc: Simon Glass <sjg@chromium.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
- Fix comments that were no longer in sync with the code below them.
- Fix language errors.
- Fix coding style.
Link: https://lkml.kernel.org/r/20240721133633.47721-5-lasse.collin@tukaani.org
Signed-off-by: Lasse Collin <lasse.collin@tukaani.org>
Reviewed-by: Sam James <sam@gentoo.org>
Cc: Albert Ou <aou@eecs.berkeley.edu>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Emil Renner Berthing <emil.renner.berthing@canonical.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: Joel Stanley <joel@jms.id.au>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Jubin Zhong <zhongjubin@huawei.com>
Cc: Jules Maselbas <jmaselbas@zdiv.net>
Cc: Krzysztof Kozlowski <krzk@kernel.org>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Palmer Dabbelt <palmer@dabbelt.com>
Cc: Paul Walmsley <paul.walmsley@sifive.com>
Cc: Randy Dunlap <rdunlap@infradead.org>
Cc: Rui Li <me@lirui.org>
Cc: Simon Glass <sjg@chromium.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Remove the public domain notices and add SPDX license identifiers.
Change MODULE_LICENSE from "GPL" to "Dual BSD/GPL" because 0BSD should
count as a BSD license variant here.
The switch to 0BSD was done in the upstream XZ Embedded project because
public domain has (real or perceived) legal issues in some jurisdictions.
Link: https://lkml.kernel.org/r/20240721133633.47721-4-lasse.collin@tukaani.org
Signed-off-by: Lasse Collin <lasse.collin@tukaani.org>
Reviewed-by: Sam James <sam@gentoo.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Albert Ou <aou@eecs.berkeley.edu>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Emil Renner Berthing <emil.renner.berthing@canonical.com>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: Joel Stanley <joel@jms.id.au>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Jubin Zhong <zhongjubin@huawei.com>
Cc: Jules Maselbas <jmaselbas@zdiv.net>
Cc: Krzysztof Kozlowski <krzk@kernel.org>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Palmer Dabbelt <palmer@dabbelt.com>
Cc: Paul Walmsley <paul.walmsley@sifive.com>
Cc: Randy Dunlap <rdunlap@infradead.org>
Cc: Rui Li <me@lirui.org>
Cc: Simon Glass <sjg@chromium.org>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This file produces large amounts of flaky coverage not useful for the
KCOV's intended use case (guiding the fuzzing process).
Link: https://lkml.kernel.org/r/20240722223726.194658-1-andrey.konovalov@linux.dev
Signed-off-by: Andrey Konovalov <andreyknvl@gmail.com>
Reviewed-by: Dmitry Vyukov <dvyukov@google.com>
Cc: Aleksandr Nogikh <nogikh@google.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Marco Elver <elver@google.com>
Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Cc: Yury Norov <yury.norov@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
make allmodconfig && make W=1 C=1 reports:
WARNING: modpost: missing MODULE_DESCRIPTION() in lib/test_objpool.o
Add the missing invocation of the MODULE_DESCRIPTION() macro.
Link: https://lkml.kernel.org/r/20240715-md-lib-test_objpool-v2-1-5a2b9369c37e@quicinc.com
Signed-off-by: Jeff Johnson <quic_jjohnson@quicinc.com>
Reviewed-by: Matt Wu <wuqiang.matt@bytedance.com>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Patch series "mul_u64_u64_div_u64: new implementation", v3.
This provides an implementation for mul_u64_u64_div_u64() that always
produces exact results.
This patch (of 2):
Library facilities must always return exact results. If the caller may be
contented with approximations then it should do the approximation on its
own.
In this particular case the comment in the code says "the algorithm
... below might lose some precision". Well, if you try it with e.g.:
a = 18446462598732840960
b = 18446462598732840960
c = 18446462598732840961
then the produced answer is 0 whereas the exact answer should be
18446462598732840959. This is _some_ precision lost indeed!
Let's reimplement this function so it always produces the exact result
regardless of its inputs while preserving existing fast paths when
possible.
Uwe said:
: My personal interest is to get the calculations in pwm drivers right.
: This function is used in several drivers below drivers/pwm/ . With the
: errors in mul_u64_u64_div_u64(), pwm consumers might not get the
: settings they request. Although I have to admit that I'm not aware it
: breaks real use cases (because typically the periods used are too short
: to make the involved multiplications overflow), but I pretty sure am
: not aware of all usages and it breaks testing.
:
: Another justification is commits like
: https://git.kernel.org/tip/77baa5bafcbe1b2a15ef9c37232c21279c95481c,
: where people start to work around the precision shortcomings of
: mul_u64_u64_div_u64().
Link: https://lkml.kernel.org/r/20240707190648.1982714-1-nico@fluxnic.net
Link: https://lkml.kernel.org/r/20240707190648.1982714-2-nico@fluxnic.net
Signed-off-by: Nicolas Pitre <npitre@baylibre.com>
Tested-by: Uwe Kleine-König <u.kleine-koenig@baylibre.com>
Reviewed-by: Uwe Kleine-König <u.kleine-koenig@baylibre.com>
Tested-by: Biju Das <biju.das.jz@bp.renesas.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
The return value of various write helper functions are not checked. We
can safely change the return type of these functions to be void.
Link: https://lkml.kernel.org/r/20240814161944.55347-18-sidhartha.kumar@oracle.com
Signed-off-by: Sidhartha Kumar <sidhartha.kumar@oracle.com>
Cc: Liam R. Howlett <Liam.Howlett@oracle.com>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Users of mas_store_prealloc() enter this function with nodes already
preallocated. This means the store type must be already set. We can then
remove the call to mas_wr_store_type() and initialize the write state to
continue the partial walk that was done when determining the store type.
Link: https://lkml.kernel.org/r/20240814161944.55347-17-sidhartha.kumar@oracle.com
Reviewed-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Signed-off-by: Sidhartha Kumar <sidhartha.kumar@oracle.com>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
These sanity checks are now redundant as they are already checked in
mas_wr_store_type(). We can remove them from mas_wr_append() and
mas_wr_node_store().
Link: https://lkml.kernel.org/r/20240814161944.55347-16-sidhartha.kumar@oracle.com
Signed-off-by: Sidhartha Kumar <sidhartha.kumar@oracle.com>
Cc: Liam R. Howlett <Liam.Howlett@oracle.com>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
These write helper functions are all called from store paths which
preallocate enough nodes that will be needed for the write. There is no
more need to allocate within the functions themselves.
Link: https://lkml.kernel.org/r/20240814161944.55347-15-sidhartha.kumar@oracle.com
Reviewed-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Signed-off-by: Sidhartha Kumar <sidhartha.kumar@oracle.com>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Not all users of mas_store() enter with nodes already preallocated.
Check for the MA_STATE_PREALLOC flag to decide whether to preallocate nodes
within mas_store() rather than relying on future write helper functions
to perform the allocations. This allows the write helper functions to be
simplified as they do not have to do checks to make sure there are
enough allocated nodes to perform the write.
Link: https://lkml.kernel.org/r/20240814161944.55347-14-sidhartha.kumar@oracle.com
Reviewed-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Signed-off-by: Sidhartha Kumar <sidhartha.kumar@oracle.com>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
There are no more users of the function, safely remove it.
Link: https://lkml.kernel.org/r/20240814161944.55347-13-sidhartha.kumar@oracle.com
Reviewed-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Signed-off-by: Sidhartha Kumar <sidhartha.kumar@oracle.com>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
The only callers of mas_commit_b_node() are those with store type of
wr_rebalance and wr_split_store. Use mas->store_type to dispatch to the
correct helper function. This allows the removal of mas_reuse_node() as
it is no longer used.
Link: https://lkml.kernel.org/r/20240814161944.55347-12-sidhartha.kumar@oracle.com
Signed-off-by: Sidhartha Kumar <sidhartha.kumar@oracle.com>
Cc: Liam R. Howlett <Liam.Howlett@oracle.com>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
By setting the store type in mas_insert(), we no longer need to use
mas_wr_modify() to determine the correct store function to use. Instead,
set the store type and call mas_wr_store_entry(). Also, pass in the
requested gfp flags to mas_insert() so they can be passed to the call to
mas_wr_preallocate().
Link: https://lkml.kernel.org/r/20240814161944.55347-11-sidhartha.kumar@oracle.com
Reviewed-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Signed-off-by: Sidhartha Kumar <sidhartha.kumar@oracle.com>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
When storing an entry, we can read the store type that was set from a
previous partial walk of the tree. Now that the type of store is known,
select the correct write helper function to use to complete the store.
Also noinline mas_wr_spanning_store() to limit stack frame usage in
mas_wr_store_entry() as it allocates a maple_big_node on the stack.
Link: https://lkml.kernel.org/r/20240814161944.55347-10-sidhartha.kumar@oracle.com
Reviewed-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Signed-off-by: Sidhartha Kumar <sidhartha.kumar@oracle.com>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Knowing the store type of the maple state could be helpful for debugging.
Have mas_dump() print mas->store_type.
Link: https://lkml.kernel.org/r/20240814161944.55347-9-sidhartha.kumar@oracle.com
Signed-off-by: Sidhartha Kumar <sidhartha.kumar@oracle.com>
Reviewed-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Refactor mtree_store_range() to use mas_store_gfp() which will abstract
the store, memory allocation, and error handling.
Link: https://lkml.kernel.org/r/20240814161944.55347-8-sidhartha.kumar@oracle.com
Signed-off-by: Sidhartha Kumar <sidhartha.kumar@oracle.com>
Reviewed-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Use mas_wr_preallocate() in mas_erase() to preallocate enough nodes to
complete the erase. Add error handling by skipping the store if the
preallocation lead to some error besides no memory.
Link: https://lkml.kernel.org/r/20240814161944.55347-7-sidhartha.kumar@oracle.com
Signed-off-by: Sidhartha Kumar <sidhartha.kumar@oracle.com>
Cc: Liam R. Howlett <Liam.Howlett@oracle.com>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Separate call to mas_destroy() from mas_nomem() so we can check for no
memory errors without destroying the current maple state in
mas_store_gfp(). We then add calls to mas_destroy() to callers of
mas_nomem().
Link: https://lkml.kernel.org/r/20240814161944.55347-6-sidhartha.kumar@oracle.com
Signed-off-by: Sidhartha Kumar <sidhartha.kumar@oracle.com>
Reviewed-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Introduce mas_wr_store_type() which will set the correct store type based
on a walk of the tree. In mas_wr_node_store() the <= min_slots condition
is changed to < as if new_end is = to mt_min_slots then there is not
enough room.
mas_prealloc_calc() is also introduced to abstract the calculation used to
determine the number of nodes needed for a store operation.
In this change a call to mas_reset() is removed in the error case of
mas_prealloc(). This is only needed in the MA_STATE_REBALANCE case of
mas_destroy(). We can move the call to mas_reset() directly to
mas_destroy().
Also, add a test case to validate the order that we check the store type
in is correct. This test models a vma expanding and then shrinking which
is part of the boot process.
Link: https://lkml.kernel.org/r/20240814161944.55347-5-sidhartha.kumar@oracle.com
Signed-off-by: Sidhartha Kumar <sidhartha.kumar@oracle.com>
Cc: Liam R. Howlett <Liam.Howlett@oracle.com>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Introduce a helper function, mas_wr_prealoc_setup(), that will set up a
maple write state in order to start a walk of a maple tree.
Link: https://lkml.kernel.org/r/20240814161944.55347-3-sidhartha.kumar@oracle.com
Signed-off-by: Sidhartha Kumar <sidhartha.kumar@oracle.com>
Cc: Liam R. Howlett <Liam.Howlett@oracle.com>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
In comment of function mas_start(), we list the return value of different
cases. According to the comment context, tell the maple_status here is
more consistent with others.
Let's correct it with ma_active in the case it's a tree.
Link: https://lkml.kernel.org/r/20240812150925.31551-2-richard.weiyang@gmail.com
Signed-off-by: Wei Yang <richard.weiyang@gmail.com>
Reviewed-by: Liam R. Howlett <Liam.Howlett@Oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
In comment of mas_start(), we lists the return value for different cases.
In case of a single entry, we set mas->status to ma_root, while the
comment uses mas_root, which is not a maple_status.
Fix the typo according to the code.
Link: https://lkml.kernel.org/r/20240812150925.31551-1-richard.weiyang@gmail.com
Signed-off-by: Wei Yang <richard.weiyang@gmail.com>
Reviewed-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Add new callback fields to the userspace implementation of struct
kmem_cache. This allows for executing callback functions in order to
further test low memory scenarios where node allocation is retried.
This callback can help test race conditions by calling a function when a
low memory event is tested.
Link: https://lkml.kernel.org/r/20240812190543.71967-2-sidhartha.kumar@oracle.com
Signed-off-by: Sidhartha Kumar <sidhartha.kumar@oracle.com>
Reviewed-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Cc: Matthew Wilcox <willy@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
The following scenario can result in a race condition:
Consider a node with the following indices and values
a<------->b<----------->c<--------->d
0xA NULL 0xB
CPU 1 CPU 2
--------- ---------
mas_set_range(a,b)
mas_erase()
-> range is expanded (a,c) because of null expansion
mas_nomem()
mas_unlock()
mas_store_range(b,c,0xC)
The node now looks like:
a<------->b<----------->c<--------->d
0xA 0xC 0xB
mas_lock()
mas_erase() <------ range of erase is still (a,c)
The node is now NULL from (a,c) but the write from CPU 2 should have been
retained and range (b,c) should still have 0xC as its value. We can fix
this by re-intializing to the original index and last. This does not need
a cc: Stable as there are no users of the maple tree which use internal
locking and this condition is only possible with internal locking.
Link: https://lkml.kernel.org/r/20240812190543.71967-1-sidhartha.kumar@oracle.com
Signed-off-by: Sidhartha Kumar <sidhartha.kumar@oracle.com>
Reviewed-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Cc: Matthew Wilcox <willy@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Use min() to simplify the dmirror_exclusive() function and improve its
readability.
Link: https://lkml.kernel.org/r/20240726131245.161695-1-thorsten.blum@toblux.com
Signed-off-by: Thorsten Blum <thorsten.blum@toblux.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Cc: Jérôme Glisse <jglisse@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Besides the obvious (and desired) difference between krealloc() and
kvrealloc(), there is some inconsistency in their function signatures and
behavior:
- krealloc() frees the memory when the requested size is zero, whereas
kvrealloc() simply returns a pointer to the existing allocation.
- krealloc() behaves like kmalloc() if a NULL pointer is passed, whereas
kvrealloc() does not accept a NULL pointer at all and, if passed,
would fault instead.
- krealloc() is self-contained, whereas kvrealloc() relies on the caller
to provide the size of the previous allocation.
Inconsistent behavior throughout allocation APIs is error prone, hence
make kvrealloc() behave like krealloc(), which seems superior in all
mentioned aspects.
Besides that, implementing kvrealloc() by making use of krealloc() and
vrealloc() provides oppertunities to grow (and shrink) allocations more
efficiently. For instance, vrealloc() can be optimized to allocate and
map additional pages to grow the allocation or unmap and free unused pages
to shrink the allocation.
[dakr@kernel.org: document concurrency restrictions]
Link: https://lkml.kernel.org/r/20240725125442.4957-1-dakr@kernel.org
[dakr@kernel.org: disable KASAN when switching to vmalloc]
Link: https://lkml.kernel.org/r/20240730185049.6244-2-dakr@kernel.org
[dakr@kernel.org: properly document __GFP_ZERO behavior]
Link: https://lkml.kernel.org/r/20240730185049.6244-5-dakr@kernel.org
Link: https://lkml.kernel.org/r/20240722163111.4766-3-dakr@kernel.org
Signed-off-by: Danilo Krummrich <dakr@kernel.org>
Acked-by: Michal Hocko <mhocko@suse.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Cc: Chandan Babu R <chandan.babu@oracle.com>
Cc: Christian König <christian.koenig@amd.com>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Christoph Lameter <cl@linux.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Hyeonggon Yoo <42.hyeyoo@gmail.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Kees Cook <kees@kernel.org>
Cc: Marc Zyngier <maz@kernel.org>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Miguel Ojeda <ojeda@kernel.org>
Cc: Oliver Upton <oliver.upton@linux.dev>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: Roman Gushchin <roman.gushchin@linux.dev>
Cc: Uladzislau Rezki <urezki@gmail.com>
Cc: Wedson Almeida Filho <wedsonaf@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
codetag_module_init() is used to initialize sections containing allocation
tags. This function is used to initialize module sections as well as core
kernel sections, in which case the module parameter is set to NULL. This
function has to be called even when CONFIG_MODULES=n to initialize core
kernel allocation tag sections. When CONFIG_MODULES=n, this function is a
NOP, which is wrong. This leads to /proc/allocinfo reported as empty.
Fix this by making it independent of CONFIG_MODULES.
Link: https://lkml.kernel.org/r/20240828231536.1770519-1-surenb@google.com
Fixes: 916cc5167c ("lib: code tagging framework")
Signed-off-by: Suren Baghdasaryan <surenb@google.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Kent Overstreet <kent.overstreet@linux.dev>
Cc: Pasha Tatashin <pasha.tatashin@soleen.com>
Cc: Sourav Panda <souravpanda@google.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: <stable@vger.kernel.org> [6.10+]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
-----BEGIN PGP SIGNATURE-----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=a3c1
-----END PGP SIGNATURE-----
Merge tag 'random-6.11-rc6-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/crng/random
Pull random number generator fix from Jason Donenfeld:
"Reject invalid flags passed to vgetrandom() in the same way that
getrandom() does, so that the behavior is the same, from Yann.
The flags argument to getrandom() only has a behavioral effect on the
function if the RNG isn't initialized yet, so vgetrandom() falls back
to the syscall in that case. But if the RNG is initialized, all of the
flags behave the same way, so vgetrandom() didn't bother checking
them, and just ignored them entirely.
But that doesn't account for invalid flags passed in, which need to be
rejected so we can use them later"
* tag 'random-6.11-rc6-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/crng/random:
random: vDSO: reject unknown getrandom() flags
This adds GENMASK_U128() tests although currently only 64 bit wide masks
are being tested.
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: linux-kernel@vger.kernel.org
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com>
Signed-off-by: Yury Norov <yury.norov@gmail.com>
Add a test that will create cache, allocate one object, kfree_rcu() it
and attempt to destroy it. As long as the usage of kvfree_rcu_barrier()
in kmem_cache_destroy() works correctly, there should be no warnings in
dmesg and the test should pass.
Additionally add a test_leak_destroy() test that leaks an object on
purpose and verifies that kmem_cache_destroy() catches it.
Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
kunit_driver_create() accepts a name for the driver, but does not copy
it, so if that name is either on the stack, or otherwise freed, we end
up with a use-after-free when the driver is cleaned up.
Instead, strdup() the name, and manage it as another KUnit allocation.
As there was no existing kunit_kstrdup(), we add one. Further, add a
kunit_ variant of strdup_const() and kfree_const(), so we don't need to
allocate and manage the string in the majority of cases where it's a
constant.
However, these are inline functions, and is_kernel_rodata() only works
for built-in code. This causes problems in two cases:
- If kunit is built as a module, __{start,end}_rodata is not defined.
- If a kunit test using these functions is built as a module, it will
suffer the same fate.
This fixes a KASAN splat with overflow.overflow_allocation_test, when
built as a module.
Restrict the is_kernel_rodata() case to when KUnit is built as a module,
which fixes the first case, at the cost of losing the optimisation.
Also, make kunit_{kstrdup,kfree}_const non-inline, so that other modules
using them will not accidentally depend on is_kernel_rodata(). If KUnit
is built-in, they'll benefit from the optimisation, if KUnit is not,
they won't, but the string will be properly duplicated.
Fixes: d03c720e03 ("kunit: Add APIs for managing devices")
Reported-by: Nico Pache <npache@redhat.com>
Closes: https://groups.google.com/g/kunit-dev/c/81V9b9QYON0
Reviewed-by: Kees Cook <kees@kernel.org>
Reviewed-by: Maxime Ripard <mripard@kernel.org>
Reviewed-by: Rae Moar <rmoar@google.com>
Signed-off-by: David Gow <davidgow@google.com>
Tested-by: Rae Moar <rmoar@google.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
Like the getrandom() syscall, vDSO getrandom() must also reject unknown
flags. [1]
It would be possible to return -EINVAL from vDSO itself, but in the
possible case that a new flag is added to getrandom() syscall in the
future, it would be easier to get the behavior from the syscall, instead
of erroring until the vDSO is extended to support the new flag or
explicitly falling back.
[1] Designing the API: Planning for Extension
https://docs.kernel.org/process/adding-syscalls.html#designing-the-api-planning-for-extension
Signed-off-by: Yann Droneaud <yann@droneaud.fr>
[Jason: reworded commit message]
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
When soft interrupt actions are called, they are passed a pointer to the
struct softirq action which contains the action's function pointer.
This pointer isn't useful, as the action callback already knows what
function it is. And since each callback handles a specific soft interrupt,
the callback also knows which soft interrupt number is running.
No soft interrupt action callback actually uses this parameter, so remove
it from the function pointer signature. This clarifies that soft interrupt
actions are global routines and makes it slightly cheaper to call them.
Signed-off-by: Caleb Sander Mateos <csander@purestorage.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Jens Axboe <axboe@kernel.dk>
Link: https://lore.kernel.org/all/20240815171549.3260003-1-csander@purestorage.com
The Spectre-v1 mitigations made "access_ok()" much more expensive, since
it has to serialize execution with the test for a valid user address.
All the normal user copy routines avoid this by just masking the user
address with a data-dependent mask instead, but the fast
"unsafe_user_read()" kind of patterms that were supposed to be a fast
case got slowed down.
This introduces a notion of using
src = masked_user_access_begin(src);
to do the user address sanity using a data-dependent mask instead of the
more traditional conditional
if (user_read_access_begin(src, len)) {
model.
This model only works for dense accesses that start at 'src' and on
architectures that have a guard region that is guaranteed to fault in
between the user space and the kernel space area.
With this, the user access doesn't need to be manually checked, because
a bad address is guaranteed to fault (by some architecture masking
trick: on x86-64 this involves just turning an invalid user address into
all ones, since we don't map the top of address space).
This only converts a couple of examples for now. Example x86-64 code
generation for loading two words from user space:
stac
mov %rax,%rcx
sar $0x3f,%rcx
or %rax,%rcx
mov (%rcx),%r13
mov 0x8(%rcx),%r14
clac
where all the error handling and -EFAULT is now purely handled out of
line by the exception path.
Of course, if the micro-architecture does badly at 'clac' and 'stac',
the above is still pitifully slow. But at least we did as well as we
could.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
- New on disk format version, bcachefs_metadata_version_disk_accounting_inum
This adds one more disk accounting counter, which counts disk usage and
number of extents per inode number. This lets us track fragmentation,
for implementing defragmentation later, and it also counts disk usage
per inode in all snapshots, which will be a useful thing to expose to
users.
- One performance issue we've observed is threads spinning when they
should be waiting for dirty keys in the key cache to be flushed by
journal reclaim, so we now have hysteresis for the waiting thread, as
well as improving the tracepoint and a new time_stat, for tracking time
blocked waiting on key cache flushing.
And, various assorted smaller fixes.
-----BEGIN PGP SIGNATURE-----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=BPGT
-----END PGP SIGNATURE-----
Merge tag 'bcachefs-2024-08-16' of git://evilpiepirate.org/bcachefs
Pull bcachefs fixes from Kent OverstreetL
- New on disk format version, bcachefs_metadata_version_disk_accounting_inum
This adds one more disk accounting counter, which counts disk usage
and number of extents per inode number. This lets us track
fragmentation, for implementing defragmentation later, and it also
counts disk usage per inode in all snapshots, which will be a useful
thing to expose to users.
- One performance issue we've observed is threads spinning when they
should be waiting for dirty keys in the key cache to be flushed by
journal reclaim, so we now have hysteresis for the waiting thread, as
well as improving the tracepoint and a new time_stat, for tracking
time blocked waiting on key cache flushing.
... and various assorted smaller fixes.
* tag 'bcachefs-2024-08-16' of git://evilpiepirate.org/bcachefs:
bcachefs: Fix locking in __bch2_trans_mark_dev_sb()
bcachefs: fix incorrect i_state usage
bcachefs: avoid overflowing LRU_TIME_BITS for cached data lru
bcachefs: Fix forgetting to pass trans to fsck_err()
bcachefs: Increase size of cuckoo hash table on too many rehashes
bcachefs: bcachefs_metadata_version_disk_accounting_inum
bcachefs: Kill __bch2_accounting_mem_mod()
bcachefs: Make bkey_fsck_err() a wrapper around fsck_err()
bcachefs: Fix warning in __bch2_fsck_err() for trans not passed in
bcachefs: Add a time_stat for blocked on key cache flush
bcachefs: Improve trans_blocked_journal_reclaim tracepoint
bcachefs: Add hysteresis to waiting on btree key cache flush
lib/generic-radix-tree.c: Fix rare race in __genradix_ptr_alloc()
bcachefs: Convert for_each_btree_node() to lockrestart_do()
bcachefs: Add missing downgrade table entry
bcachefs: disk accounting: ignore unknown types
bcachefs: bch2_accounting_invalid() fixup
bcachefs: Fix bch2_trigger_alloc when upgrading from old versions
bcachefs: delete faulty fastpath in bch2_btree_path_traverse_cached()
The remaining functions added by commit
a8ea8bdd9d did not check for memory
allocation errors. Add the checks and change the API to allow errors
to be returned.
Fixes: a8ea8bdd9d ("lib/mpi: Extend the MPI library")
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This partially reverts commit a8ea8bdd9d.
Most of it is no longer needed since sm2 has been removed. However,
the following functions have been kept as they have developed other
uses:
mpi_copy
mpi_mod
mpi_test_bit
mpi_set_bit
mpi_rshift
mpi_add
mpi_sub
mpi_addm
mpi_subm
mpi_mul
mpi_mulm
mpi_tdiv_r
mpi_fdiv_r
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
When @size is 0, the desired behavior is to allow unlimited bytes to be
parsed. Currently, this relies on some intentional arithmetic overflow
where --size gives us SIZE_MAX when size is 0.
Explicitly spell out the desired behavior without relying on intentional
overflow/underflow.
Signed-off-by: Justin Stitt <justinstitt@google.com>
Link: https://lore.kernel.org/r/20240808-b4-string_helpers_caa133-v1-1-686a455167c4@google.com
Signed-off-by: Kees Cook <kees@kernel.org>
After building with CONFIG_FORTIFY_SOURCE=y, many .*.d files are left
in lib/test_fortify/ because the compiler outputs header dependencies
into *.d without fixdep being invoked.
When compiling C files, if_changed_dep should be used so that the
auto-generated header dependencies are recorded in .*.cmd files.
Currently, if_changed is incorrectly used, and only two headers are
hard-coded in lib/Makefile.
In the previous patch version, the kbuild test robot detected new errors
on GCC 7.
GCC 7 or older does not produce test.d with the following test code:
$ echo 'void b(void) __attribute__((__error__(""))); void a(void) { b(); }' |
gcc -Wp,-MMD,test.d -c -o /dev/null -x c -
Perhaps, this was a bug that existed in older GCC versions.
Skip the tests for GCC<=7 for now, as this will be eventually solved
when we bump the minimal supported GCC version.
Link: https://lore.kernel.org/oe-kbuild-all/CAK7LNARmJcyyzL-jVJfBPi3W684LTDmuhMf1koF0TXoCpKTmcw@mail.gmail.com/T/#m13771bf78ae21adff22efc4d310c973fb4bcaf67
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Link: https://lore.kernel.org/r/20240727150302.1823750-4-masahiroy@kernel.org
Signed-off-by: Kees Cook <kees@kernel.org>
There are some issues in the test_fortify Makefile code.
Problem 1: cc-disable-warning invokes compiler dozens of times
To see how many times the cc-disable-warning is evaluated, change
this code:
$(call cc-disable-warning,fortify-source)
to:
$(call cc-disable-warning,$(shell touch /tmp/fortify-$$$$)fortify-source)
Then, build the kernel with CONFIG_FORTIFY_SOURCE=y. You will see a
large number of '/tmp/fortify-<PID>' files created:
$ ls -1 /tmp/fortify-* | wc
80 80 1600
This means the compiler was invoked 80 times just for checking the
-Wno-fortify-source flag support.
$(call cc-disable-warning,fortify-source) should be added to a simple
variable instead of a recursive variable.
Problem 2: do not recompile string.o when the test code is updated
The test cases are independent of the kernel. However, when the test
code is updated, $(obj)/string.o is rebuilt and vmlinux is relinked
due to this dependency:
$(obj)/string.o: $(obj)/$(TEST_FORTIFY_LOG)
always-y is suitable for building the log files.
Problem 3: redundant code
clean-files += $(addsuffix .o, $(TEST_FORTIFY_LOGS))
... is unneeded because the top Makefile globally cleans *.o files.
This commit fixes these issues and makes the code readable.
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Link: https://lore.kernel.org/r/20240727150302.1823750-2-masahiroy@kernel.org
Signed-off-by: Kees Cook <kees@kernel.org>
The 'device_name' array doesn't exist out of the
'overflow_allocation_test' function scope. However, it is being used as
a driver name when calling 'kunit_driver_create' from
'kunit_device_register'. It produces the kernel panic with KASAN
enabled.
Since this variable is used in one place only, remove it and pass the
device name into kunit_device_register directly as an ascii string.
Signed-off-by: Ivan Orlov <ivan.orlov0322@gmail.com>
Reviewed-by: David Gow <davidgow@google.com>
Link: https://lore.kernel.org/r/20240815000431.401869-1-ivan.orlov0322@gmail.com
Signed-off-by: Kees Cook <kees@kernel.org>
If a CSD-lock stall goes on long enough, it will cause an RCU CPU
stall warning. This additional warning provides much additional
console-log traffic and little additional information. Therefore,
provide a new csd_lock_is_stuck() function that returns true if there
is an ongoing CSD-lock stall. This function will be used by the RCU
CPU stall warnings to provide a one-line indication of the stall when
this function returns true.
[ neeraj.upadhyay: Apply Rik van Riel feedback. ]
[ neeraj.upadhyay: Apply kernel test robot feedback. ]
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Cc: Imran Khan <imran.f.khan@oracle.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Leonardo Bras <leobras@redhat.com>
Cc: "Peter Zijlstra (Intel)" <peterz@infradead.org>
Cc: Rik van Riel <riel@surriel.com>
Signed-off-by: Neeraj Upadhyay <neeraj.upadhyay@kernel.org>
If we need to increase the tree depth, allocate a new node, and then
race with another thread that increased the tree depth before us, we'll
still have a preallocated node that might be used later.
If we then use that node for a new non-root node, it'll still have a
pointer to the old root instead of being zeroed - fix this by zeroing it
in the cmpxchg failure path.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Add a boot self test that can catch sprious coverage from interrupts.
The coverage callback filters out interrupt code, but only after the
handler updates preempt count. Some code periodically leaks out
of that section and leads to spurious coverage.
Add a best-effort (but simple) test that is likely to catch such bugs.
If the test is enabled on CI systems that use KCOV, they should catch
any issues fast.
Signed-off-by: Dmitry Vyukov <dvyukov@google.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Alexander Potapenko <glider@google.com>
Reviewed-by: Marco Elver <elver@google.com>
Reviewed-by: Andrey Konovalov <andreyknvl@gmail.com>
Link: https://lore.kernel.org/all/7662127c97e29da1a748ad1c1539dd7b65b737b2.1718092070.git.dvyukov@google.com
Currently ARM64 extracts which specific sanitizer has caused a trap via
encoded data in the trap instruction. Clang on x86 currently encodes the
same data in the UD1 instruction but x86 handle_bug() and
is_valid_bugaddr() currently only look at UD2.
Bring x86 to parity with ARM64, similar to commit 25b84002af ("arm64:
Support Clang UBSAN trap codes for better reporting"). See the llvm
links for information about the code generation.
Enable the reporting of UBSAN sanitizer details on x86 compiled with clang
when CONFIG_UBSAN_TRAP=y by analysing UD1 and retrieving the type immediate
which is encoded by the compiler after the UD1.
[ tglx: Simplified it by moving the printk() into handle_bug() ]
Signed-off-by: Gatlin Newhouse <gatlin.newhouse@gmail.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/all/20240724000206.451425-1-gatlin.newhouse@gmail.com
Link: https://github.com/llvm/llvm-project/commit/c5978f42ec8e9#diff-bb68d7cd885f41cfc35843998b0f9f534adb60b415f647109e597ce448e92d9f
Link: https://github.com/llvm/llvm-project/blob/main/llvm/lib/Target/X86/X86InstrSystem.td#L27
This patch implements a union-find data structure in the kernel library,
which includes operations for allocating nodes, freeing nodes,
finding the root of a node, and merging two nodes.
Signed-off-by: Xavier <xavier_qy@163.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Introduce KUnit resource wrappers around platform_driver_register(),
platform_device_alloc(), and platform_device_add() so that test authors
can register platform drivers/devices from their tests and have the
drivers/devices automatically be unregistered when the test is done.
This makes test setup code simpler when a platform driver or platform
device is needed. Add a few test cases at the same time to make sure the
APIs work as intended.
Cc: Brendan Higgins <brendan.higgins@linux.dev>
Reviewed-by: David Gow <davidgow@google.com>
Cc: Rae Moar <rmoar@google.com>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: "Rafael J. Wysocki" <rafael@kernel.org>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
Link: https://lore.kernel.org/r/20240718210513.3801024-6-sboyd@kernel.org
We only had a couple of array[] declarations, and changing them to just
use 'MAX()' instead of 'max()' fixes the issue.
This will allow us to simplify our min/max macros enormously, since they
can now unconditionally use temporary variables to avoid using the
argument values multiple times.
Cc: David Laight <David.Laight@aculab.com>
Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This just standardizes the use of MIN() and MAX() macros, with the very
traditional semantics. The goal is to use these for C constant
expressions and for top-level / static initializers, and so be able to
simplify the min()/max() macros.
These macro names were used by various kernel code - they are very
traditional, after all - and all such users have been fixed up, with a
few different approaches:
- trivial duplicated macro definitions have been removed
Note that 'trivial' here means that it's obviously kernel code that
already included all the major kernel headers, and thus gets the new
generic MIN/MAX macros automatically.
- non-trivial duplicated macro definitions are guarded with #ifndef
This is the "yes, they define their own versions, but no, the include
situation is not entirely obvious, and maybe they don't get the
generic version automatically" case.
- strange use case #1
A couple of drivers decided that the way they want to describe their
versioning is with
#define MAJ 1
#define MIN 2
#define DRV_VERSION __stringify(MAJ) "." __stringify(MIN)
which adds zero value and I just did my Alexander the Great
impersonation, and rewrote that pointless Gordian knot as
#define DRV_VERSION "1.2"
instead.
- strange use case #2
A couple of drivers thought that it's a good idea to have a random
'MIN' or 'MAX' define for a value or index into a table, rather than
the traditional macro that takes arguments.
These values were re-written as C enum's instead. The new
function-line macros only expand when followed by an open
parenthesis, and thus don't clash with enum use.
Happily, there weren't really all that many of these cases, and a lot of
users already had the pattern of using '#ifndef' guarding (or in one
case just using '#undef MIN') before defining their own private version
that does the same thing. I left such cases alone.
Cc: David Laight <David.Laight@aculab.com>
Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
The highlight is the establishment of a minimum version for the Rust
toolchain, including 'rustc' (and bundled tools) and 'bindgen'.
The initial minimum will be the pinned version we currently have, i.e.
we are just widening the allowed versions. That covers 3 stable Rust
releases: 1.78.0, 1.79.0, 1.80.0 (getting released tomorrow), plus beta,
plus nightly.
This should already be enough for kernel developers in distributions
that provide recent Rust compiler versions routinely, such as Arch
Linux, Debian Unstable (outside the freeze period), Fedora Linux,
Gentoo Linux (especially the testing channel), Nix (unstable) and
openSUSE Slowroll and Tumbleweed.
In addition, the kernel is now being built-tested by Rust's pre-merge
CI. That is, every change that is attempting to land into the Rust
compiler is tested against the kernel, and it is merged only if it
passes. Similarly, the bindgen tool has agreed to build the kernel in
their CI too.
Thus, with the pre-merge CI in place, both projects hope to avoid
unintentional changes to Rust that break the kernel. This means that,
in general, apart from intentional changes on their side (that we
will need to workaround conditionally on our side), the upcoming Rust
compiler versions should generally work.
In addition, the Rust project has proposed getting the kernel into
stable Rust (at least solving the main blockers) as one of its three
flagship goals for 2024H2 [1].
I would like to thank Niko, Sid, Emilio et al. for their help promoting
the collaboration between Rust and the kernel.
[1] https://rust-lang.github.io/rust-project-goals/2024h2/index.html#flagship-goals
Toolchain and infrastructure:
- Support several Rust toolchain versions.
- Support several bindgen versions.
- Remove 'cargo' requirement and simplify 'rusttest', thanks to 'alloc'
having been dropped last cycle.
- Provide proper error reporting for the 'rust-analyzer' target.
'kernel' crate:
- Add 'uaccess' module with a safe userspace pointers abstraction.
- Add 'page' module with a 'struct page' abstraction.
- Support more complex generics in workqueue's 'impl_has_work!' macro.
'macros' crate:
- Add 'firmware' field support to the 'module!' macro.
- Improve 'module!' macro documentation.
Documentation:
- Provide instructions on what packages should be installed to build
the kernel in some popular Linux distributions.
- Introduce the new kernel.org LLVM+Rust toolchains.
- Explain '#[no_std]'.
And a few other small bits.
-----BEGIN PGP SIGNATURE-----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=8PYF
-----END PGP SIGNATURE-----
Merge tag 'rust-6.11' of https://github.com/Rust-for-Linux/linux
Pull Rust updates from Miguel Ojeda:
"The highlight is the establishment of a minimum version for the Rust
toolchain, including 'rustc' (and bundled tools) and 'bindgen'.
The initial minimum will be the pinned version we currently have, i.e.
we are just widening the allowed versions. That covers three stable
Rust releases: 1.78.0, 1.79.0, 1.80.0 (getting released tomorrow),
plus beta, plus nightly.
This should already be enough for kernel developers in distributions
that provide recent Rust compiler versions routinely, such as Arch
Linux, Debian Unstable (outside the freeze period), Fedora Linux,
Gentoo Linux (especially the testing channel), Nix (unstable) and
openSUSE Slowroll and Tumbleweed.
In addition, the kernel is now being built-tested by Rust's pre-merge
CI. That is, every change that is attempting to land into the Rust
compiler is tested against the kernel, and it is merged only if it
passes. Similarly, the bindgen tool has agreed to build the kernel in
their CI too.
Thus, with the pre-merge CI in place, both projects hope to avoid
unintentional changes to Rust that break the kernel. This means that,
in general, apart from intentional changes on their side (that we will
need to workaround conditionally on our side), the upcoming Rust
compiler versions should generally work.
In addition, the Rust project has proposed getting the kernel into
stable Rust (at least solving the main blockers) as one of its three
flagship goals for 2024H2 [1].
I would like to thank Niko, Sid, Emilio et al. for their help
promoting the collaboration between Rust and the kernel.
Toolchain and infrastructure:
- Support several Rust toolchain versions.
- Support several bindgen versions.
- Remove 'cargo' requirement and simplify 'rusttest', thanks to
'alloc' having been dropped last cycle.
- Provide proper error reporting for the 'rust-analyzer' target.
'kernel' crate:
- Add 'uaccess' module with a safe userspace pointers abstraction.
- Add 'page' module with a 'struct page' abstraction.
- Support more complex generics in workqueue's 'impl_has_work!'
macro.
'macros' crate:
- Add 'firmware' field support to the 'module!' macro.
- Improve 'module!' macro documentation.
Documentation:
- Provide instructions on what packages should be installed to build
the kernel in some popular Linux distributions.
- Introduce the new kernel.org LLVM+Rust toolchains.
- Explain '#[no_std]'.
And a few other small bits"
Link: https://rust-lang.github.io/rust-project-goals/2024h2/index.html#flagship-goals [1]
* tag 'rust-6.11' of https://github.com/Rust-for-Linux/linux: (26 commits)
docs: rust: quick-start: add section on Linux distributions
rust: warn about `bindgen` versions 0.66.0 and 0.66.1
rust: start supporting several `bindgen` versions
rust: work around `bindgen` 0.69.0 issue
rust: avoid assuming a particular `bindgen` build
rust: start supporting several compiler versions
rust: simplify Clippy warning flags set
rust: relax most deny-level lints to warnings
rust: allow `dead_code` for never constructed bindings
rust: init: simplify from `map_err` to `inspect_err`
rust: macros: indent list item in `paste!`'s docs
rust: add abstraction for `struct page`
rust: uaccess: add typed accessors for userspace pointers
uaccess: always export _copy_[from|to]_user with CONFIG_RUST
rust: uaccess: add userspace pointers
kbuild: rust-analyzer: improve comment documentation
kbuild: rust-analyzer: better error handling
docs: rust: no_std is used
rust: alloc: add __GFP_HIGHMEM flag
rust: alloc: fix typo in docs for GFP_NOWAIT
...
-----BEGIN PGP SIGNATURE-----
iHUEABYKAB0WIQTTMBEPP41GrTpTJgfdBJ7gKXxAjgUCZqQWWQAKCRDdBJ7gKXxA
jqJVAP9vU9HNzIyKDOOqoNHKMI+VzGn39w1FihWjG6AU5a+9NQD+MZJwr7bBwkpH
ii43HLUGvNRQtsldBZSRypsaitCSwAI=
=HGce
-----END PGP SIGNATURE-----
Merge tag 'mm-hotfixes-stable-2024-07-26-14-33' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
Pull misc hotfixes from Andrew Morton:
"11 hotfixes, 7 of which are cc:stable. 7 are MM, 4 are other"
* tag 'mm-hotfixes-stable-2024-07-26-14-33' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm:
nilfs2: handle inconsistent state in nilfs_btnode_create_block()
selftests/mm: skip test for non-LPA2 and non-LVA systems
mm/page_alloc: fix pcp->count race between drain_pages_zone() vs __rmqueue_pcplist()
mm: memcg: add cacheline padding after lruvec in mem_cgroup_per_node
alloc_tag: outline and export free_reserved_page()
decompress_bunzip2: fix rare decompression failure
mm/huge_memory: avoid PMD-size page cache if needed
mm: huge_memory: use !CONFIG_64BIT to relax huge page alignment on 32 bit machines
mm: fix old/young bit handling in the faulting path
dt-bindings: arm: update James Clark's email address
MAINTAINERS: mailmap: update James Clark's email address
The decompression code parses a huffman tree and counts the number of
symbols for a given bit length. In rare cases, there may be >= 256
symbols with a given bit length, causing the unsigned char to overflow.
This causes a decompression failure later when the code tries and fails to
find the bit length for a given symbol.
Since the maximum number of symbols is 258, use unsigned short instead.
Link: https://lkml.kernel.org/r/20240717162016.1514077-1-ross.lagerwall@citrix.com
Fixes: bc22c17e12 ("bzip2/lzma: library support for gzip, bzip2 and lzma decompression")
Signed-off-by: Ross Lagerwall <ross.lagerwall@citrix.com>
Cc: Alain Knaff <alain@knaff.lu>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Random fixes for v6.11.
-----BEGIN PGP SIGNATURE-----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=RbET
-----END PGP SIGNATURE-----
Merge tag 'bitmap-6.11-rc1' of https://github.com:/norov/linux
Pull bitmap updates from Yury Norov:
"Random fixes"
* tag 'bitmap-6.11-rc1' of https://github.com:/norov/linux:
riscv: Remove unnecessary int cast in variable_fls()
radix tree test suite: put definition of bitmap_clear() into lib/bitmap.c
bitops: Add a comment explaining the double underscore macros
lib: bitmap: add missing MODULE_DESCRIPTION() macros
cpumask: introduce assign_cpu() macro
-----BEGIN PGP SIGNATURE-----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=89Nl
-----END PGP SIGNATURE-----
Merge tag 'printk-for-6.11-trivial' of git://git.kernel.org/pub/scm/linux/kernel/git/printk/linux
Pull printk updates from Petr Mladek:
- trivial printk changes
The bigger "real" printk work is still being discussed.
* tag 'printk-for-6.11-trivial' of git://git.kernel.org/pub/scm/linux/kernel/git/printk/linux:
vsprintf: add missing MODULE_DESCRIPTION() macro
printk: Rename console_replay_all() and update context
Here is the big set of driver core changes for 6.11-rc1.
Lots of stuff in here, with not a huge diffstat, but apis are evolving
which required lots of files to be touched. Highlights of the changes
in here are:
- platform remove callback api final fixups (Uwe took many releases to
get here, finally!)
- Rust bindings for basic firmware apis and initial driver-core
interactions. It's not all that useful for a "write a whole driver
in rust" type of thing, but the firmware bindings do help out the
phy rust drivers, and the driver core bindings give a solid base on
which others can start their work. There is still a long way to go
here before we have a multitude of rust drivers being added, but
it's a great first step.
- driver core const api changes. This reached across all bus types,
and there are some fix-ups for some not-common bus types that
linux-next and 0-day testing shook out. This work is being done to
help make the rust bindings more safe, as well as the C code, moving
toward the end-goal of allowing us to put driver structures into
read-only memory. We aren't there yet, but are getting closer.
- minor devres cleanups and fixes found by code inspection
- arch_topology minor changes
- other minor driver core cleanups
All of these have been in linux-next for a very long time with no
reported problems.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-----BEGIN PGP SIGNATURE-----
iG0EABECAC0WIQT0tgzFv3jCIUoxPcsxR9QN2y37KQUCZqH+aQ8cZ3JlZ0Brcm9h
aC5jb20ACgkQMUfUDdst+ymoOQCfVBdLcBjEDAGh3L8qHRGMPy4rV2EAoL/r+zKm
cJEYtJpGtWX6aAtugm9E
=ZyJV
-----END PGP SIGNATURE-----
Merge tag 'driver-core-6.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core
Pull driver core updates from Greg KH:
"Here is the big set of driver core changes for 6.11-rc1.
Lots of stuff in here, with not a huge diffstat, but apis are evolving
which required lots of files to be touched. Highlights of the changes
in here are:
- platform remove callback api final fixups (Uwe took many releases
to get here, finally!)
- Rust bindings for basic firmware apis and initial driver-core
interactions.
It's not all that useful for a "write a whole driver in rust" type
of thing, but the firmware bindings do help out the phy rust
drivers, and the driver core bindings give a solid base on which
others can start their work.
There is still a long way to go here before we have a multitude of
rust drivers being added, but it's a great first step.
- driver core const api changes.
This reached across all bus types, and there are some fix-ups for
some not-common bus types that linux-next and 0-day testing shook
out.
This work is being done to help make the rust bindings more safe,
as well as the C code, moving toward the end-goal of allowing us to
put driver structures into read-only memory. We aren't there yet,
but are getting closer.
- minor devres cleanups and fixes found by code inspection
- arch_topology minor changes
- other minor driver core cleanups
All of these have been in linux-next for a very long time with no
reported problems"
* tag 'driver-core-6.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (55 commits)
ARM: sa1100: make match function take a const pointer
sysfs/cpu: Make crash_hotplug attribute world-readable
dio: Have dio_bus_match() callback take a const *
zorro: make match function take a const pointer
driver core: module: make module_[add|remove]_driver take a const *
driver core: make driver_find_device() take a const *
driver core: make driver_[create|remove]_file take a const *
firmware_loader: fix soundness issue in `request_internal`
firmware_loader: annotate doctests as `no_run`
devres: Correct code style for functions that return a pointer type
devres: Initialize an uninitialized struct member
devres: Fix memory leakage caused by driver API devm_free_percpu()
devres: Fix devm_krealloc() wasting memory
driver core: platform: Switch to use kmemdup_array()
driver core: have match() callback in struct bus_type take a const *
MAINTAINERS: add Rust device abstractions to DRIVER CORE
device: rust: improve safety comments
MAINTAINERS: add Danilo as FIRMWARE LOADER maintainer
MAINTAINERS: add Rust FW abstractions to FIRMWARE LOADER
firmware: rust: improve safety comments
...
-----BEGIN PGP SIGNATURE-----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=P8aI
-----END PGP SIGNATURE-----
Merge tag 'random-6.11-rc1-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/crng/random
Pull random number generator updates from Jason Donenfeld:
"This adds getrandom() support to the vDSO.
First, it adds a new kind of mapping to mmap(2), MAP_DROPPABLE, which
lets the kernel zero out pages anytime under memory pressure, which
enables allocating memory that never gets swapped to disk but also
doesn't count as being mlocked.
Then, the vDSO implementation of getrandom() is introduced in a
generic manner and hooked into random.c.
Next, this is implemented on x86. (Also, though it's not ready for
this pull, somebody has begun an arm64 implementation already)
Finally, two vDSO selftests are added.
There are also two housekeeping cleanup commits"
* tag 'random-6.11-rc1-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/crng/random:
MAINTAINERS: add random.h headers to RNG subsection
random: note that RNDGETPOOL was removed in 2.6.9-rc2
selftests/vDSO: add tests for vgetrandom
x86: vdso: Wire up getrandom() vDSO implementation
random: introduce generic vDSO getrandom() implementation
mm: add MAP_DROPPABLE for designating always lazily freeable mappings
-----BEGIN PGP SIGNATURE-----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=fqoV
-----END PGP SIGNATURE-----
Merge tag 'for-6.11/block-20240722' of git://git.kernel.dk/linux
Pull more block updates from Jens Axboe:
- MD fixes via Song:
- md-cluster fixes (Heming Zhao)
- raid1 fix (Mateusz Jończyk)
- s390/dasd module description (Jeff)
- Series cleaning up and hardening the blk-mq debugfs flag handling
(John, Christoph)
- blk-cgroup cleanup (Xiu)
- Error polled IO attempts if backend doesn't support it (hexue)
- Fix for an sbitmap hang (Yang)
* tag 'for-6.11/block-20240722' of git://git.kernel.dk/linux: (23 commits)
blk-cgroup: move congestion_count to struct blkcg
sbitmap: fix io hung due to race on sbitmap_word::cleared
block: avoid polling configuration errors
block: Catch possible entries missing from rqf_name[]
block: Simplify definition of RQF_NAME()
block: Use enum to define RQF_x bit indexes
block: Catch possible entries missing from cmd_flag_name[]
block: Catch possible entries missing from alloc_policy_name[]
block: Catch possible entries missing from hctx_flag_name[]
block: Catch possible entries missing from hctx_state_name[]
block: Catch possible entries missing from blk_queue_flag_name[]
block: Make QUEUE_FLAG_x as an enum
block: Relocate BLK_MQ_MAX_DEPTH
block: Relocate BLK_MQ_CPU_WORK_BATCH
block: remove QUEUE_FLAG_STOPPED
block: Add missing entry to hctx_flag_name[]
block: Add zone write plugging entry to rqf_name[]
block: Add missing entries from cmd_flag_name[]
s390/dasd: fix error checks in dasd_copy_pair_store()
s390/dasd: add missing MODULE_DESCRIPTION() macros
...
Kuan-Wei Chiu has significantly reworked the min_heap library code and
has taught bcachefs to use the new more generic implementation.
- Yury Norov's series "Cleanup cpumask.h inclusion in core headers"
reworks the cpumask and nodemask headers to make things generally more
rational.
- Kuan-Wei Chiu has sent along some maintenance work against our sorting
library code in the series "lib/sort: Optimizations and cleanups".
- More library maintainance work from Christophe Jaillet in the series
"Remove usage of the deprecated ida_simple_xx() API".
- Ryusuke Konishi continues with the nilfs2 fixes and clanups in the
series "nilfs2: eliminate the call to inode_attach_wb()".
- Kuan-Ying Lee has some fixes to the gdb scripts in the series "Fix GDB
command error".
- Plus the usual shower of singleton patches all over the place. Please
see the relevant changelogs for details.
-----BEGIN PGP SIGNATURE-----
iHUEABYKAB0WIQTTMBEPP41GrTpTJgfdBJ7gKXxAjgUCZp2GvwAKCRDdBJ7gKXxA
jlf/AP48xP5ilIHbtpAKm2z+MvGuTxJQ5VSC0UXFacuCbc93lAEA+Yo+vOVRmh6j
fQF2nVKyKLYfSz7yqmCyAaHWohIYLgg=
=Stxz
-----END PGP SIGNATURE-----
Merge tag 'mm-nonmm-stable-2024-07-21-15-07' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
Pull non-MM updates from Andrew Morton:
- In the series "treewide: Refactor heap related implementation",
Kuan-Wei Chiu has significantly reworked the min_heap library code
and has taught bcachefs to use the new more generic implementation.
- Yury Norov's series "Cleanup cpumask.h inclusion in core headers"
reworks the cpumask and nodemask headers to make things generally
more rational.
- Kuan-Wei Chiu has sent along some maintenance work against our
sorting library code in the series "lib/sort: Optimizations and
cleanups".
- More library maintainance work from Christophe Jaillet in the series
"Remove usage of the deprecated ida_simple_xx() API".
- Ryusuke Konishi continues with the nilfs2 fixes and clanups in the
series "nilfs2: eliminate the call to inode_attach_wb()".
- Kuan-Ying Lee has some fixes to the gdb scripts in the series "Fix
GDB command error".
- Plus the usual shower of singleton patches all over the place. Please
see the relevant changelogs for details.
* tag 'mm-nonmm-stable-2024-07-21-15-07' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (98 commits)
ia64: scrub ia64 from poison.h
watchdog/perf: properly initialize the turbo mode timestamp and rearm counter
tsacct: replace strncpy() with strscpy()
lib/bch.c: use swap() to improve code
test_bpf: convert comma to semicolon
init/modpost: conditionally check section mismatch to __meminit*
init: remove unused __MEMINIT* macros
nilfs2: Constify struct kobj_type
nilfs2: avoid undefined behavior in nilfs_cnt32_ge macro
math: rational: add missing MODULE_DESCRIPTION() macro
lib/zlib: add missing MODULE_DESCRIPTION() macro
fs: ufs: add MODULE_DESCRIPTION()
lib/rbtree.c: fix the example typo
ocfs2: add bounds checking to ocfs2_check_dir_entry()
fs: add kernel-doc comments to ocfs2_prepare_orphan_dir()
coredump: simplify zap_process()
selftests/fpu: add missing MODULE_DESCRIPTION() macro
compiler.h: simplify data_race() macro
build-id: require program headers to be right after ELF header
resource: add missing MODULE_DESCRIPTION()
...
walkers") is known to cause a performance regression
(https://lore.kernel.org/all/3acefad9-96e5-4681-8014-827d6be71c7a@linux.ibm.com/T/#mfa809800a7862fb5bdf834c6f71a3a5113eb83ff).
Yu has a fix which I'll send along later via the hotfixes branch.
- In the series "mm: Avoid possible overflows in dirty throttling" Jan
Kara addresses a couple of issues in the writeback throttling code.
These fixes are also targetted at -stable kernels.
- Ryusuke Konishi's series "nilfs2: fix potential issues related to
reserved inodes" does that. This should actually be in the
mm-nonmm-stable tree, along with the many other nilfs2 patches. My bad.
- More folio conversions from Kefeng Wang in the series "mm: convert to
folio_alloc_mpol()"
- Kemeng Shi has sent some cleanups to the writeback code in the series
"Add helper functions to remove repeated code and improve readability of
cgroup writeback"
- Kairui Song has made the swap code a little smaller and a little
faster in the series "mm/swap: clean up and optimize swap cache index".
- In the series "mm/memory: cleanly support zeropage in
vm_insert_page*(), vm_map_pages*() and vmf_insert_mixed()" David
Hildenbrand has reworked the rather sketchy handling of the use of the
zeropage in MAP_SHARED mappings. I don't see any runtime effects here -
more a cleanup/understandability/maintainablity thing.
- Dev Jain has improved selftests/mm/va_high_addr_switch.c's handling of
higher addresses, for aarch64. The (poorly named) series is
"Restructure va_high_addr_switch".
- The core TLB handling code gets some cleanups and possible slight
optimizations in Bang Li's series "Add update_mmu_tlb_range() to
simplify code".
- Jane Chu has improved the handling of our
fake-an-unrecoverable-memory-error testing feature MADV_HWPOISON in the
series "Enhance soft hwpoison handling and injection".
- Jeff Johnson has sent a billion patches everywhere to add
MODULE_DESCRIPTION() to everything. Some landed in this pull.
- In the series "mm: cleanup MIGRATE_SYNC_NO_COPY mode", Kefeng Wang has
simplified migration's use of hardware-offload memory copying.
- Yosry Ahmed performs more folio API conversions in his series "mm:
zswap: trivial folio conversions".
- In the series "large folios swap-in: handle refault cases first",
Chuanhua Han inches us forward in the handling of large pages in the
swap code. This is a cleanup and optimization, working toward the end
objective of full support of large folio swapin/out.
- In the series "mm,swap: cleanup VMA based swap readahead window
calculation", Huang Ying has contributed some cleanups and a possible
fixlet to his VMA based swap readahead code.
- In the series "add mTHP support for anonymous shmem" Baolin Wang has
taught anonymous shmem mappings to use multisize THP. By default this
is a no-op - users must opt in vis sysfs controls. Dramatic
improvements in pagefault latency are realized.
- David Hildenbrand has some cleanups to our remaining use of
page_mapcount() in the series "fs/proc: move page_mapcount() to
fs/proc/internal.h".
- David also has some highmem accounting cleanups in the series
"mm/highmem: don't track highmem pages manually".
- Build-time fixes and cleanups from John Hubbard in the series
"cleanups, fixes, and progress towards avoiding "make headers"".
- Cleanups and consolidation of the core pagemap handling from Barry
Song in the series "mm: introduce pmd|pte_needs_soft_dirty_wp helpers
and utilize them".
- Lance Yang's series "Reclaim lazyfree THP without splitting" has
reduced the latency of the reclaim of pmd-mapped THPs under fairly
common circumstances. A 10x speedup is seen in a microbenchmark.
It does this by punting to aother CPU but I guess that's a win unless
all CPUs are pegged.
- hugetlb_cgroup cleanups from Xiu Jianfeng in the series
"mm/hugetlb_cgroup: rework on cftypes".
- Miaohe Lin's series "Some cleanups for memory-failure" does just that
thing.
- Is anyone reading this stuff? If so, email me!
- Someone other than SeongJae has developed a DAMON feature in Honggyu
Kim's series "DAMON based tiered memory management for CXL memory".
This adds DAMON features which may be used to help determine the
efficiency of our placement of CXL/PCIe attached DRAM.
- DAMON user API centralization and simplificatio work in SeongJae
Park's series "mm/damon: introduce DAMON parameters online commit
function".
- In the series "mm: page_type, zsmalloc and page_mapcount_reset()"
David Hildenbrand does some maintenance work on zsmalloc - partially
modernizing its use of pageframe fields.
- Kefeng Wang provides more folio conversions in the series "mm: remove
page_maybe_dma_pinned() and page_mkclean()".
- More cleanup from David Hildenbrand, this time in the series
"mm/memory_hotplug: use PageOffline() instead of PageReserved() for
!ZONE_DEVICE". It "enlightens memory hotplug more about PageOffline()
pages" and permits the removal of some virtio-mem hacks.
- Barry Song's series "mm: clarify folio_add_new_anon_rmap() and
__folio_add_anon_rmap()" is a cleanup to the anon folio handling in
preparation for mTHP (multisize THP) swapin.
- Kefeng Wang's series "mm: improve clear and copy user folio"
implements more folio conversions, this time in the area of large folio
userspace copying.
- The series "Docs/mm/damon/maintaier-profile: document a mailing tool
and community meetup series" tells people how to get better involved
with other DAMON developers. From SeongJae Park.
- A large series ("kmsan: Enable on s390") from Ilya Leoshkevich does
that.
- David Hildenbrand sends along more cleanups, this time against the
migration code. The series is "mm/migrate: move NUMA hinting fault
folio isolation + checks under PTL".
- Jan Kara has found quite a lot of strangenesses and minor errors in
the readahead code. He addresses this in the series "mm: Fix various
readahead quirks".
- SeongJae Park's series "selftests/damon: test DAMOS tried regions and
{min,max}_nr_regions" adds features and addresses errors in DAMON's self
testing code.
- Gavin Shan has found a userspace-triggerable WARN in the pagecache
code. The series "mm/filemap: Limit page cache size to that supported
by xarray" addresses this. The series is marked cc:stable.
- Chengming Zhou's series "mm/ksm: cmp_and_merge_page() optimizations
and cleanup" cleans up and slightly optimizes KSM.
- Roman Gushchin has separated the memcg-v1 and memcg-v2 code - lots of
code motion. The series (which also makes the memcg-v1 code
Kconfigurable) are
"mm: memcg: separate legacy cgroup v1 code and put under config
option" and
"mm: memcg: put cgroup v1-specific memcg data under CONFIG_MEMCG_V1"
- Dan Schatzberg's series "Add swappiness argument to memory.reclaim"
adds an additional feature to this cgroup-v2 control file.
- The series "Userspace controls soft-offline pages" from Jiaqi Yan
permits userspace to stop the kernel's automatic treatment of excessive
correctable memory errors. In order to permit userspace to monitor and
handle this situation.
- Kefeng Wang's series "mm: migrate: support poison recover from migrate
folio" teaches the kernel to appropriately handle migration from
poisoned source folios rather than simply panicing.
- SeongJae Park's series "Docs/damon: minor fixups and improvements"
does those things.
- In the series "mm/zsmalloc: change back to per-size_class lock"
Chengming Zhou improves zsmalloc's scalability and memory utilization.
- Vivek Kasireddy's series "mm/gup: Introduce memfd_pin_folios() for
pinning memfd folios" makes the GUP code use FOLL_PIN rather than bare
refcount increments. So these paes can first be moved aside if they
reside in the movable zone or a CMA block.
- Andrii Nakryiko has added a binary ioctl()-based API to /proc/pid/maps
for much faster reading of vma information. The series is "query VMAs
from /proc/<pid>/maps".
- In the series "mm: introduce per-order mTHP split counters" Lance Yang
improves the kernel's presentation of developer information related to
multisize THP splitting.
- Michael Ellerman has developed the series "Reimplement huge pages
without hugepd on powerpc (8xx, e500, book3s/64)". This permits
userspace to use all available huge page sizes.
- In the series "revert unconditional slab and page allocator fault
injection calls" Vlastimil Babka removes a performance-affecting and not
very useful feature from slab fault injection.
-----BEGIN PGP SIGNATURE-----
iHUEABYKAB0WIQTTMBEPP41GrTpTJgfdBJ7gKXxAjgUCZp2C+QAKCRDdBJ7gKXxA
joTkAQDvjqOoFStqk4GU3OXMYB7WCU/ZQMFG0iuu1EEwTVDZ4QEA8CnG7seek1R3
xEoo+vw0sWWeLV3qzsxnCA1BJ8cTJA8=
=z0Lf
-----END PGP SIGNATURE-----
Merge tag 'mm-stable-2024-07-21-14-50' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
Pull MM updates from Andrew Morton:
- In the series "mm: Avoid possible overflows in dirty throttling" Jan
Kara addresses a couple of issues in the writeback throttling code.
These fixes are also targetted at -stable kernels.
- Ryusuke Konishi's series "nilfs2: fix potential issues related to
reserved inodes" does that. This should actually be in the
mm-nonmm-stable tree, along with the many other nilfs2 patches. My
bad.
- More folio conversions from Kefeng Wang in the series "mm: convert to
folio_alloc_mpol()"
- Kemeng Shi has sent some cleanups to the writeback code in the series
"Add helper functions to remove repeated code and improve readability
of cgroup writeback"
- Kairui Song has made the swap code a little smaller and a little
faster in the series "mm/swap: clean up and optimize swap cache
index".
- In the series "mm/memory: cleanly support zeropage in
vm_insert_page*(), vm_map_pages*() and vmf_insert_mixed()" David
Hildenbrand has reworked the rather sketchy handling of the use of
the zeropage in MAP_SHARED mappings. I don't see any runtime effects
here - more a cleanup/understandability/maintainablity thing.
- Dev Jain has improved selftests/mm/va_high_addr_switch.c's handling
of higher addresses, for aarch64. The (poorly named) series is
"Restructure va_high_addr_switch".
- The core TLB handling code gets some cleanups and possible slight
optimizations in Bang Li's series "Add update_mmu_tlb_range() to
simplify code".
- Jane Chu has improved the handling of our
fake-an-unrecoverable-memory-error testing feature MADV_HWPOISON in
the series "Enhance soft hwpoison handling and injection".
- Jeff Johnson has sent a billion patches everywhere to add
MODULE_DESCRIPTION() to everything. Some landed in this pull.
- In the series "mm: cleanup MIGRATE_SYNC_NO_COPY mode", Kefeng Wang
has simplified migration's use of hardware-offload memory copying.
- Yosry Ahmed performs more folio API conversions in his series "mm:
zswap: trivial folio conversions".
- In the series "large folios swap-in: handle refault cases first",
Chuanhua Han inches us forward in the handling of large pages in the
swap code. This is a cleanup and optimization, working toward the end
objective of full support of large folio swapin/out.
- In the series "mm,swap: cleanup VMA based swap readahead window
calculation", Huang Ying has contributed some cleanups and a possible
fixlet to his VMA based swap readahead code.
- In the series "add mTHP support for anonymous shmem" Baolin Wang has
taught anonymous shmem mappings to use multisize THP. By default this
is a no-op - users must opt in vis sysfs controls. Dramatic
improvements in pagefault latency are realized.
- David Hildenbrand has some cleanups to our remaining use of
page_mapcount() in the series "fs/proc: move page_mapcount() to
fs/proc/internal.h".
- David also has some highmem accounting cleanups in the series
"mm/highmem: don't track highmem pages manually".
- Build-time fixes and cleanups from John Hubbard in the series
"cleanups, fixes, and progress towards avoiding "make headers"".
- Cleanups and consolidation of the core pagemap handling from Barry
Song in the series "mm: introduce pmd|pte_needs_soft_dirty_wp helpers
and utilize them".
- Lance Yang's series "Reclaim lazyfree THP without splitting" has
reduced the latency of the reclaim of pmd-mapped THPs under fairly
common circumstances. A 10x speedup is seen in a microbenchmark.
It does this by punting to aother CPU but I guess that's a win unless
all CPUs are pegged.
- hugetlb_cgroup cleanups from Xiu Jianfeng in the series
"mm/hugetlb_cgroup: rework on cftypes".
- Miaohe Lin's series "Some cleanups for memory-failure" does just that
thing.
- Someone other than SeongJae has developed a DAMON feature in Honggyu
Kim's series "DAMON based tiered memory management for CXL memory".
This adds DAMON features which may be used to help determine the
efficiency of our placement of CXL/PCIe attached DRAM.
- DAMON user API centralization and simplificatio work in SeongJae
Park's series "mm/damon: introduce DAMON parameters online commit
function".
- In the series "mm: page_type, zsmalloc and page_mapcount_reset()"
David Hildenbrand does some maintenance work on zsmalloc - partially
modernizing its use of pageframe fields.
- Kefeng Wang provides more folio conversions in the series "mm: remove
page_maybe_dma_pinned() and page_mkclean()".
- More cleanup from David Hildenbrand, this time in the series
"mm/memory_hotplug: use PageOffline() instead of PageReserved() for
!ZONE_DEVICE". It "enlightens memory hotplug more about PageOffline()
pages" and permits the removal of some virtio-mem hacks.
- Barry Song's series "mm: clarify folio_add_new_anon_rmap() and
__folio_add_anon_rmap()" is a cleanup to the anon folio handling in
preparation for mTHP (multisize THP) swapin.
- Kefeng Wang's series "mm: improve clear and copy user folio"
implements more folio conversions, this time in the area of large
folio userspace copying.
- The series "Docs/mm/damon/maintaier-profile: document a mailing tool
and community meetup series" tells people how to get better involved
with other DAMON developers. From SeongJae Park.
- A large series ("kmsan: Enable on s390") from Ilya Leoshkevich does
that.
- David Hildenbrand sends along more cleanups, this time against the
migration code. The series is "mm/migrate: move NUMA hinting fault
folio isolation + checks under PTL".
- Jan Kara has found quite a lot of strangenesses and minor errors in
the readahead code. He addresses this in the series "mm: Fix various
readahead quirks".
- SeongJae Park's series "selftests/damon: test DAMOS tried regions and
{min,max}_nr_regions" adds features and addresses errors in DAMON's
self testing code.
- Gavin Shan has found a userspace-triggerable WARN in the pagecache
code. The series "mm/filemap: Limit page cache size to that supported
by xarray" addresses this. The series is marked cc:stable.
- Chengming Zhou's series "mm/ksm: cmp_and_merge_page() optimizations
and cleanup" cleans up and slightly optimizes KSM.
- Roman Gushchin has separated the memcg-v1 and memcg-v2 code - lots of
code motion. The series (which also makes the memcg-v1 code
Kconfigurable) are "mm: memcg: separate legacy cgroup v1 code and put
under config option" and "mm: memcg: put cgroup v1-specific memcg
data under CONFIG_MEMCG_V1"
- Dan Schatzberg's series "Add swappiness argument to memory.reclaim"
adds an additional feature to this cgroup-v2 control file.
- The series "Userspace controls soft-offline pages" from Jiaqi Yan
permits userspace to stop the kernel's automatic treatment of
excessive correctable memory errors. In order to permit userspace to
monitor and handle this situation.
- Kefeng Wang's series "mm: migrate: support poison recover from
migrate folio" teaches the kernel to appropriately handle migration
from poisoned source folios rather than simply panicing.
- SeongJae Park's series "Docs/damon: minor fixups and improvements"
does those things.
- In the series "mm/zsmalloc: change back to per-size_class lock"
Chengming Zhou improves zsmalloc's scalability and memory
utilization.
- Vivek Kasireddy's series "mm/gup: Introduce memfd_pin_folios() for
pinning memfd folios" makes the GUP code use FOLL_PIN rather than
bare refcount increments. So these paes can first be moved aside if
they reside in the movable zone or a CMA block.
- Andrii Nakryiko has added a binary ioctl()-based API to
/proc/pid/maps for much faster reading of vma information. The series
is "query VMAs from /proc/<pid>/maps".
- In the series "mm: introduce per-order mTHP split counters" Lance
Yang improves the kernel's presentation of developer information
related to multisize THP splitting.
- Michael Ellerman has developed the series "Reimplement huge pages
without hugepd on powerpc (8xx, e500, book3s/64)". This permits
userspace to use all available huge page sizes.
- In the series "revert unconditional slab and page allocator fault
injection calls" Vlastimil Babka removes a performance-affecting and
not very useful feature from slab fault injection.
* tag 'mm-stable-2024-07-21-14-50' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (411 commits)
mm/mglru: fix ineffective protection calculation
mm/zswap: fix a white space issue
mm/hugetlb: fix kernel NULL pointer dereference when migrating hugetlb folio
mm/hugetlb: fix possible recursive locking detected warning
mm/gup: clear the LRU flag of a page before adding to LRU batch
mm/numa_balancing: teach mpol_to_str about the balancing mode
mm: memcg1: convert charge move flags to unsigned long long
alloc_tag: fix page_ext_get/page_ext_put sequence during page splitting
lib: reuse page_ext_data() to obtain codetag_ref
lib: add missing newline character in the warning message
mm/mglru: fix overshooting shrinker memory
mm/mglru: fix div-by-zero in vmpressure_calc_level()
mm/kmemleak: replace strncpy() with strscpy()
mm, page_alloc: put should_fail_alloc_page() back behing CONFIG_FAIL_PAGE_ALLOC
mm, slab: put should_failslab() back behind CONFIG_SHOULD_FAILSLAB
mm: ignore data-race in __swap_writepage
hugetlbfs: ensure generic_hugetlb_get_unmapped_area() returns higher address than mmap_min_addr
mm: shmem: rename mTHP shmem counters
mm: swap_state: use folio_alloc_mpol() in __read_swap_cache_async()
mm/migrate: putback split folios when numa hint migration fails
...
Here is the "big" set of char/misc and other driver subsystem changes
for 6.11-rc1. Nothing major in here, just loads of new drivers and
updates. Included in here are:
- IIO api updates and new drivers added
- wait_interruptable_timeout() api cleanups for some drivers
- MODULE_DESCRIPTION() additions for loads of drivers
- parport out-of-bounds fix
- interconnect driver updates and additions
- mhi driver updates and additions
- w1 driver fixes
- binder speedups and fixes
- eeprom driver updates
- coresight driver updates
- counter driver update
- new misc driver additions
- other minor api updates
All of these, EXCEPT for the final Kconfig build fix for 32bit systems,
have been in linux-next for a while with no reported issues. The
Kconfig fixup went in 29 hours ago, so might have missed the latest
linux-next, but was acked by everyone involved.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-----BEGIN PGP SIGNATURE-----
iG0EABECAC0WIQT0tgzFv3jCIUoxPcsxR9QN2y37KQUCZppR4w8cZ3JlZ0Brcm9h
aC5jb20ACgkQMUfUDdst+ykwoQCeIaW3nbOiNTmOupvEnZwrN3yVNs8An3Q5L+Br
1LpTASaU6A8pN81Z1m5g
=6U1z
-----END PGP SIGNATURE-----
Merge tag 'char-misc-6.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc
Pull char / misc and other driver updates from Greg KH:
"Here is the "big" set of char/misc and other driver subsystem changes
for 6.11-rc1. Nothing major in here, just loads of new drivers and
updates. Included in here are:
- IIO api updates and new drivers added
- wait_interruptable_timeout() api cleanups for some drivers
- MODULE_DESCRIPTION() additions for loads of drivers
- parport out-of-bounds fix
- interconnect driver updates and additions
- mhi driver updates and additions
- w1 driver fixes
- binder speedups and fixes
- eeprom driver updates
- coresight driver updates
- counter driver update
- new misc driver additions
- other minor api updates
All of these, EXCEPT for the final Kconfig build fix for 32bit
systems, have been in linux-next for a while with no reported issues.
The Kconfig fixup went in 29 hours ago, so might have missed the
latest linux-next, but was acked by everyone involved"
* tag 'char-misc-6.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (330 commits)
misc: Kconfig: exclude mrvl-cn10k-dpi compilation for 32-bit systems
misc: delete Makefile.rej
binder: fix hang of unregistered readers
misc: Kconfig: add a new dependency for MARVELL_CN10K_DPI
virtio: add missing MODULE_DESCRIPTION() macro
agp: uninorth: add missing MODULE_DESCRIPTION() macro
spmi: add missing MODULE_DESCRIPTION() macros
dev/parport: fix the array out-of-bounds risk
samples: configfs: add missing MODULE_DESCRIPTION() macro
misc: mrvl-cn10k-dpi: add Octeon CN10K DPI administrative driver
misc: keba: Fix missing AUXILIARY_BUS dependency
slimbus: Fix struct and documentation alignment in stream.c
MAINTAINERS: CC dri-devel list on Qualcomm FastRPC patches
misc: fastrpc: use coherent pool for untranslated Compute Banks
misc: fastrpc: support complete DMA pool access to the DSP
misc: fastrpc: add missing MODULE_DESCRIPTION() macro
misc: fastrpc: Add missing dev_err newlines
misc: fastrpc: Use memdup_user()
nvmem: core: Implement force_ro sysfs attribute
nvmem: Use sysfs_emit() for type attribute
...
Provide a generic C vDSO getrandom() implementation, which operates on
an opaque state returned by vgetrandom_alloc() and produces random bytes
the same way as getrandom(). This has the following API signature:
ssize_t vgetrandom(void *buffer, size_t len, unsigned int flags,
void *opaque_state, size_t opaque_len);
The return value and the first three arguments are the same as ordinary
getrandom(), while the last two arguments are a pointer to the opaque
allocated state and its size. Were all five arguments passed to the
getrandom() syscall, nothing different would happen, and the functions
would have the exact same behavior.
The actual vDSO RNG algorithm implemented is the same one implemented by
drivers/char/random.c, using the same fast-erasure techniques as that.
Should the in-kernel implementation change, so too will the vDSO one.
It requires an implementation of ChaCha20 that does not use any stack,
in order to maintain forward secrecy if a multi-threaded program forks
(though this does not account for a similar issue with SA_SIGINFO
copying registers to the stack), so this is left as an
architecture-specific fill-in. Stack-less ChaCha20 is an easy algorithm
to implement on a variety of architectures, so this shouldn't be too
onerous.
Initially, the state is keyless, and so the first call makes a
getrandom() syscall to generate that key, and then uses it for
subsequent calls. By keeping track of a generation counter, it knows
when its key is invalidated and it should fetch a new one using the
syscall. Later, more than just a generation counter might be used.
Since MADV_WIPEONFORK is set on the opaque state, the key and related
state is wiped during a fork(), so secrets don't roll over into new
processes, and the same state doesn't accidentally generate the same
random stream. The generation counter, as well, is always >0, so that
the 0 counter is a useful indication of a fork() or otherwise
uninitialized state.
If the kernel RNG is not yet initialized, then the vDSO always calls the
syscall, because that behavior cannot be emulated in userspace, but
fortunately that state is short lived and only during early boot. If it
has been initialized, then there is no need to inspect the `flags`
argument, because the behavior does not change post-initialization
regardless of the `flags` value.
Since the opaque state passed to it is mutated, vDSO getrandom() is not
reentrant, when used with the same opaque state, which libc should be
mindful of.
The function works over an opaque per-thread state of a particular size,
which must be marked VM_WIPEONFORK, VM_DONTDUMP, VM_NORESERVE, and
VM_DROPPABLE for proper operation. Over time, the nuances of these
allocations may change or grow or even differ based on architectural
features.
The opaque state passed to vDSO getrandom() must be allocated using the
mmap_flags and mmap_prot parameters provided by the vgetrandom_opaque_params
struct, which also contains the size of each state. That struct can be
obtained with a call to vgetrandom(NULL, 0, 0, ¶ms, ~0UL). Then,
libc can call mmap(2) and slice up the returned array into a state per
each thread, while ensuring that no single state straddles a page
boundary. Libc is expected to allocate a chunk of these on first use,
and then dole them out to threads as they're created, allocating more
when needed.
vDSO getrandom() provides the ability for userspace to generate random
bytes quickly and safely, and is intended to be integrated into libc's
thread management. As an illustrative example, the introduced code in
the vdso_test_getrandom self test later in this series might be used to
do the same outside of libc. In a libc the various pthread-isms are
expected to be elided into libc internals.
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
API:
- Test setkey in no-SIMD context.
- Add skcipher speed test for user-specified algorithm.
Algorithms:
- Add x25519 support on ppc64le.
- Add VAES and AVX512 / AVX10 optimized AES-GCM on x86.
- Remove sm2 algorithm.
Drivers:
- Add Allwinner H616 support to sun8i-ce.
- Use DMA in stm32.
- Add Exynos850 hwrng support to exynos.
-----BEGIN PGP SIGNATURE-----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=x80X
-----END PGP SIGNATURE-----
Merge tag 'v6.11-p1' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6
Pull crypto update from Herbert Xu:
"API:
- Test setkey in no-SIMD context
- Add skcipher speed test for user-specified algorithm
Algorithms:
- Add x25519 support on ppc64le
- Add VAES and AVX512 / AVX10 optimized AES-GCM on x86
- Remove sm2 algorithm
Drivers:
- Add Allwinner H616 support to sun8i-ce
- Use DMA in stm32
- Add Exynos850 hwrng support to exynos"
* tag 'v6.11-p1' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6: (81 commits)
hwrng: core - remove (un)register_miscdev()
crypto: lib/mpi - delete unnecessary condition
crypto: testmgr - generate power-of-2 lengths more often
crypto: mxs-dcp - Ensure payload is zero when using key slot
hwrng: Kconfig - Do not enable by default CN10K driver
crypto: starfive - Fix nent assignment in rsa dec
crypto: starfive - Align rsa input data to 32-bit
crypto: qat - fix unintentional re-enabling of error interrupts
crypto: qat - extend scope of lock in adf_cfg_add_key_value_param()
Documentation: qat: fix auto_reset attribute details
crypto: sun8i-ce - add Allwinner H616 support
crypto: sun8i-ce - wrap accesses to descriptor address fields
dt-bindings: crypto: sun8i-ce: Add compatible for H616
hwrng: core - Fix wrong quality calculation at hw rng registration
hwrng: exynos - Enable Exynos850 support
hwrng: exynos - Add SMC based TRNG operation
hwrng: exynos - Implement bus clock control
hwrng: exynos - Use devm_clk_get_enabled() to get the clock
hwrng: exynos - Improve coding style
dt-bindings: rng: Add Exynos850 support to exynos-trng
...
Configuration for sbq:
depth=64, wake_batch=6, shift=6, map_nr=1
1. There are 64 requests in progress:
map->word = 0xFFFFFFFFFFFFFFFF
2. After all the 64 requests complete, and no more requests come:
map->word = 0xFFFFFFFFFFFFFFFF, map->cleared = 0xFFFFFFFFFFFFFFFF
3. Now two tasks try to allocate requests:
T1: T2:
__blk_mq_get_tag .
__sbitmap_queue_get .
sbitmap_get .
sbitmap_find_bit .
sbitmap_find_bit_in_word .
__sbitmap_get_word -> nr=-1 __blk_mq_get_tag
sbitmap_deferred_clear __sbitmap_queue_get
/* map->cleared=0xFFFFFFFFFFFFFFFF */ sbitmap_find_bit
if (!READ_ONCE(map->cleared)) sbitmap_find_bit_in_word
return false; __sbitmap_get_word -> nr=-1
mask = xchg(&map->cleared, 0) sbitmap_deferred_clear
atomic_long_andnot() /* map->cleared=0 */
if (!(map->cleared))
return false;
/*
* map->cleared is cleared by T1
* T2 fail to acquire the tag
*/
4. T2 is the sole tag waiter. When T1 puts the tag, T2 cannot be woken
up due to the wake_batch being set at 6. If no more requests come, T1
will wait here indefinitely.
This patch achieves two purposes:
1. Check on ->cleared and update on both ->cleared and ->word need to
be done atomically, and using spinlock could be the simplest solution.
2. Add extra check in sbitmap_deferred_clear(), to identify whether
->word has free bits.
Fixes: ea86ea2cdc ("sbitmap: ammortize cost of clearing bits")
Signed-off-by: Yang Yang <yang.yang@vivo.com>
Reviewed-by: Ming Lei <ming.lei@redhat.com>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Link: https://lore.kernel.org/r/20240716082644.659566-1-yang.yang@vivo.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
-----BEGIN PGP SIGNATURE-----
iQEzBAABCAAdFiEEe7vIQRWZI0iWSE3xu+CwddJFiJoFAmaXl0kACgkQu+CwddJF
iJrOlgf+N/G7BmgoW2CBF7mKsvCYs+pX3xeBuxPtsuq4FD386nsPFMN8gWAYLG3q
ZU1z1S+0M8LhTg6/G9jMYLHt2Y7WhYbhFTjTHmULJkuhMDTUP9CRYy4XZ+hdPtHF
30ezSdJQF9x/XxCSaaRVK1s+SMVHFg5xAOHKpfkNSamcMz9g+ZkYyPBr10/VoKd0
JqwhW7r6hrlvWAiqY3QKCOvohIWglgvBUnNjUGMh1cUkOE2aYLYHklhRwICKgA6z
p/2BUXiAEWUtgBkUrizwm/pdhJXLs0pOeYarVZP1v83tQMxyrc6XLNnqhvxP3DPW
31thF5Rf9I8WaWTczXhxsAwFjqO3KQ==
=4uf9
-----END PGP SIGNATURE-----
Merge tag 'slab-for-6.11' of git://git.kernel.org/pub/scm/linux/kernel/git/vbabka/slab
Pull slab updates from Vlastimil Babka:
"The most prominent change this time is the kmem_buckets based
hardening of kmalloc() allocations from Kees Cook.
We have also extended the kmalloc() alignment guarantees for
non-power-of-two sizes in a way that benefits rust.
The rest are various cleanups and non-critical fixups.
- Dedicated bucket allocator (Kees Cook)
This series [1] enhances the probabilistic defense against heap
spraying/grooming of CONFIG_RANDOM_KMALLOC_CACHES from last year.
kmalloc() users that are known to be useful for exploits can get
completely separate set of kmalloc caches that can't be shared with
other users. The first converted users are alloc_msg() and
memdup_user().
The hardening is enabled by CONFIG_SLAB_BUCKETS.
- Extended kmalloc() alignment guarantees (Vlastimil Babka)
For years now we have guaranteed natural alignment for power-of-two
allocations, but nothing was defined for other sizes (in practice,
we have two such buckets, kmalloc-96 and kmalloc-192).
To avoid unnecessary padding in the rust layer due to its alignment
rules, extend the guarantee so that the alignment is at least the
largest power-of-two divisor of the requested size.
This fits what rust needs, is a superset of the existing
power-of-two guarantee, and does not in practice change the layout
(and thus does not add overhead due to padding) of the kmalloc-96
and kmalloc-192 caches, unless slab debugging is enabled for them.
- Cleanups and non-critical fixups (Chengming Zhou, Suren
Baghdasaryan, Matthew Willcox, Alex Shi, and Vlastimil Babka)
Various tweaks related to the new alloc profiling code, folio
conversion, debugging and more leftovers after SLAB"
Link: https://lore.kernel.org/all/20240701190152.it.631-kees@kernel.org/ [1]
* tag 'slab-for-6.11' of git://git.kernel.org/pub/scm/linux/kernel/git/vbabka/slab:
mm/memcg: alignment memcg_data define condition
mm, slab: move prepare_slab_obj_exts_hook under CONFIG_MEM_ALLOC_PROFILING
mm, slab: move allocation tagging code in the alloc path into a hook
mm/util: Use dedicated slab buckets for memdup_user()
ipc, msg: Use dedicated slab buckets for alloc_msg()
mm/slab: Introduce kmem_buckets_create() and family
mm/slab: Introduce kvmalloc_buckets_node() that can take kmem_buckets argument
mm/slab: Plumb kmem_buckets into __do_kmalloc_node()
mm/slab: Introduce kmem_buckets typedef
slab, rust: extend kmalloc() alignment guarantees to remove Rust padding
slab: delete useless RED_INACTIVE and RED_ACTIVE
slab: don't put freepointer outside of object if only orig_size
slab: make check_object() more consistent
mm: Reduce the number of slab->folio casts
mm, slab: don't wrap internal functions with alloc_hooks()
- Remove duplicate included header file linux/bootconfig.h from
lib/bootconfig.c. This is a cleanup, no behavior change.
-----BEGIN PGP SIGNATURE-----
iQFPBAABCgA5FiEEh7BulGwFlgAOi5DV2/sHvwUrPxsFAmaWhj4bHG1hc2FtaS5o
aXJhbWF0c3VAZ21haWwuY29tAAoJENv7B78FKz8bdd0H/iraZ7ZOFWxCapOZI4dL
7f870j0PQG/KU7lB4jAo+3u7YyQWQTTLdhDPEOci4axsDG+56C/SVpHV0Z26SGHX
ZqcKlA/H0HT4BA3zG1leRzXC/qPYiAEdIw38NngYPYBUWhqM3qmYlrRIBeg89VrM
B4yaIJA/Uae7KAlB2dcmhmrIg86QK1iPKU6G+U5mIFecxDQmowE7z5f5pI/K/M5j
2HT2Kg1XPTtxOb15mKtA19TXbbA1IqYUvwW5jOffppKMwtiggEaOj4mLQ1MhlrP0
pEb1OJMx21MvEJYtjOXi8qsSGOhdWH8sBpxdUv21GzwRvOuG/AoaN1YKMIZCQp1K
Jjo=
=Bjzb
-----END PGP SIGNATURE-----
Merge tag 'bootconfig-v6.11' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace
Pull bootconfig update from Masami Hiramatsu:
- Remove duplicate included header file linux/bootconfig.h from
lib/bootconfig.c. This is a cleanup, no behavior change.
* tag 'bootconfig-v6.11' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace:
bootconfig: Remove duplicate included header file linux/bootconfig.h
core:
- deprecate DRM data and return 0 date
- connector: Create a set of helpers to help with HDMI support
- Remove driver owner assignments
- Allow more drivers to compile with COMPILE_TEST
- Conversions to drm_edid
- Sprinkle MODULE_DESCRIPTIONS everywhere they are missing
- Remove drm_mm_replace_node
- print: Add a drm prefix to warn level messages too, remove
___drm_dbg, consolidate prefix handling
- New monochrome TV mode variant
ttm:
- improve number of page faults on some platforms
- fix test builds under PREEMPT_RT
- more test coverage
ci:
- Require a more recent version of mesa,
- improve farm setup and test generation
dma-buf:
- warn if reserving 0 fence slots
- internal API heap enhancements
fbdev:
- Create memory manager optimized fbdev emulation
panic:
- Allow to select fonts,
- improve drm_fb_dma_get_scanout_buffer
- Allow to dump kmsg to the screen
bridge:
- Remove redundant checks on bridge->encoder
- Remove drm_bridge_chain_mode_fixup
- bridge-connector: Plumb in the new HDMI helper
- analogix_dp: Various improvements, handle AUX transfers timeout
- samsung-dsim: Fix timings calculation
- tc358767: Plenty of small fixes, fix no connector attach, fix clocks
- sii902x: state validation improvements
panels:
- Switch panels from register table initialization to proper code
- Now that the panel code tracks the panel state, remove every
ad-hoc implementation in the panel drivers
- More cleanup of prepare / enable state tracking in drivers
- edp: Drop legacy panel compatibles
- simple-bridge: Switch to devm_drm_bridge_add
- New panels: Lincoln Tech Sol LCD185-101CT, Microtips Technology
13-101HIEBCAF0-C, Microtips Technology MF-103HIEB0GA0, BOE
nv110wum-l60, IVO t109nw41, WL-355608-A8, PrimeView PM070WL4,
Lincoln Technologies LCD197, Ortustech COM35H3P70ULC,
AUO G104STN01, K&d kd101ne3-40ti
amdgpu:
- DCN 4.0.x support
- GC 12.0 support
- GMC 12.0 support
- SDMA 7.0 support
- MES12 support
- MMHUB 4.1 support
- GFX12 modifier and DCC support
- lots of IP fixes/updates
amdkfd:
- Contiguous VRAM allocations
- GC 12.0 support
- SDMA 7.0 support
- SR-IOV fixes
- KFD GFX ALU exceptions
i915:
- Battlemage Xe2 HPD display enablement
- Panel Replay enabling
- DP AUX-less ALPM/LOBF
- Enable link training failure fallback for DP MST links
- CMRR (Content Match Refresh Rate) enabling
- Increase ADL-S/ADL-P/DG2+ max TMDS bitrate to 6 Gbps
- Enable eDP AUX based HDR backlight
- Support replaying GPU hangs with captured context image
- Automate CCS Mode setting during engine resets
- lots of refactoring
- Support replaying GPU hangs with captured context image
- Increase FLR timeout from 3s to 9s
- Enable w/a 16021333562 for DG2, MTL and ARL [guc]
xe:
- update MAINATINERS
- New uapi adding OA functionality to Xe
- expose l3 bank mask
- fix display detect on ADL-N
- runtime PM Fixes
- Fix silent backmerge issues
- More prep for SR-IOV
- HWmon additions
- per client usage info
- Rework GPU page fault handling
- Drop EXEC_QUEUE_FLAG_BANNED
- Add BMG PCI IDs
- Scheduler fixes and improvements
- Rename xe_exec_queue::compute to xe_exec_queue::lr
- Use ttm_uncached for BO with NEEDS_UC flag
- Rename xe perf layer as xe observation layer
- lots of refactoring
radeon:
- Backlight workaround for iMac
- Silence UBSAN flex array warnings
msm:
- Validate registers XML description against schema in CI
- core/dpu: SM7150 support
- mdp5: Add support for MSM8937
- gpu: Add param for userspace to know if raytracing is supported
- gpu: X185 support (aka gpu in X1 laptop chips)
- gpu: a505 support
ivpu:
- hardware scheduler support
- profiling support
- improvements to the platform support layer
- firmware handling improvements
- clocks/power mgmt improvements
- scheduler/logging improvements
habanalabs:
- Gradual sleep in polling memory macro.
- Reduce Gaudi2 MSI-X interrupt count to 128.
- Add Gaudi2-D revision support.
- Add timestamp to CPLD info.
- Gaudi2: Assume hard-reset by firmware upon MC SEI severe error.
- Align Gaudi2 interrupt names.
- Check for errors after preboot is ready.
- Change habanalabs maintainer and git repo path.
mgag200:
- refactoring and improvements
- Add BMC output
- enable polling
nouveau:
- add registry command line
v3d:
- perf counters improvements
zynqmp:
- irq and debugfs improvements
atmel-hlcdc:
- Support XLCDC in sam9x7
mipi-dbi:
- Remove mipi_dbi_machine_little_endian
- make SPI bits per word configurable
- support RGB888
- allow pixel formats to be specified in the DT
sun4i:
- Rework the blender setup for DE2
panfrost:
- Enable MT8188 support
vc4:
- Monochrome TV support
exynos:
- fix fallback mode regression
- fix memory leak
- Use drm_edid_duplicate() instead of kmemdup()
etnaviv:
- fix i.MX8MP NPU clock gating
- workaround FE register cdc issues on some cores
- fix DMA sync handling for cached buffers
- fix job timeout handling
- keep TS enabled on MMUv2 cores for improved performance
mediatek:
- Convert to platform remove callback returning void-
- Drop chain_mode_fixup call in mode_valid()
- Fixes the errors of MediaTek display driver found by IGT.
- Add display support for the MT8365-EVK board
- Fix bit depth overwritten for mtk_ovl_set bit_depth()
- Fix possible_crtcs calculation
- Fix spurious kfree()
ast:
- refactor mode setting code
stm:
- Add LVDS support
- DSI PHY updates
-----BEGIN PGP SIGNATURE-----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=g+Ad
-----END PGP SIGNATURE-----
Merge tag 'drm-next-2024-07-18' of https://gitlab.freedesktop.org/drm/kernel
Pull drm updates from Dave Airlie:
"There's a lot of stuff in here, amd, i915 and xe have new platform
work, lots of core rework around EDID handling, some new COMPILE_TEST
options, maintainer changes and a lots of other stuff. Summary:
core:
- deprecate DRM data and return 0 date
- connector: Create a set of helpers to help with HDMI support
- Remove driver owner assignments
- Allow more drivers to compile with COMPILE_TEST
- Conversions to drm_edid
- Sprinkle MODULE_DESCRIPTIONS everywhere they are missing
- Remove drm_mm_replace_node
- print: Add a drm prefix to warn level messages too, remove
___drm_dbg, consolidate prefix handling
- New monochrome TV mode variant
ttm:
- improve number of page faults on some platforms
- fix test builds under PREEMPT_RT
- more test coverage
ci:
- Require a more recent version of mesa
- improve farm setup and test generation
dma-buf:
- warn if reserving 0 fence slots
- internal API heap enhancements
fbdev:
- Create memory manager optimized fbdev emulation
panic:
- Allow to select fonts
- improve drm_fb_dma_get_scanout_buffer
- Allow to dump kmsg to the screen
bridge:
- Remove redundant checks on bridge->encoder
- Remove drm_bridge_chain_mode_fixup
- bridge-connector: Plumb in the new HDMI helper
- analogix_dp: Various improvements, handle AUX transfers timeout
- samsung-dsim: Fix timings calculation
- tc358767: Plenty of small fixes, fix no connector attach, fix
clocks
- sii902x: state validation improvements
panels:
- Switch panels from register table initialization to proper code
- Now that the panel code tracks the panel state, remove every ad-hoc
implementation in the panel drivers
- More cleanup of prepare / enable state tracking in drivers
- edp: Drop legacy panel compatibles
- simple-bridge: Switch to devm_drm_bridge_add
- New panels: Lincoln Tech Sol LCD185-101CT, Microtips Technology
13-101HIEBCAF0-C, Microtips Technology MF-103HIEB0GA0,
BOE nv110wum-l60, IVO t109nw41, WL-355608-A8, PrimeView
PM070WL4, Lincoln Technologies LCD197, Ortustech
COM35H3P70ULC, AUO G104STN01, K&d kd101ne3-40ti
amdgpu:
- DCN 4.0.x support
- GC 12.0 support
- GMC 12.0 support
- SDMA 7.0 support
- MES12 support
- MMHUB 4.1 support
- GFX12 modifier and DCC support
- lots of IP fixes/updates
amdkfd:
- Contiguous VRAM allocations
- GC 12.0 support
- SDMA 7.0 support
- SR-IOV fixes
- KFD GFX ALU exceptions
i915:
- Battlemage Xe2 HPD display enablement
- Panel Replay enabling
- DP AUX-less ALPM/LOBF
- Enable link training failure fallback for DP MST links
- CMRR (Content Match Refresh Rate) enabling
- Increase ADL-S/ADL-P/DG2+ max TMDS bitrate to 6 Gbps
- Enable eDP AUX based HDR backlight
- Support replaying GPU hangs with captured context image
- Automate CCS Mode setting during engine resets
- lots of refactoring
- Support replaying GPU hangs with captured context image
- Increase FLR timeout from 3s to 9s
- Enable w/a 16021333562 for DG2, MTL and ARL [guc]
xe:
- update MAINATINERS
- New uapi adding OA functionality to Xe
- expose l3 bank mask
- fix display detect on ADL-N
- runtime PM Fixes
- Fix silent backmerge issues
- More prep for SR-IOV
- HWmon additions
- per client usage info
- Rework GPU page fault handling
- Drop EXEC_QUEUE_FLAG_BANNED
- Add BMG PCI IDs
- Scheduler fixes and improvements
- Rename xe_exec_queue::compute to xe_exec_queue::lr
- Use ttm_uncached for BO with NEEDS_UC flag
- Rename xe perf layer as xe observation layer
- lots of refactoring
radeon:
- Backlight workaround for iMac
- Silence UBSAN flex array warnings
msm:
- Validate registers XML description against schema in CI
- core/dpu: SM7150 support
- mdp5: Add support for MSM8937
- gpu: Add param for userspace to know if raytracing is supported
- gpu: X185 support (aka gpu in X1 laptop chips)
- gpu: a505 support
ivpu:
- hardware scheduler support
- profiling support
- improvements to the platform support layer
- firmware handling improvements
- clocks/power mgmt improvements
- scheduler/logging improvements
habanalabs:
- Gradual sleep in polling memory macro
- Reduce Gaudi2 MSI-X interrupt count to 128
- Add Gaudi2-D revision support
- Add timestamp to CPLD info
- Gaudi2: Assume hard-reset by firmware upon MC SEI severe error
- Align Gaudi2 interrupt names
- Check for errors after preboot is ready
- Change habanalabs maintainer and git repo path
mgag200:
- refactoring and improvements
- Add BMC output
- enable polling
nouveau:
- add registry command line
v3d:
- perf counters improvements
zynqmp:
- irq and debugfs improvements
atmel-hlcdc:
- Support XLCDC in sam9x7
mipi-dbi:
- Remove mipi_dbi_machine_little_endian
- make SPI bits per word configurable
- support RGB888
- allow pixel formats to be specified in the DT
sun4i:
- Rework the blender setup for DE2
panfrost:
- Enable MT8188 support
vc4:
- Monochrome TV support
exynos:
- fix fallback mode regression
- fix memory leak
- Use drm_edid_duplicate() instead of kmemdup()
etnaviv:
- fix i.MX8MP NPU clock gating
- workaround FE register cdc issues on some cores
- fix DMA sync handling for cached buffers
- fix job timeout handling
- keep TS enabled on MMUv2 cores for improved performance
mediatek:
- Convert to platform remove callback returning void-
- Drop chain_mode_fixup call in mode_valid()
- Fixes the errors of MediaTek display driver found by IGT
- Add display support for the MT8365-EVK board
- Fix bit depth overwritten for mtk_ovl_set bit_depth()
- Fix possible_crtcs calculation
- Fix spurious kfree()
ast:
- refactor mode setting code
stm:
- Add LVDS support
- DSI PHY updates"
* tag 'drm-next-2024-07-18' of https://gitlab.freedesktop.org/drm/kernel: (2501 commits)
drm/amdgpu/mes12: add missing opcode string
drm/amdgpu/mes11: update opcode strings
Revert "drm/amd/display: Reset freesync config before update new state"
drm/omap: Restrict compile testing to PAGE_SIZE less than 64KB
drm/xe: Drop trace_xe_hw_fence_free
drm/xe/uapi: Rename xe perf layer as xe observation layer
drm/amdgpu: remove exp hw support check for gfx12
drm/amdgpu: timely save bad pages to eeprom after gpu ras reset is completed
drm/amdgpu: flush all cached ras bad pages to eeprom
drm/amdgpu: select compute ME engines dynamically
drm/amd/display: Allow display DCC for DCN401
drm/amdgpu: select compute ME engines dynamically
drm/amdgpu/job: Replace DRM_INFO/ERROR logging
drm/amdgpu: select compute ME engines dynamically
drm/amd/pm: Ignore initial value in smu response register
drm/amdgpu: Initialize VF partition mode
drm/amd/amdgpu: fix SDMA IRQ client ID <-> req mapping
MAINTAINERS: fix Xinhui's name
MAINTAINERS: update powerplay and swsmu
drm/qxl: Pin buffer objects for internal mappings
...
patchsets (devmem among them) did not make it in time.
Core & protocols
----------------
- Use local_lock in addition to local_bh_disable() to protect per-CPU
resources in networking, a step closer for local_bh_disable() not
to act as a big lock on PREEMPT_RT.
- Use flex array for netdevice priv area, ensure its cache alignment.
- Add a sysctl knob to allow user to specify a default rto_min at socket
init time. Bit of a big hammer but multiple companies were
independently carrying such patch downstream so clearly it's useful.
- Support scheduling transmission of packets based on CLOCK_TAI.
- Un-pin TCP TIMEWAIT timer to avoid it firing on CPUs later cordoned off
using cpusets.
- Support multiple L2TPv3 UDP tunnels using the same 5-tuple address.
- Allow configuration of multipath hash seed, to both allow synchronizing
hashing of two routers, and preventing partial accidental sync.
- Improve TCP compliance with RFC 9293 for simultaneous connect().
- Support sending NAT keepalives in IPsec ESP in UDP states. Userspace
IKE daemon had to do this before, but the kernel can better keep
track of it.
- Support sending supervision HSR frames with MAC addresses stored in
ProxyNodeTable when RedBox (i.e. HSR-SAN) is enabled.
- Introduce IPPROTO_SMC for selecting SMC when socket is created.
- Allow UDP GSO transmit from devices with no checksum offload.
- openvswitch: add packet sampling via psample, separating the sampled
traffic from "upcall" packets sent to user space for forwarding.
- nf_tables: shrink memory consumption for transaction objects.
Things we sprinkled into general kernel code
--------------------------------------------
- Power Sequencing subsystem (used by Qualcomm Bluetooth driver
for QCA6390).
- Add IRQ information in sysfs for auxiliary bus.
- Introduce guard definition for local_lock.
- Add aligned flavor of __cacheline_group_{begin, end}() markings for
grouping fields in structures.
BPF
---
- Notify user space (via epoll) when a struct_ops object is getting
detached/unregistered.
- Add new kfuncs for a generic, open-coded bits iterator.
- Enable BPF programs to declare arrays of kptr, bpf_rb_root, and
bpf_list_head.
- Support resilient split BTF which cuts down on duplication and makes
BTF as compact as possible WRT BTF from modules.
- Add support for dumping kfunc prototypes from BTF which enables both
detecting as well as dumping compilable prototypes for kfuncs.
- riscv64 BPF JIT improvements in particular to add 12-argument support
for BPF trampolines and to utilize bpf_prog_pack for the latter.
- Add the capability to offload the netfilter flowtable in XDP layer
through kfuncs.
Driver API
----------
- Allow users to configure IRQ tresholds between which automatic IRQ
moderation can choose.
- Expand Power Sourcing (PoE) status with power, class and failure
reason. Support setting power limits.
- Track additional RSS contexts in the core, make sure configuration
changes don't break them.
- Support IPsec crypto offload for IPv6 ESP and IPv4 UDP-encapsulated ESP
data paths.
- Support updating firmware on SFP modules.
Tests and tooling
-----------------
- mptcp: use net/lib.sh to manage netns.
- TCP-AO and TCP-MD5: replace debug prints used by tests with
tracepoints.
- openvswitch: make test self-contained (don't depend on OvS CLI tools).
Drivers
-------
- Ethernet high-speed NICs:
- Broadcom (bnxt):
- increase the max total outstanding PTP TX packets to 4
- add timestamping statistics support
- implement netdev_queue_mgmt_ops
- support new RSS context API
- Intel (100G, ice, idpf):
- implement FEC statistics and dumping signal quality indicators
- support E825C products (with 56Gbps PHYs)
- nVidia/Mellanox:
- support HW-GRO
- mlx4/mlx5: support per-queue statistics via netlink
- obey the max number of EQs setting in sub-functions
- AMD/Solarflare:
- support new RSS context API
- AMD/Pensando:
- ionic: rework fix for doorbell miss to lower overhead
and skip it on new HW
- Wangxun:
- txgbe: support Flow Director perfect filters
- Ethernet NICs consumer, embedded and virtual:
- Add driver for Tehuti Networks TN40xx chips
- Add driver for Meta's internal NIC chips
- Add driver for Ethernet MAC on Airoha EN7581 SoCs
- Add driver for Renesas Ethernet-TSN devices
- Google cloud vNIC:
- flow steering support
- Microsoft vNIC:
- support page sizes other than 4KB on ARM64
- vmware vNIC:
- support latency measurement (update to version 9)
- VirtIO net:
- support for Byte Queue Limits
- support configuring thresholds for automatic IRQ moderation
- support for AF_XDP Rx zero-copy
- Synopsys (stmmac):
- support for STM32MP13 SoC
- let platforms select the right PCS implementation
- TI:
- icssg-prueth: add multicast filtering support
- icssg-prueth: enable PTP timestamping and PPS
- Renesas:
- ravb: improve Rx performance 30-400% by using page pool,
theaded NAPI and timer-based IRQ coalescing
- ravb: add MII support for R-Car V4M
- Cadence (macb):
- macb: add ARP support to Wake-On-LAN
- Cortina:
- use phylib for RX and TX pause configuration
- Ethernet switches:
- nVidia/Mellanox:
- support configuration of multipath hash seed
- report more accurate max MTU
- use page_pool to improve Rx performance
- MediaTek:
- mt7530: add support for bridge port isolation
- Qualcomm:
- qca8k: add support for bridge port isolation
- Microchip:
- lan9371/2: add 100BaseTX PHY support
- NXP:
- vsc73xx: implement VLAN operations
- Ethernet PHYs:
- aquantia: enable support for aqr115c
- aquantia: add support for PHY LEDs
- realtek: add support for rtl8224 2.5Gbps PHY
- xpcs: add memory-mapped device support
- add BroadR-Reach link mode and support in Broadcom's PHY driver
- CAN:
- add document for ISO 15765-2 protocol support
- mcp251xfd: workaround for erratum DS80000789E, use timestamps
to catch when device returns incorrect FIFO status
- WiFi:
- mac80211/cfg80211:
- parse Transmit Power Envelope (TPE) data in mac80211 instead of
in drivers
- improvements for 6 GHz regulatory flexibility
- multi-link improvements
- support multiple radios per wiphy
- remove DEAUTH_NEED_MGD_TX_PREP flag
- Intel (iwlwifi):
- bump FW API to 91 for BZ/SC devices
- report 64-bit radiotap timestamp
- enable P2P low latency by default
- handle Transmit Power Envelope (TPE) advertised by AP
- remove support for older FW for new devices
- fast resume (keeping the device configured)
- mvm: re-enable Multi-Link Operation (MLO)
- aggregation (A-MSDU) optimizations
- MediaTek (mt76):
- mt7925 Multi-Link Operation (MLO) support
- Qualcomm (ath10k):
- LED support for various chipsets
- Qualcomm (ath12k):
- remove unsupported Tx monitor handling
- support channel 2 in 6 GHz band
- support Spatial Multiplexing Power Save (SMPS) in 6 GHz band
- supprt multiple BSSID (MBSSID) and Enhanced Multi-BSSID
Advertisements (EMA)
- support dynamic VLAN
- add panic handler for resetting the firmware state
- DebugFS support for datapath statistics
- WCN7850: support for Wake on WLAN
- Microchip (wilc1000):
- read MAC address during probe to make it visible to user space
- suspend/resume improvements
- TI (wl18xx):
- support newer firmware versions
- RealTek (rtw89):
- preparation for RTL8852BE-VT support
- Wake on WLAN support for WiFi 6 chips
- 36-bit PCI DMA support
- RealTek (rtlwifi):
- RTL8192DU support
- Broadcom (brcmfmac):
- Management Frame Protection support (to enable WPA3)
- Bluetooth:
- qualcomm: use the power sequencer for QCA6390
- btusb: mediatek: add ISO data transmission functions
- hci_bcm4377: add BCM4388 support
- btintel: add support for BlazarU core
- btintel: add support for Whale Peak2
- btnxpuart: add support for AW693 A1 chipset
- btnxpuart: add support for IW615 chipset
- btusb: add Realtek RTL8852BE support ID 0x13d3:0x3591
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
-----BEGIN PGP SIGNATURE-----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=opz8
-----END PGP SIGNATURE-----
Merge tag 'net-next-6.11' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next
Pull networking updates from Jakub Kicinski:
"Not much excitement - a handful of large patchsets (devmem among them)
did not make it in time.
Core & protocols:
- Use local_lock in addition to local_bh_disable() to protect per-CPU
resources in networking, a step closer for local_bh_disable() not
to act as a big lock on PREEMPT_RT
- Use flex array for netdevice priv area, ensure its cache alignment
- Add a sysctl knob to allow user to specify a default rto_min at
socket init time. Bit of a big hammer but multiple companies were
independently carrying such patch downstream so clearly it's useful
- Support scheduling transmission of packets based on CLOCK_TAI
- Un-pin TCP TIMEWAIT timer to avoid it firing on CPUs later cordoned
off using cpusets
- Support multiple L2TPv3 UDP tunnels using the same 5-tuple address
- Allow configuration of multipath hash seed, to both allow
synchronizing hashing of two routers, and preventing partial
accidental sync
- Improve TCP compliance with RFC 9293 for simultaneous connect()
- Support sending NAT keepalives in IPsec ESP in UDP states.
Userspace IKE daemon had to do this before, but the kernel can
better keep track of it
- Support sending supervision HSR frames with MAC addresses stored in
ProxyNodeTable when RedBox (i.e. HSR-SAN) is enabled
- Introduce IPPROTO_SMC for selecting SMC when socket is created
- Allow UDP GSO transmit from devices with no checksum offload
- openvswitch: add packet sampling via psample, separating the
sampled traffic from "upcall" packets sent to user space for
forwarding
- nf_tables: shrink memory consumption for transaction objects
Things we sprinkled into general kernel code:
- Power Sequencing subsystem (used by Qualcomm Bluetooth driver for
QCA6390) [ Already merged separately - Linus ]
- Add IRQ information in sysfs for auxiliary bus
- Introduce guard definition for local_lock
- Add aligned flavor of __cacheline_group_{begin, end}() markings for
grouping fields in structures
BPF:
- Notify user space (via epoll) when a struct_ops object is getting
detached/unregistered
- Add new kfuncs for a generic, open-coded bits iterator
- Enable BPF programs to declare arrays of kptr, bpf_rb_root, and
bpf_list_head
- Support resilient split BTF which cuts down on duplication and
makes BTF as compact as possible WRT BTF from modules
- Add support for dumping kfunc prototypes from BTF which enables
both detecting as well as dumping compilable prototypes for kfuncs
- riscv64 BPF JIT improvements in particular to add 12-argument
support for BPF trampolines and to utilize bpf_prog_pack for the
latter
- Add the capability to offload the netfilter flowtable in XDP layer
through kfuncs
Driver API:
- Allow users to configure IRQ tresholds between which automatic IRQ
moderation can choose
- Expand Power Sourcing (PoE) status with power, class and failure
reason. Support setting power limits
- Track additional RSS contexts in the core, make sure configuration
changes don't break them
- Support IPsec crypto offload for IPv6 ESP and IPv4 UDP-encapsulated
ESP data paths
- Support updating firmware on SFP modules
Tests and tooling:
- mptcp: use net/lib.sh to manage netns
- TCP-AO and TCP-MD5: replace debug prints used by tests with
tracepoints
- openvswitch: make test self-contained (don't depend on OvS CLI
tools)
Drivers:
- Ethernet high-speed NICs:
- Broadcom (bnxt):
- increase the max total outstanding PTP TX packets to 4
- add timestamping statistics support
- implement netdev_queue_mgmt_ops
- support new RSS context API
- Intel (100G, ice, idpf):
- implement FEC statistics and dumping signal quality indicators
- support E825C products (with 56Gbps PHYs)
- nVidia/Mellanox:
- support HW-GRO
- mlx4/mlx5: support per-queue statistics via netlink
- obey the max number of EQs setting in sub-functions
- AMD/Solarflare:
- support new RSS context API
- AMD/Pensando:
- ionic: rework fix for doorbell miss to lower overhead and
skip it on new HW
- Wangxun:
- txgbe: support Flow Director perfect filters
- Ethernet NICs consumer, embedded and virtual:
- Add driver for Tehuti Networks TN40xx chips
- Add driver for Meta's internal NIC chips
- Add driver for Ethernet MAC on Airoha EN7581 SoCs
- Add driver for Renesas Ethernet-TSN devices
- Google cloud vNIC:
- flow steering support
- Microsoft vNIC:
- support page sizes other than 4KB on ARM64
- vmware vNIC:
- support latency measurement (update to version 9)
- VirtIO net:
- support for Byte Queue Limits
- support configuring thresholds for automatic IRQ moderation
- support for AF_XDP Rx zero-copy
- Synopsys (stmmac):
- support for STM32MP13 SoC
- let platforms select the right PCS implementation
- TI:
- icssg-prueth: add multicast filtering support
- icssg-prueth: enable PTP timestamping and PPS
- Renesas:
- ravb: improve Rx performance 30-400% by using page pool,
theaded NAPI and timer-based IRQ coalescing
- ravb: add MII support for R-Car V4M
- Cadence (macb):
- macb: add ARP support to Wake-On-LAN
- Cortina:
- use phylib for RX and TX pause configuration
- Ethernet switches:
- nVidia/Mellanox:
- support configuration of multipath hash seed
- report more accurate max MTU
- use page_pool to improve Rx performance
- MediaTek:
- mt7530: add support for bridge port isolation
- Qualcomm:
- qca8k: add support for bridge port isolation
- Microchip:
- lan9371/2: add 100BaseTX PHY support
- NXP:
- vsc73xx: implement VLAN operations
- Ethernet PHYs:
- aquantia: enable support for aqr115c
- aquantia: add support for PHY LEDs
- realtek: add support for rtl8224 2.5Gbps PHY
- xpcs: add memory-mapped device support
- add BroadR-Reach link mode and support in Broadcom's PHY driver
- CAN:
- add document for ISO 15765-2 protocol support
- mcp251xfd: workaround for erratum DS80000789E, use timestamps to
catch when device returns incorrect FIFO status
- WiFi:
- mac80211/cfg80211:
- parse Transmit Power Envelope (TPE) data in mac80211 instead
of in drivers
- improvements for 6 GHz regulatory flexibility
- multi-link improvements
- support multiple radios per wiphy
- remove DEAUTH_NEED_MGD_TX_PREP flag
- Intel (iwlwifi):
- bump FW API to 91 for BZ/SC devices
- report 64-bit radiotap timestamp
- enable P2P low latency by default
- handle Transmit Power Envelope (TPE) advertised by AP
- remove support for older FW for new devices
- fast resume (keeping the device configured)
- mvm: re-enable Multi-Link Operation (MLO)
- aggregation (A-MSDU) optimizations
- MediaTek (mt76):
- mt7925 Multi-Link Operation (MLO) support
- Qualcomm (ath10k):
- LED support for various chipsets
- Qualcomm (ath12k):
- remove unsupported Tx monitor handling
- support channel 2 in 6 GHz band
- support Spatial Multiplexing Power Save (SMPS) in 6 GHz band
- supprt multiple BSSID (MBSSID) and Enhanced Multi-BSSID
Advertisements (EMA)
- support dynamic VLAN
- add panic handler for resetting the firmware state
- DebugFS support for datapath statistics
- WCN7850: support for Wake on WLAN
- Microchip (wilc1000):
- read MAC address during probe to make it visible to user space
- suspend/resume improvements
- TI (wl18xx):
- support newer firmware versions
- RealTek (rtw89):
- preparation for RTL8852BE-VT support
- Wake on WLAN support for WiFi 6 chips
- 36-bit PCI DMA support
- RealTek (rtlwifi):
- RTL8192DU support
- Broadcom (brcmfmac):
- Management Frame Protection support (to enable WPA3)
- Bluetooth:
- qualcomm: use the power sequencer for QCA6390
- btusb: mediatek: add ISO data transmission functions
- hci_bcm4377: add BCM4388 support
- btintel: add support for BlazarU core
- btintel: add support for Whale Peak2
- btnxpuart: add support for AW693 A1 chipset
- btnxpuart: add support for IW615 chipset
- btusb: add Realtek RTL8852BE support ID 0x13d3:0x3591"
* tag 'net-next-6.11' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1589 commits)
eth: fbnic: Fix spelling mistake "tiggerring" -> "triggering"
tcp: Replace strncpy() with strscpy()
wifi: ath12k: fix build vs old compiler
tcp: Don't access uninit tcp_rsk(req)->ao_keyid in tcp_create_openreq_child().
eth: fbnic: Write the TCAM tables used for RSS control and Rx to host
eth: fbnic: Add L2 address programming
eth: fbnic: Add basic Rx handling
eth: fbnic: Add basic Tx handling
eth: fbnic: Add link detection
eth: fbnic: Add initial messaging to notify FW of our presence
eth: fbnic: Implement Rx queue alloc/start/stop/free
eth: fbnic: Implement Tx queue alloc/start/stop/free
eth: fbnic: Allocate a netdevice and napi vectors with queues
eth: fbnic: Add FW communication mechanism
eth: fbnic: Add message parsing for FW messages
eth: fbnic: Add register init to set PCIe/Ethernet device config
eth: fbnic: Allocate core device specific structures and devlink interface
eth: fbnic: Add scaffolding for Meta's NIC driver
PCI: Add Meta Platforms vendor ID
net/sched: cls_flower: propagate tca[TCA_OPTIONS] to NL_REQ_ATTR_CHECK
...
This KUnit next update for Linux 6.11-rc1 consists of:
-- adds vm_mmap() allocation resource manager
-- converts usercopy kselftest to KUnit
-- disables usercopy testing on !CONFIG_MMU
-- adds MODULE_DESCRIPTION() to core, list, and usercopy tests
-- adds tests for assertion formatting functions - assert.c
-- introduces KUNIT_ASSERT_MEMEQ and KUNIT_ASSERT_MEMNEQ macros
-- fixes KUNIT_ASSERT_STRNEQ comments to make it clear that it is
an assertion
-- renames KUNIT_ASSERT_FAILURE to KUNIT_FAIL_AND_ABORT
-----BEGIN PGP SIGNATURE-----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=nnFR
-----END PGP SIGNATURE-----
Merge tag 'linux_kselftest-kunit-6.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest
Pull KUnit updates from Shuah Khan:
- add vm_mmap() allocation resource manager
- convert usercopy kselftest to KUnit
- disable usercopy testing on !CONFIG_MMU
- add MODULE_DESCRIPTION() to core, list, and usercopy tests
- add tests for assertion formatting functions - assert.c
- introduce KUNIT_ASSERT_MEMEQ and KUNIT_ASSERT_MEMNEQ macros
- fix KUNIT_ASSERT_STRNEQ comments to make it clear that it is an
assertion
- rename KUNIT_ASSERT_FAILURE to KUNIT_FAIL_AND_ABORT
* tag 'linux_kselftest-kunit-6.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest:
kunit: Introduce KUNIT_ASSERT_MEMEQ and KUNIT_ASSERT_MEMNEQ macros
kunit: Rename KUNIT_ASSERT_FAILURE to KUNIT_FAIL_AND_ABORT for readability
kunit: Fix the comment of KUNIT_ASSERT_STRNEQ as assertion
kunit: executor: Simplify string allocation handling
kunit/usercopy: Add missing MODULE_DESCRIPTION()
kunit/usercopy: Disable testing on !CONFIG_MMU
usercopy: Convert test_user_copy to KUnit test
kunit: test: Add vm_mmap() allocation resource manager
list: test: add the missing MODULE_DESCRIPTION() macro
kunit: add missing MODULE_DESCRIPTION() macros to core modules
list: test: remove unused struct 'klist_test_struct'
kunit: Cover 'assert.c' with tests
Summary
* Remove "->procname == NULL" check when iterating through sysctl table arrays
Removing sentinels in ctl_table arrays reduces the build time size and
runtime memory consumed by ~64 bytes per array. With all ctl_table
sentinels gone, the additional check for ->procname == NULL that worked in
tandem with the ARRAY_SIZE to calculate the size of the ctl_table arrays is
no longer needed and has been removed. The sysctl register functions now
returns an error if a sentinel is used.
* Preparation patches for sysctl constification
Constifying ctl_table structs prevents the modification of proc_handler
function pointers as they would reside in .rodata. The ctl_table arguments
in sysctl utility functions are const qualified in preparation for a future
treewide proc_handler argument constification commit.
* Misc fixes
Increase robustness of set_ownership by providing sane default ownership
values in case the callee doesn't set them. Bound check proc_dou8vec_minmax
to avoid loading buggy modules and give sysctl testing module a name to
avoid compiler complaints.
Testing
* This got push to linux-next in v6.10-rc2, so it has had more than a month
of testing
-----BEGIN PGP SIGNATURE-----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=bs2G
-----END PGP SIGNATURE-----
Merge tag 'sysctl-6.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/sysctl/sysctl
Pull sysctl updates from Joel Granados:
- Remove "->procname == NULL" check when iterating through sysctl table
arrays
Removing sentinels in ctl_table arrays reduces the build time size
and runtime memory consumed by ~64 bytes per array. With all
ctl_table sentinels gone, the additional check for ->procname == NULL
that worked in tandem with the ARRAY_SIZE to calculate the size of
the ctl_table arrays is no longer needed and has been removed. The
sysctl register functions now returns an error if a sentinel is used.
- Preparation patches for sysctl constification
Constifying ctl_table structs prevents the modification of
proc_handler function pointers as they would reside in .rodata. The
ctl_table arguments in sysctl utility functions are const qualified
in preparation for a future treewide proc_handler argument
constification commit.
- Misc fixes
Increase robustness of set_ownership by providing sane default
ownership values in case the callee doesn't set them. Bound check
proc_dou8vec_minmax to avoid loading buggy modules and give sysctl
testing module a name to avoid compiler complaints.
* tag 'sysctl-6.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/sysctl/sysctl:
sysctl: Warn on an empty procname element
sysctl: Remove ctl_table sentinel code comments
sysctl: Remove "child" sysctl code comments
sysctl: Remove superfluous empty allocations from sysctl internals
sysctl: Replace nr_entries with ctl_table_size in new_links
sysctl: Remove check for sentinel element in ctl_table arrays
mm profiling: Remove superfluous sentinel element from ctl_table
locking: Remove superfluous sentinel element from kern_lockdep_table
sysctl: Add module description to sysctl-testing
sysctl: constify ctl_table arguments of utility function
utsname: constify ctl_table arguments of utility function
sysctl: move the extra1/2 boundary check of u8 to sysctl_check_table_array
sysctl: always initialize i_uid/i_gid
- Core:
- Make the takeover of a hrtimer based broadcast timer reliable during
CPU hot-unplug. The current implementation suffers from a race which
can lead to broadcast timer starvation in the worst case.
- VDSO related cleanups and simplifications
- Small cleanups and enhancements all over the place
- PTP:
- Replace the architecture specific base clock to clocksource, e.g. ART
to TSC, conversion function with generic functionality to avoid
exposing such internals to drivers and convert all existing drivers
over. This also allows to provide functionality which converts the
other way round in the core code based on the same parameter set.
- Provide a function to convert CLOCK_REALTIME to the base clock to
support the upcoming PPS output driver on Intel platforms.
- Drivers:
- A set of Device Tree bindings for new hardware
- Cleanups and enhancements all over the place
-----BEGIN PGP SIGNATURE-----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=8GjP
-----END PGP SIGNATURE-----
Merge tag 'timers-core-2024-07-14' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull timer updates from Thomas Gleixner:
"Updates for timers, timekeeping and related functionality:
Core:
- Make the takeover of a hrtimer based broadcast timer reliable
during CPU hot-unplug. The current implementation suffers from a
race which can lead to broadcast timer starvation in the worst
case.
- VDSO related cleanups and simplifications
- Small cleanups and enhancements all over the place
PTP:
- Replace the architecture specific base clock to clocksource, e.g.
ART to TSC, conversion function with generic functionality to avoid
exposing such internals to drivers and convert all existing drivers
over. This also allows to provide functionality which converts the
other way round in the core code based on the same parameter set.
- Provide a function to convert CLOCK_REALTIME to the base clock to
support the upcoming PPS output driver on Intel platforms.
Drivers:
- A set of Device Tree bindings for new hardware
- Cleanups and enhancements all over the place"
* tag 'timers-core-2024-07-14' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (30 commits)
clocksource/drivers/realtek: Add timer driver for rtl-otto platforms
dt-bindings: timer: Add schema for realtek,otto-timer
dt-bindings: timer: Add SOPHGO SG2002 clint
dt-bindings: timer: renesas,tmu: Add R-Car Gen2 support
dt-bindings: timer: renesas,tmu: Add RZ/G1 support
dt-bindings: timer: renesas,tmu: Add R-Mobile APE6 support
clocksource/drivers/mips-gic-timer: Correct sched_clock width
clocksource/drivers/mips-gic-timer: Refine rating computation
clocksource/drivers/sh_cmt: Address race condition for clock events
clocksource/driver/arm_global_timer: Remove unnecessary ‘0’ values from err
clocksource/drivers/arm_arch_timer: Remove unnecessary ‘0’ values from irq
tick/broadcast: Make takeover of broadcast hrtimer reliable
tick/sched: Combine WARN_ON_ONCE and print_once
x86/vdso: Remove unused include
x86/vgtod: Remove unused typedef gtod_long_t
x86/vdso: Fix function reference in comment
vdso: Add comment about reason for vdso struct ordering
vdso/gettimeofday: Clarify comment about open coded function
timekeeping: Add missing kernel-doc function comments
tick: Remove unnused tick_nohz_get_idle_calls()
...
debug variables so that KCSAN ignores them.
-----BEGIN PGP SIGNATURE-----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=PuR2
-----END PGP SIGNATURE-----
Merge tag 'core-debugobjects-2024-07-14' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull debugobjects update from Thomas Gleixner:
"A single update for debugobjects to annotate all intentionally racy
global debug variables so that KCSAN ignores them"
* tag 'core-debugobjects-2024-07-14' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
debugobjects: Annotate racy debug variables
- Make scripts/ld-version.sh robust against the latest LLD
- Fix warnings in rpm-pkg with device tree support
- Fix warnings in fortify tests with KASAN
-----BEGIN PGP SIGNATURE-----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=MMw8
-----END PGP SIGNATURE-----
Merge tag 'kbuild-fixes-v6.10-4' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild
Pull Kbuild fixes from Masahiro Yamada:
- Make scripts/ld-version.sh robust against the latest LLD
- Fix warnings in rpm-pkg with device tree support
- Fix warnings in fortify tests with KASAN
* tag 'kbuild-fixes-v6.10-4' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild:
fortify: fix warnings in fortify tests with KASAN
kbuild: rpm-pkg: avoid the warnings with dtb's listed twice
kbuild: Make ld-version.sh more robust against version string changes
When a software KASAN mode is enabled, the fortify tests emit warnings
on some architectures.
For example, for ARCH=arm, the combination of CONFIG_FORTIFY_SOURCE=y
and CONFIG_KASAN=y produces the following warnings:
TEST lib/test_fortify/read_overflow-memchr.log
warning: unsafe memchr() usage lacked '__read_overflow' warning in lib/test_fortify/read_overflow-memchr.c
TEST lib/test_fortify/read_overflow-memchr_inv.log
warning: unsafe memchr_inv() usage lacked '__read_overflow' symbol in lib/test_fortify/read_overflow-memchr_inv.c
TEST lib/test_fortify/read_overflow-memcmp.log
warning: unsafe memcmp() usage lacked '__read_overflow' warning in lib/test_fortify/read_overflow-memcmp.c
TEST lib/test_fortify/read_overflow-memscan.log
warning: unsafe memscan() usage lacked '__read_overflow' symbol in lib/test_fortify/read_overflow-memscan.c
TEST lib/test_fortify/read_overflow2-memcmp.log
warning: unsafe memcmp() usage lacked '__read_overflow2' warning in lib/test_fortify/read_overflow2-memcmp.c
[ more and more similar warnings... ]
Commit 9c2d1328f8 ("kbuild: provide reasonable defaults for tool
coverage") removed KASAN flags from non-kernel objects by default.
It was an intended behavior because lib/test_fortify/*.c are unit
tests that are not linked to the kernel.
As it turns out, some architectures require -fsanitize=kernel-(hw)address
to define __SANITIZE_ADDRESS__ for the fortify tests.
Without __SANITIZE_ADDRESS__ defined, arch/arm/include/asm/string.h
defines __NO_FORTIFY, thus excluding <linux/fortify-string.h>.
This issue does not occur on x86 thanks to commit 4ec4190be4
("kasan, x86: don't rename memintrinsics in uninstrumented files"),
but there are still some architectures that define __NO_FORTIFY
in such a situation.
Set KASAN_SANITIZE=y explicitly to the fortify tests.
Fixes: 9c2d1328f8 ("kbuild: provide reasonable defaults for tool coverage")
Reported-by: Arnd Bergmann <arnd@arndb.de>
Closes: https://lore.kernel.org/all/0e8dee26-41cc-41ae-9493-10cd1a8e3268@app.fastmail.com/
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
initialized in the code path anyway right after on the ARM arch
timer and the ARM global timer (Li kunyu)
- Fix a race condition in the interrupt leading to a deadlock on the
SH CMT driver. Note that this fix was not tested on the platform
using this timer but the fix seems reasonable enough to be picked
confidently (Niklas Söderlund)
- Increase the rating of the gic-timer and use the configured width
clocksource register on the MIPS architecture (Jiaxun Yang)
- Add the DT bindings for the TMU on the Renesas platforms (Geert
Uytterhoeven)
- Add the DT bindings for the SOPHGO SG2002 clint on RiscV (Thomas
Bonnefille)
- Add the rtl-otto timer driver along with the DT bindings for the
Realtek platform (Chris Packham)
-----BEGIN PGP SIGNATURE-----
iQEzBAABCAAdFiEEGn3N4YVz0WNVyHskqDIjiipP6E8FAmaRQh0ACgkQqDIjiipP
6E+rfQgAqkAWZ9BjswxV8Fg+Hj+a1cSohKjDczqitQF5rJm25X5VvMwlXVa3XQGm
yemh4tKPpll02LOiYCTyqOWzNrkVS9VsoBd5rrYjRX5aSv7UD35EXklLj4P/INwX
O9CRGD6aK4Xbw66xxheYHSSh+2iRs2x2mq61+/VdcIBlAwpQo+vx7McRoJZZI+2t
NFIXw8RF5dDlmmAaqiB0WnPAtcOK3SDo9fu1LEAX1ZAzvbZriLo7XLnL7ibySWVe
BW1n7Ore6PN5Dvz7jMfTsOQsgAlVv6MPfp/s4EDqMfBLVqXNirzXrdhiee/ahnYP
vyzQyU5HPCMiIYS45mhJF0OyDd3wyw==
=wuYA
-----END PGP SIGNATURE-----
Merge tag 'timers-v6.11-rc1' of https://git.linaro.org/people/daniel.lezcano/linux into timers/core
Pull clocksource/event driver updates from Daniel Lezcano:
- Remove unnecessary local variables initialization as they will be
initialized in the code path anyway right after on the ARM arch
timer and the ARM global timer (Li kunyu)
- Fix a race condition in the interrupt leading to a deadlock on the
SH CMT driver. Note that this fix was not tested on the platform
using this timer but the fix seems reasonable enough to be picked
confidently (Niklas Söderlund)
- Increase the rating of the gic-timer and use the configured width
clocksource register on the MIPS architecture (Jiaxun Yang)
- Add the DT bindings for the TMU on the Renesas platforms (Geert
Uytterhoeven)
- Add the DT bindings for the SOPHGO SG2002 clint on RiscV (Thomas
Bonnefille)
- Add the rtl-otto timer driver along with the DT bindings for the
Realtek platform (Chris Packham)
Link: https://lore.kernel.org/all/91cd05de-4c5d-4242-a381-3b8a4fe6a2a2@linaro.org
We checked that "nlimbs" is non-zero in the outside if statement so delete
the duplicate check here.
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Reviewed-by: Tianjia Zhang <tianjia.zhang@linux.alibaba.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Use the swap() macro to simplify the functions solve_linear_system() and
gf_poly_gcd() and improve their readability. Remove the local variable
tmp.
Fixes the following three Coccinelle/coccicheck warnings reported by
swap.cocci:
WARNING opportunity for swap()
WARNING opportunity for swap()
WARNING opportunity for swap()
Link: https://lkml.kernel.org/r/20240708224023.9312-2-thorsten.blum@toblux.com
Signed-off-by: Thorsten Blum <thorsten.blum@toblux.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Replace commas between expression statements with semicolons.
Link: https://lkml.kernel.org/r/20240709034323.586185-1-nichen@iscas.ac.cn
Signed-off-by: Chen Ni <nichen@iscas.ac.cn>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Andrii Nakryiko <andrii@kernel.org>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Eduard Zingerman <eddyz87@gmail.com>
Cc: Hao Luo <haoluo@google.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: John Fastabend <john.fastabend@gmail.com>
Cc: KP Singh <kpsingh@kernel.org>
Cc: Martin KaFai Lau <martin.lau@linux.dev>
Cc: Song Liu <song@kernel.org>
Cc: Stanislav Fomichev <sdf@fomichev.me>
Cc: Yonghong Song <yonghong.song@linux.dev>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
The alloc/copy code pattern is better consolidated to single kstrdup (and
kstrndup) calls instead. This gets rid of deprecated[1] strncpy() uses as
well. Replace one other strncpy() use with the more idiomatic strscpy().
Link: https://github.com/KSPP/linux/issues/90 [1]
Reviewed-by: David Gow <davidgow@google.com>
Signed-off-by: Kees Cook <kees@kernel.org>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
The header file linux/bootconfig.h is included whether __KERNEL__ is
defined or not.
Include it only once before the #ifdef/#else/#endif preprocessor
directives and remove the following make includecheck warning:
linux/bootconfig.h is included more than once
Move the comment to the top and delete the now empty #else block.
Link: https://lore.kernel.org/all/20240711084315.1507-1-thorsten.blum@toblux.com/
Signed-off-by: Thorsten Blum <thorsten.blum@toblux.com>
Signed-off-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Cross-merge networking fixes after downstream PR.
Conflicts:
net/sched/act_ct.c
26488172b0 ("net/sched: Fix UAF when resolving a clash")
3abbd7ed8b ("act_ct: prepare for stolen verdict coming from conntrack and nat engine")
No adjacent changes.
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
No identifiable theme here - all are singleton patches, 19 are for MM.
-----BEGIN PGP SIGNATURE-----
iHUEABYKAB0WIQTTMBEPP41GrTpTJgfdBJ7gKXxAjgUCZo7tTQAKCRDdBJ7gKXxA
jvhZAP977PnAwQH5khIS3xJxZrqx/+Tho7UPZzQPvHJPRpHorAD/TZfDazGtlPMD
uLPEVslh18rks/w+kddLrnlBnkpUMwY=
=vhts
-----END PGP SIGNATURE-----
Merge tag 'mm-hotfixes-stable-2024-07-10-13-19' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
Pull misc fixes from Andrew Morton:
"21 hotfixes, 15 of which are cc:stable.
No identifiable theme here - all are singleton patches, 19 are for MM"
* tag 'mm-hotfixes-stable-2024-07-10-13-19' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (21 commits)
mm/hugetlb: fix kernel NULL pointer dereference when migrating hugetlb folio
mm/hugetlb: fix potential race in __update_and_free_hugetlb_folio()
filemap: replace pte_offset_map() with pte_offset_map_nolock()
arch/xtensa: always_inline get_current() and current_thread_info()
sched.h: always_inline alloc_tag_{save|restore} to fix modpost warnings
MAINTAINERS: mailmap: update Lorenzo Stoakes's email address
mm: fix crashes from deferred split racing folio migration
lib/build_OID_registry: avoid non-destructive substitution for Perl < 5.13.2 compat
mm: gup: stop abusing try_grab_folio
nilfs2: fix kernel bug on rename operation of broken directory
mm/hugetlb_vmemmap: fix race with speculative PFN walkers
cachestat: do not flush stats in recency check
mm/shmem: disable PMD-sized page cache if needed
mm/filemap: skip to create PMD-sized page cache if needed
mm/readahead: limit page cache size in page_cache_ra_order()
mm/filemap: make MAX_PAGECACHE_ORDER acceptable to xarray
mm/damon/core: merge regions aggressively when max_nr_regions is unmet
Fix userfaultfd_api to return EINVAL as expected
mm: vmalloc: check if a hash-index is in cpu_possible_mask
mm: prevent derefencing NULL ptr in pfn_section_valid()
...
