Commit Graph

882737 Commits

Author SHA1 Message Date
Nathan Chancellor
589b72894f xen/blkfront: Adjust indentation in xlvbd_alloc_gendisk
Clang warns:

../drivers/block/xen-blkfront.c:1117:4: warning: misleading indentation;
statement is not part of the previous 'if' [-Wmisleading-indentation]
                nr_parts = PARTS_PER_DISK;
                ^
../drivers/block/xen-blkfront.c:1115:3: note: previous statement is here
                if (err)
                ^

This is because there is a space at the beginning of this line; remove
it so that the indentation is consistent according to the Linux kernel
coding style and clang no longer warns.

While we are here, the previous line has some trailing whitespace; clean
that up as well.

Fixes: c80a420995 ("xen-blkfront: handle Xen major numbers other than XENVBD")
Link: https://github.com/ClangBuiltLinux/linux/issues/791
Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
Reviewed-by: Juergen Gross <jgross@suse.com>
Acked-by: Roger Pau Monné <roger.pau@citrix.com>
Signed-off-by: Juergen Gross <jgross@suse.com>
2019-12-20 13:38:13 +01:00
Juergen Gross
c673ec61ad xen/balloon: fix ballooned page accounting without hotplug enabled
When CONFIG_XEN_BALLOON_MEMORY_HOTPLUG is not defined
reserve_additional_memory() will set balloon_stats.target_pages to a
wrong value in case there are still some ballooned pages allocated via
alloc_xenballooned_pages().

This will result in balloon_process() no longer be triggered when
ballooned pages are freed in batches.

Reported-by: Nicholas Tsirakis <niko.tsirakis@gmail.com>
Signed-off-by: Juergen Gross <jgross@suse.com>
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Signed-off-by: Juergen Gross <jgross@suse.com>
2019-12-13 08:39:52 +01:00
Paul Durrant
fa2ac657f9 xen-blkback: prevent premature module unload
Objects allocated by xen_blkif_alloc come from the 'blkif_cache' kmem
cache. This cache is destoyed when xen-blkif is unloaded so it is
necessary to wait for the deferred free routine used for such objects to
complete. This necessity was missed in commit 14855954f6 "xen-blkback:
allow module to be cleanly unloaded". This patch fixes the problem by
taking/releasing extra module references in xen_blkif_alloc/free()
respectively.

Signed-off-by: Paul Durrant <pdurrant@amazon.com>
Reviewed-by: Roger Pau Monné <roger.pau@citrix.com>
Signed-off-by: Juergen Gross <jgross@suse.com>
2019-12-13 08:34:06 +01:00
Paul Durrant
14855954f6 xen-blkback: allow module to be cleanly unloaded
Add a module_exit() to perform the necessary clean-up.

Signed-off-by: Paul Durrant <pdurrant@amazon.com>
Reviewed-by: "Roger Pau Monné" <roger.pau@citrix.com>
Reviewed-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Juergen Gross <jgross@suse.com>
2019-12-04 11:35:35 +01:00
Paul Durrant
196748a276 xen/xenbus: reference count registered modules
To prevent a PV driver module being removed whilst attached to its other
end, and hence xenbus calling into potentially invalid text, take a
reference on the module before calling the probe() method (dropping it if
unsuccessful) and drop the reference after returning from the remove()
method.

Suggested-by: Jan Beulich <jbeulich@suse.com>
Signed-off-by: Paul Durrant <pdurrant@amazon.com>
Reviewed-by: Jan Beulich <jbeulich@suse.com>
Reviewed-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Juergen Gross <jgross@suse.com>
2019-12-04 11:35:32 +01:00
Juergen Gross
b3f7931f5c xen/gntdev: switch from kcalloc() to kvcalloc()
With sufficient many pages to map gntdev can reach order 9 allocation
sizes. As there is no need to have physically contiguous buffers switch
to kvcalloc() in order to avoid failing allocations.

Signed-off-by: Juergen Gross <jgross@suse.com>
Reviewed-by: Oleksandr Andrushchenko <oleksandr_andrushchenko@epam.com>
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Signed-off-by: Juergen Gross <jgross@suse.com>
2019-12-02 07:39:23 +01:00
Juergen Gross
3b06ac6707 xen/gntdev: replace global limit of mapped pages by limit per call
Today there is a global limit of pages mapped via /dev/xen/gntdev set
to 1 million pages per default. There is no reason why that limit is
existing, as total number of grant mappings is limited by the
hypervisor anyway and preferring kernel mappings over userspace ones
doesn't make sense. It should be noted that the gntdev device is
usable by root only.

Additionally checking of that limit is fragile, as the number of pages
to map via one call is specified in a 32-bit unsigned variable which
isn't tested to stay within reasonable limits (the only test is the
value to be <= zero, which basically excludes only calls without any
mapping requested). So trying to map e.g. 0xffff0000 pages while
already nearly 1000000 pages are mapped will effectively lower the
global number of mapped pages such that a parallel call mapping a
reasonable amount of pages can succeed in spite of the global limit
being violated.

So drop the global limit and introduce per call limit instead. This
per call limit (default: 65536 grant mappings) protects against
allocating insane large arrays in the kernel for doing a hypercall
which will fail anyway in case a user is e.g. trying to map billions
of pages.

Signed-off-by: Juergen Gross <jgross@suse.com>
Reviewed-by: Oleksandr Andrushchenko <oleksandr_andrushchenko@epam.com>
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Signed-off-by: Juergen Gross <jgross@suse.com>
2019-12-02 07:39:18 +01:00
Colin Ian King
d41b26d81a xen/gntdev: remove redundant non-zero check on ret
The non-zero check on ret is always going to be false because
ret was initialized as zero and the only place it is set to
non-zero contains a return path before the non-zero check. Hence
the check is redundant and can be removed.

[ jgross@suse.com: limit scope of ret ]

Addresses-Coverity: ("Logically dead code")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Reviewed-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Juergen Gross <jgross@suse.com>
2019-12-02 07:27:43 +01:00
Juergen Gross
348be43384 xen/events: remove event handling recursion detection
__xen_evtchn_do_upcall() contains guards against being called
recursively. This mechanism was introduced in the early pvops times
(kernel 2.6.26) when there were all the Xen backend drivers missing
from the upstream kernel, and some of those out-of-tree drivers were
enabling interrupts in their event handlers (which was explicitly
allowed in the initial XenoLinux).

Nowadays we don't need to support those old drivers any more and the
capability to allow recursive calls of __xen_evtchn_do_upcall() can
be removed.

Signed-off-by: Juergen Gross <jgross@suse.com>
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Signed-off-by: Juergen Gross <jgross@suse.com>
2019-12-02 07:04:30 +01:00
Linus Torvalds
b94ae8ad9f seccomp updates for v5.5
- implement SECCOMP_USER_NOTIF_FLAG_CONTINUE (Christian Brauner)
 - fixes to selftests (Christian Brauner)
 - remove secure_computing() argument (Christian Brauner)
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Merge tag 'seccomp-v5.5-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux

Pull seccomp updates from Kees Cook:
 "Mostly this is implementing the new flag SECCOMP_USER_NOTIF_FLAG_CONTINUE,
  but there are cleanups as well.

   - implement SECCOMP_USER_NOTIF_FLAG_CONTINUE (Christian Brauner)

   - fixes to selftests (Christian Brauner)

   - remove secure_computing() argument (Christian Brauner)"

* tag 'seccomp-v5.5-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux:
  seccomp: rework define for SECCOMP_USER_NOTIF_FLAG_CONTINUE
  seccomp: fix SECCOMP_USER_NOTIF_FLAG_CONTINUE test
  seccomp: simplify secure_computing()
  seccomp: test SECCOMP_USER_NOTIF_FLAG_CONTINUE
  seccomp: add SECCOMP_USER_NOTIF_FLAG_CONTINUE
  seccomp: avoid overflow in implicit constant conversion
2019-11-30 17:23:16 -08:00
Linus Torvalds
3b805ca177 audit/stable-5.5 PR 20191126
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Merge tag 'audit-pr-20191126' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/audit

Pull audit updates from Paul Moore:
 "Audit is back for v5.5, albeit with only two patches:

   - Allow for the auditing of suspicious O_CREAT usage via the new
     AUDIT_ANOM_CREAT record.

   - Remove a redundant if-conditional check found during code analysis.
     It's a minor change, but when the pull request is only two patches
     long, you need filler in the pull request email"

[ Heh on the pull request filler. I wish more people tried to write
  better pull request messages, even if maybe it's not worth it for the
  trivial cases ;^)   - Linus ]

* tag 'audit-pr-20191126' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/audit:
  audit: remove redundant condition check in kauditd_thread()
  audit: Report suspicious O_CREAT usage
2019-11-30 17:01:48 -08:00
Linus Torvalds
ba75082efc selinux/stable-5.5 PR 20191126
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Merge tag 'selinux-pr-20191126' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/selinux

Pull selinux updates from Paul Moore:
 "Only three SELinux patches for v5.5:

   - Remove the size limit on SELinux policies, the limitation was a
     lingering vestige and no longer necessary.

   - Allow file labeling before the policy is loaded. This should ease
     some of the burden when the policy is initially loaded (no need to
     relabel files), but it should also help enable some new system
     concepts which dynamically create the root filesystem in the
     initrd.

   - Add support for the "greatest lower bound" policy construct which
     is defined as the intersection of the MLS range of two SELinux
     labels"

* tag 'selinux-pr-20191126' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/selinux:
  selinux: default_range glblub implementation
  selinux: allow labeling before policy is loaded
  selinux: remove load size limit
2019-11-30 16:55:37 -08:00
Linus Torvalds
8a99117f6e kgdb patches for 5.5-rc1
The major change here is the work from Douglas Anderson that
 reworks the way kdb stack traces are handled on SMP systems.
 The effect is to allow all CPUs to issue their stack trace which
 reduced the need for architecture specific code to support stack
 tracing.
 
 Also included are general of clean ups from Doug and myself:
 
  * Remove some unused variables or arguments.
  * Tidy up the kdb escape handling code and fix a couple of odd
    corner cases.
  - Better ignore escape characters that do not form part of an
    escape sequence. This mostly benefits vi users since they are most
    likely to press escape as a nervous habit but it won't harm anyone
    else.
 
 Signed-off-by: Daniel Thompson <daniel.thompson@linaro.org>
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Merge tag 'kgdb-5.5-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/danielt/linux

Pull kgdb updates from Daniel Thompson:
 "The major change here is the work from Douglas Anderson that reworks
  the way kdb stack traces are handled on SMP systems. The effect is to
  allow all CPUs to issue their stack trace which reduced the need for
  architecture specific code to support stack tracing.

  Also included are general of clean ups from Doug and myself:

   - Remove some unused variables or arguments.

   - Tidy up the kdb escape handling code and fix a couple of odd corner
     cases.

   - Better ignore escape characters that do not form part of an escape
     sequence. This mostly benefits vi users since they are most likely
     to press escape as a nervous habit but it won't harm anyone else"

* tag 'kgdb-5.5-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/danielt/linux:
  kdb: Tweak escape handling for vi users
  kdb: Improve handling of characters from different input sources
  kdb: Remove special case logic from kdb_read()
  kdb: Simplify code to fetch characters from console
  kdb: Tidy up code to handle escape sequences
  kdb: Avoid array subscript warnings on non-SMP builds
  kdb: Fix stack crawling on 'running' CPUs that aren't the master
  kdb: Fix "btc <cpu>" crash if the CPU didn't round up
  kdb: Remove unused "argcount" param from kdb_bt1(); make btaprompt bool
  kgdb: Remove unused DCPU_SSTEP definition
2019-11-30 16:41:55 -08:00
Linus Torvalds
0dd0c8f7db - Support for new VMBus protocols (Andrea Parri).
- Hibernation support (Dexuan Cui).
 - Latency testing framework (Branden Bonaby).
 - Decoupling Hyper-V page size from guest page size (Himadri Pandya).
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Merge tag 'hyperv-next-signed' of git://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux

Pull Hyper-V updates from Sasha Levin:

 - support for new VMBus protocols (Andrea Parri)

 - hibernation support (Dexuan Cui)

 - latency testing framework (Branden Bonaby)

 - decoupling Hyper-V page size from guest page size (Himadri Pandya)

* tag 'hyperv-next-signed' of git://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux: (22 commits)
  Drivers: hv: vmbus: Fix crash handler reset of Hyper-V synic
  drivers/hv: Replace binary semaphore with mutex
  drivers: iommu: hyperv: Make HYPERV_IOMMU only available on x86
  HID: hyperv: Add the support of hibernation
  hv_balloon: Add the support of hibernation
  x86/hyperv: Implement hv_is_hibernation_supported()
  Drivers: hv: balloon: Remove dependencies on guest page size
  Drivers: hv: vmbus: Remove dependencies on guest page size
  x86: hv: Add function to allocate zeroed page for Hyper-V
  Drivers: hv: util: Specify ring buffer size using Hyper-V page size
  Drivers: hv: Specify receive buffer size using Hyper-V page size
  tools: hv: add vmbus testing tool
  drivers: hv: vmbus: Introduce latency testing
  video: hyperv: hyperv_fb: Support deferred IO for Hyper-V frame buffer driver
  video: hyperv: hyperv_fb: Obtain screen resolution from Hyper-V host
  hv_netvsc: Add the support of hibernation
  hv_sock: Add the support of hibernation
  video: hyperv_fb: Add the support of hibernation
  scsi: storvsc: Add the support of hibernation
  Drivers: hv: vmbus: Add module parameter to cap the VMBus version
  ...
2019-11-30 14:50:51 -08:00
Linus Torvalds
8fa91bfa9b Merge branch 'ras-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull RAS fix from Borislav Petkov:
 "One urgent fix for the thermal throttling machinery: the recent change
  reworking the thermal notifications forgot to mask out read-only and
  reserved bits in the thermal status MSRs, leading to exceptions while
  writing those MSRs.

  The fix takes care of masking out those bits first"

* 'ras-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/mce/therm_throt: Mask out read-only and reserved MSR bits
2019-11-30 14:49:08 -08:00
Linus Torvalds
738d5fabff Merge branch 'parisc-5.5-1' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux
Pull parisc updates from Helge Deller:
 "Just trivial small updates: An assembler register optimization in the
  inlined networking checksum functions, a compiler warning fix and
  don't unneccesary print a runtime warning on machines which wouldn't
  be affected anyway"

* 'parisc-5.5-1' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux:
  parisc: Avoid spurious inequivalent alias kernel error messages
  kexec: Fix pointer-to-int-cast warnings
  parisc: Do not hardcode registers in checksum functions
2019-11-30 14:45:32 -08:00
Linus Torvalds
7794b1d418 powerpc updates for 5.5
Highlights:
 
  - Infrastructure for secure boot on some bare metal Power9 machines. The
    firmware support is still in development, so the code here won't actually
    activate secure boot on any existing systems.
 
  - A change to xmon (our crash handler / pseudo-debugger) to restrict it to
    read-only mode when the kernel is lockdown'ed, otherwise it's trivial to drop
    into xmon and modify kernel data, such as the lockdown state.
 
  - Support for KASLR on 32-bit BookE machines (Freescale / NXP).
 
  - Fixes for our flush_icache_range() and __kernel_sync_dicache() (VDSO) to work
    with memory ranges >4GB.
 
  - Some reworks of the pseries CMM (Cooperative Memory Management) driver to
    make it behave more like other balloon drivers and enable some cleanups of
    generic mm code.
 
  - A series of fixes to our hardware breakpoint support to properly handle
    unaligned watchpoint addresses.
 
 Plus a bunch of other smaller improvements, fixes and cleanups.
 
 Thanks to:
   Alastair D'Silva, Andrew Donnellan, Aneesh Kumar K.V, Anthony Steinhauser,
   Cédric Le Goater, Chris Packham, Chris Smart, Christophe Leroy, Christopher M.
   Riedl, Christoph Hellwig, Claudio Carvalho, Daniel Axtens, David Hildenbrand,
   Deb McLemore, Diana Craciun, Eric Richter, Geert Uytterhoeven, Greg
   Kroah-Hartman, Greg Kurz, Gustavo L. F. Walbon, Hari Bathini, Harish, Jason
   Yan, Krzysztof Kozlowski, Leonardo Bras, Mathieu Malaterre, Mauro S. M.
   Rodrigues, Michal Suchanek, Mimi Zohar, Nathan Chancellor, Nathan Lynch, Nayna
   Jain, Nick Desaulniers, Oliver O'Halloran, Qian Cai, Rasmus Villemoes, Ravi
   Bangoria, Sam Bobroff, Santosh Sivaraj, Scott Wood, Thomas Huth, Tyrel
   Datwyler, Vaibhav Jain, Valentin Longchamp, YueHaibing.
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Merge tag 'powerpc-5.5-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux

Pull powerpc updates from Michael Ellerman:
 "Highlights:

   - Infrastructure for secure boot on some bare metal Power9 machines.
     The firmware support is still in development, so the code here
     won't actually activate secure boot on any existing systems.

   - A change to xmon (our crash handler / pseudo-debugger) to restrict
     it to read-only mode when the kernel is lockdown'ed, otherwise it's
     trivial to drop into xmon and modify kernel data, such as the
     lockdown state.

   - Support for KASLR on 32-bit BookE machines (Freescale / NXP).

   - Fixes for our flush_icache_range() and __kernel_sync_dicache()
     (VDSO) to work with memory ranges >4GB.

   - Some reworks of the pseries CMM (Cooperative Memory Management)
     driver to make it behave more like other balloon drivers and enable
     some cleanups of generic mm code.

   - A series of fixes to our hardware breakpoint support to properly
     handle unaligned watchpoint addresses.

  Plus a bunch of other smaller improvements, fixes and cleanups.

  Thanks to: Alastair D'Silva, Andrew Donnellan, Aneesh Kumar K.V,
  Anthony Steinhauser, Cédric Le Goater, Chris Packham, Chris Smart,
  Christophe Leroy, Christopher M. Riedl, Christoph Hellwig, Claudio
  Carvalho, Daniel Axtens, David Hildenbrand, Deb McLemore, Diana
  Craciun, Eric Richter, Geert Uytterhoeven, Greg Kroah-Hartman, Greg
  Kurz, Gustavo L. F. Walbon, Hari Bathini, Harish, Jason Yan, Krzysztof
  Kozlowski, Leonardo Bras, Mathieu Malaterre, Mauro S. M. Rodrigues,
  Michal Suchanek, Mimi Zohar, Nathan Chancellor, Nathan Lynch, Nayna
  Jain, Nick Desaulniers, Oliver O'Halloran, Qian Cai, Rasmus Villemoes,
  Ravi Bangoria, Sam Bobroff, Santosh Sivaraj, Scott Wood, Thomas Huth,
  Tyrel Datwyler, Vaibhav Jain, Valentin Longchamp, YueHaibing"

* tag 'powerpc-5.5-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: (144 commits)
  powerpc/fixmap: fix crash with HIGHMEM
  x86/efi: remove unused variables
  powerpc: Define arch_is_kernel_initmem_freed() for lockdep
  powerpc/prom_init: Use -ffreestanding to avoid a reference to bcmp
  powerpc: Avoid clang warnings around setjmp and longjmp
  powerpc: Don't add -mabi= flags when building with Clang
  powerpc: Fix Kconfig indentation
  powerpc/fixmap: don't clear fixmap area in paging_init()
  selftests/powerpc: spectre_v2 test must be built 64-bit
  powerpc/powernv: Disable native PCIe port management
  powerpc/kexec: Move kexec files into a dedicated subdir.
  powerpc/32: Split kexec low level code out of misc_32.S
  powerpc/sysdev: drop simple gpio
  powerpc/83xx: map IMMR with a BAT.
  powerpc/32s: automatically allocate BAT in setbat()
  powerpc/ioremap: warn on early use of ioremap()
  powerpc: Add support for GENERIC_EARLY_IOREMAP
  powerpc/fixmap: Use __fix_to_virt() instead of fix_to_virt()
  powerpc/8xx: use the fixmapped IMMR in cpm_reset()
  powerpc/8xx: add __init to cpm1 init functions
  ...
2019-11-30 14:35:43 -08:00
Linus Torvalds
9dd0013824 ARM updates for 5.5-rc:
- improve ARM implementation of pfn_valid()
 - various sparse fixes
 - spelling fixes
 - add further ARMv8 debug architecture versions
 - clang fix for decompressor
 - update to generic vDSO
 - remove Brahma-B53 from spectre hardening
 - initialise broadcast hrtimer device
 - use correct nm executable in decompressor
 - remove old mcount et.al.
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Merge tag 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm

Pull ARM updates from Russell King:

 - improve ARM implementation of pfn_valid()

 - various sparse fixes

 - spelling fixes

 - add further ARMv8 debug architecture versions

 - clang fix for decompressor

 - update to generic vDSO

 - remove Brahma-B53 from spectre hardening

 - initialise broadcast hrtimer device

 - use correct nm executable in decompressor

 - remove old mcount et.al.

* tag 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm: (26 commits)
  ARM: 8940/1: ftrace: remove mcount(),ftrace_caller_old() and ftrace_call_old()
  ARM: 8939/1: kbuild: use correct nm executable
  ARM: 8938/1: kernel: initialize broadcast hrtimer based clock event device
  ARM: 8937/1: spectre-v2: remove Brahma-B53 from hardening
  ARM: 8933/1: replace Sun/Solaris style flag on section directive
  ARM: 8932/1: Add clock_gettime64 entry point
  ARM: 8931/1: Add clock_getres entry point
  ARM: 8930/1: Add support for generic vDSO
  ARM: 8929/1: use APSR_nzcv instead of r15 as mrc operand
  ARM: 8927/1: ARM/hw_breakpoint: add more ARMv8 debug architecture versions support
  ARM: 8918/2: only build return_address() if needed
  ARM: 8928/1: ARM_ERRATA_775420: Spelling s/date/data/
  ARM: 8925/1: tcm: include <asm/tcm.h> for missing declarations
  ARM: 8924/1: tcm: make dtcm_end and itcm_end static
  ARM: 8923/1: mm: include <asm/vga.h> for vga_base
  ARM: 8922/1: parse_dt_topology() rate is pointer to __be32
  ARM: 8920/1: share get_signal_page from signal.c to process.c
  ARM: 8919/1: make unexported functions static
  ARM: 8917/1: mm: include <asm/set_memory.h>
  ARM: 8916/1: mm: make set_section_perms() static
  ...
2019-11-30 14:29:19 -08:00
Linus Torvalds
2309d07682 nds32 patches for 5.5-rc1
Here is the nds32 patchset based on 5.4-rc8
 Contained in here are
 1. code clean up
 2. add a nds32 maintainer
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Merge tag 'nds32-for-linus-5.5-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/greentime/linux

Pull nds32 updates from Greentime Hu:

 - code clean up

 - add a nds32 maintainer

* tag 'nds32-for-linus-5.5-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/greentime/linux:
  MAINTAINERS: add nds32 maintainer
  nds32: Move static keyword to the front of declaration
  nds32: Fix typo in Kconfig.cpu
  nds32: remove unneeded clean-files for DTB
2019-11-30 14:28:11 -08:00
Linus Torvalds
6a965666b7 Pipework for general notification queue
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Merge tag 'notifications-pipe-prep-20191115' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs

Pull pipe rework from David Howells:
 "This is my set of preparatory patches for building a general
  notification queue on top of pipes. It makes a number of significant
  changes:

   - It removes the nr_exclusive argument from __wake_up_sync_key() as
     this is always 1. This prepares for the next step:

   - Adds wake_up_interruptible_sync_poll_locked() so that poll can be
     woken up from a function that's holding the poll waitqueue
     spinlock.

   - Change the pipe buffer ring to be managed in terms of unbounded
     head and tail indices rather than bounded index and length. This
     means that reading the pipe only needs to modify one index, not
     two.

   - A selection of helper functions are provided to query the state of
     the pipe buffer, plus a couple to apply updates to the pipe
     indices.

   - The pipe ring is allowed to have kernel-reserved slots. This allows
     many notification messages to be spliced in by the kernel without
     allowing userspace to pin too many pages if it writes to the same
     pipe.

   - Advance the head and tail indices inside the pipe waitqueue lock
     and use wake_up_interruptible_sync_poll_locked() to poke poll
     without having to take the lock twice.

   - Rearrange pipe_write() to preallocate the buffer it is going to
     write into and then drop the spinlock. This allows kernel
     notifications to then be added the ring whilst it is filling the
     buffer it allocated. The read side is stalled because the pipe
     mutex is still held.

   - Don't wake up readers on a pipe if there was already data in it
     when we added more.

   - Don't wake up writers on a pipe if the ring wasn't full before we
     removed a buffer"

* tag 'notifications-pipe-prep-20191115' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs:
  pipe: Remove sync on wake_ups
  pipe: Increase the writer-wakeup threshold to reduce context-switch count
  pipe: Check for ring full inside of the spinlock in pipe_write()
  pipe: Remove redundant wakeup from pipe_write()
  pipe: Rearrange sequence in pipe_write() to preallocate slot
  pipe: Conditionalise wakeup in pipe_read()
  pipe: Advance tail pointer inside of wait spinlock in pipe_read()
  pipe: Allow pipes to have kernel-reserved slots
  pipe: Use head and tail pointers for the ring, not cursor and length
  Add wake_up_interruptible_sync_poll_locked()
  Remove the nr_exclusive argument from __wake_up_sync_key()
  pipe: Reduce #inclusion of pipe_fs_i.h
2019-11-30 14:12:13 -08:00
Linus Torvalds
32ef955363 \n
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Merge tag 'fsnotify_for_v5.5-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs

Pull fsnotify updates from Jan Kara:
 "Three fsnotify cleanups"

* tag 'fsnotify_for_v5.5-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs:
  fsnotify: Add git tree reference to MAINTAINERS
  fsnotify/fdinfo: exportfs_encode_inode_fh() takes pointer as 4th argument
  fsnotify: move declaration of fsnotify_mark_connector_cachep to fsnotify.h
2019-11-30 11:34:33 -08:00
Linus Torvalds
b8072d5b3c \n
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Merge tag 'for_v5.5-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs

Pull ext2, quota, reiserfs cleanups and fixes from Jan Kara:

 - Refactor the quota on/off kernel internal interfaces (mostly for
   ubifs quota support as ubifs does not want to have inodes holding
   quota information)

 - A few other small quota fixes and cleanups

 - Various small ext2 fixes and cleanups

 - Reiserfs xattr fix and one cleanup

* tag 'for_v5.5-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs: (28 commits)
  ext2: code cleanup for descriptor_loc()
  fs/quota: handle overflows of sysctl fs.quota.* and report as unsigned long
  ext2: fix improper function comment
  ext2: code cleanup for ext2_try_to_allocate()
  ext2: skip unnecessary operations in ext2_try_to_allocate()
  ext2: Simplify initialization in ext2_try_to_allocate()
  ext2: code cleanup by calling ext2_group_last_block_no()
  ext2: introduce new helper ext2_group_last_block_no()
  reiserfs: replace open-coded atomic_dec_and_mutex_lock()
  ext2: check err when partial != NULL
  quota: Handle quotas without quota inodes in dquot_get_state()
  quota: Make dquot_disable() work without quota inodes
  quota: Drop dquot_enable()
  fs: Use dquot_load_quota_inode() from filesystems
  quota: Rename vfs_load_quota_inode() to dquot_load_quota_inode()
  quota: Simplify dquot_resume()
  quota: Factor out setup of quota inode
  quota: Check that quota is not dirty before release
  quota: fix livelock in dquot_writeback_dquots
  ext2: don't set *count in the case of failure in ext2_try_to_allocate()
  ...
2019-11-30 11:16:07 -08:00
Linus Torvalds
e2d73c302b Updates since last change:
- Introduce superblock checksum support;
 - Set iowait when waiting I/O for sync decompression path;
 - Several code cleanups.
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Merge tag 'erofs-for-5.5-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs

Pull erofs updates from Gao Xiang:
 "No major kernel updates for this round since I'm fully diving into
  LZMA algorithm internals now to provide high CR XZ algorihm support.
  That needs more work and time for me to get a better compression time.

  Summary:

   - Introduce superblock checksum support

   - Set iowait when waiting I/O for sync decompression path

   - Several code cleanups"

* tag 'erofs-for-5.5-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs:
  erofs: remove unnecessary output in erofs_show_options()
  erofs: drop all vle annotations for runtime names
  erofs: support superblock checksum
  erofs: set iowait for sync decompression
  erofs: clean up decompress queue stuffs
  erofs: get rid of __stagingpage_alloc helper
  erofs: remove dead code since managed cache is now built-in
  erofs: clean up collection handling routines
2019-11-30 11:13:33 -08:00
Linus Torvalds
21b26d2679 Various smb3 fixes (including 12 for stable) and also features (addition of multichannel support)
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Merge tag '5.5-rc-smb3-fixes' of git://git.samba.org/sfrench/cifs-2.6

Pull cifs updates from Steve French:
 "Various smb3 fixes (including 12 for stable) and also features
  (addition of multichannel support)"

* tag '5.5-rc-smb3-fixes' of git://git.samba.org/sfrench/cifs-2.6: (41 commits)
  CIFS: fix a white space issue in cifs_get_inode_info()
  cifs: update internal module version number
  cifs: Always update signing key of first channel
  cifs: Fix retrieval of DFS referrals in cifs_mount()
  cifs: Fix potential softlockups while refreshing DFS cache
  cifs: Fix lookup of root ses in DFS referral cache
  cifs: Fix use-after-free bug in cifs_reconnect()
  cifs: dump channel info in DebugData
  smb3: dump in_send and num_waiters stats counters by default
  cifs: try harder to open new channels
  CIFS: Properly process SMB3 lease breaks
  cifs: move cifsFileInfo_put logic into a work-queue
  cifs: try opening channels after mounting
  CIFS: refactor cifs_get_inode_info()
  cifs: switch servers depending on binding state
  cifs: add server param
  cifs: add multichannel mount options and data structs
  cifs: sort interface list by speed
  CIFS: Fix SMB2 oplock break processing
  cifs: don't use 'pre:' for MODULE_SOFTDEP
  ...
2019-11-30 11:10:39 -08:00
Linus Torvalds
8f45533e9d f2fs-for-5.5-rc1
In this round, we've introduced fairly small number of patches as below.
 
 Enhancement:
  - improve the in-place-update IO flow
  - allocate segment to guarantee no GC for pinned files
 
 Bug fix:
  - fix updatetime in lazytime mode
  - potential memory leak in f2fs_listxattr
  - record parent inode number in rename2 correctly
  - fix deadlock in f2fs_gc along with atomic writes
  - avoid needless data migration in GC
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Merge tag 'f2fs-for-5.5' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs

Pull f2fs updates from Jaegeuk Kim:
 "In this round, we've introduced fairly small number of patches as below.

  Enhancements:
   - improve the in-place-update IO flow
   - allocate segment to guarantee no GC for pinned files

  Bug fixes:
   - fix updatetime in lazytime mode
   - potential memory leak in f2fs_listxattr
   - record parent inode number in rename2 correctly
   - fix deadlock in f2fs_gc along with atomic writes
   - avoid needless data migration in GC"

* tag 'f2fs-for-5.5' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs:
  f2fs: stop GC when the victim becomes fully valid
  f2fs: expose main_blkaddr in sysfs
  f2fs: choose hardlimit when softlimit is larger than hardlimit in f2fs_statfs_project()
  f2fs: Fix deadlock in f2fs_gc() context during atomic files handling
  f2fs: show f2fs instance in printk_ratelimited
  f2fs: fix potential overflow
  f2fs: fix to update dir's i_pino during cross_rename
  f2fs: support aligned pinned file
  f2fs: avoid kernel panic on corruption test
  f2fs: fix wrong description in document
  f2fs: cache global IPU bio
  f2fs: fix to avoid memory leakage in f2fs_listxattr
  f2fs: check total_segments from devices in raw_super
  f2fs: update multi-dev metadata in resize_fs
  f2fs: mark recovery flag correctly in read_raw_super_block()
  f2fs: fix to update time in lazytime mode
2019-11-30 11:02:30 -08:00
Linus Torvalds
4a55d362ff AFS development
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Merge tag 'afs-next-20191121' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs

Pull AFS updates from David Howells:
 "Minor cleanups and fix:

   - Minor fix to make some debugging statements display information
     from the correct iov_iter.

   - Rename some members and variables to make things more obvious or
     consistent.

   - Provide a helper to wrap increments of the usage count on the
     afs_read struct.

   - Use scnprintf() to print into a stack buffer rather than sprintf().

   - Remove some set but unused variables"

* tag 'afs-next-20191121' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs:
  afs: Remove set but not used variable 'ret'
  afs: Remove set but not used variables 'before', 'after'
  afs: xattr: use scnprintf
  afs: Introduce an afs_get_read() refcount helper
  afs: Rename desc -> req in afs_fetch_data()
  afs: Switch the naming of call->iter and call->_iter
  afs: Use call->_iter not &call->iter in debugging statements
2019-11-30 10:57:22 -08:00
Linus Torvalds
50b8b3f85a This merge window saw the the following new featuers added to ext4:
* Direct I/O via iomap (required the iomap-for-next branch from Darrick
    as a prereq).
  * Support for using dioread-nolock where the block size < page size.
  * Support for encryption for file systems where the block size < page size.
  * Rework of journal credits handling so a revoke-heavy workload will
    not cause the journal to run out of space.
  * Replace bit-spinlocks with spinlocks in jbd2
 
 Also included were some bug fixes and cleanups, mostly to clean up
 corner cases from fuzzed file systems and error path handling.
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Merge tag 'ext4_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4

Pull ext4 updates from Ted Ts'o:
 "This merge window saw the the following new featuers added to ext4:

   - Direct I/O via iomap (required the iomap-for-next branch from
     Darrick as a prereq).

   - Support for using dioread-nolock where the block size < page size.

   - Support for encryption for file systems where the block size < page
     size.

   - Rework of journal credits handling so a revoke-heavy workload will
     not cause the journal to run out of space.

   - Replace bit-spinlocks with spinlocks in jbd2

  Also included were some bug fixes and cleanups, mostly to clean up
  corner cases from fuzzed file systems and error path handling"

* tag 'ext4_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4: (59 commits)
  ext4: work around deleting a file with i_nlink == 0 safely
  ext4: add more paranoia checking in ext4_expand_extra_isize handling
  jbd2: make jbd2_handle_buffer_credits() handle reserved handles
  ext4: fix a bug in ext4_wait_for_tail_page_commit
  ext4: bio_alloc with __GFP_DIRECT_RECLAIM never fails
  ext4: code cleanup for get_next_id
  ext4: fix leak of quota reservations
  ext4: remove unused variable warning in parse_options()
  ext4: Enable encryption for subpage-sized blocks
  fs/buffer.c: support fscrypt in block_read_full_page()
  ext4: Add error handling for io_end_vec struct allocation
  jbd2: Fine tune estimate of necessary descriptor blocks
  jbd2: Provide trace event for handle restarts
  ext4: Reserve revoke credits for freed blocks
  jbd2: Make credit checking more strict
  jbd2: Rename h_buffer_credits to h_total_credits
  jbd2: Reserve space for revoke descriptor blocks
  jbd2: Drop jbd2_space_needed()
  jbd2: Account descriptor blocks into t_outstanding_credits
  jbd2: Factor out common parts of stopping and restarting a handle
  ...
2019-11-30 10:53:02 -08:00
Linus Torvalds
f112a2fd1f New code for 5.5:
- Fix another place in the splice code where a pipe could ask a
 filesystem for a longer read than the pipe actually has free buffer
 space.
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Merge tag 'vfs-5.5-merge-1' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux

Pull splice fix from Darrick Wong:
 "Fix another place in the splice code where a pipe could ask a
  filesystem for a longer read than the pipe actually has free buffer
  space"

* tag 'vfs-5.5-merge-1' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux:
  splice: only read in as much information as there is pipe buffer space
2019-11-30 10:48:24 -08:00
Linus Torvalds
3b266a52d8 New code for 5.5:
- Make iomap_dio_rw callers explicitly tell us if they want us to wait
 - Port the xfs writeback code to iomap to complete the buffered io
   library functions
 - Refactor the unshare code to share common pieces
 - Add support for performing copy on write with buffered writes
 - Other minor fixes
 - Fix unchecked return in iomap_bmap
 - Fix a type casting bug in a ternary statement in iomap_dio_bio_actor
 - Improve tracepoints for easier diagnostic ability
 - Fix pipe page leakage in directio reads
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Merge tag 'iomap-5.5-merge-11' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux

Pull iomap updates from Darrick Wong:
 "In this release, we hoisted as much of XFS' writeback code into iomap
  as was practicable, refactored the unshare file data function, added
  the ability to perform buffered io copy on write, and tweaked various
  parts of the directio implementation as needed to port ext4's directio
  code (that will be a separate pull).

  Summary:

   - Make iomap_dio_rw callers explicitly tell us if they want us to
     wait

   - Port the xfs writeback code to iomap to complete the buffered io
     library functions

   - Refactor the unshare code to share common pieces

   - Add support for performing copy on write with buffered writes

   - Other minor fixes

   - Fix unchecked return in iomap_bmap

   - Fix a type casting bug in a ternary statement in
     iomap_dio_bio_actor

   - Improve tracepoints for easier diagnostic ability

   - Fix pipe page leakage in directio reads"

* tag 'iomap-5.5-merge-11' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux: (31 commits)
  iomap: Fix pipe page leakage during splicing
  iomap: trace iomap_appply results
  iomap: fix return value of iomap_dio_bio_actor on 32bit systems
  iomap: iomap_bmap should check iomap_apply return value
  iomap: Fix overflow in iomap_page_mkwrite
  fs/iomap: remove redundant check in iomap_dio_rw()
  iomap: use a srcmap for a read-modify-write I/O
  iomap: renumber IOMAP_HOLE to 0
  iomap: use write_begin to read pages to unshare
  iomap: move the zeroing case out of iomap_read_page_sync
  iomap: ignore non-shared or non-data blocks in xfs_file_dirty
  iomap: always use AOP_FLAG_NOFS in iomap_write_begin
  iomap: remove the unused iomap argument to __iomap_write_end
  iomap: better document the IOMAP_F_* flags
  iomap: enhance writeback error message
  iomap: pass a struct page to iomap_finish_page_writeback
  iomap: cleanup iomap_ioend_compare
  iomap: move struct iomap_page out of iomap.h
  iomap: warn on inline maps in iomap_writepage_map
  iomap: lift the xfs writeback code to iomap
  ...
2019-11-30 10:44:49 -08:00
Linus Torvalds
aa32f11691 hmm related patches for 5.5
This is another round of bug fixing and cleanup. This time the focus is on
 the driver pattern to use mmu notifiers to monitor a VA range. This code
 is lifted out of many drivers and hmm_mirror directly into the
 mmu_notifier core and written using the best ideas from all the driver
 implementations.
 
 This removes many bugs from the drivers and has a very pleasing
 diffstat. More drivers can still be converted, but that is for another
 cycle.
 
 - A shared branch with RDMA reworking the RDMA ODP implementation
 
 - New mmu_interval_notifier API. This is focused on the use case of
   monitoring a VA and simplifies the process for drivers
 
 - A common seq-count locking scheme built into the mmu_interval_notifier
   API usable by drivers that call get_user_pages() or hmm_range_fault()
   with the VA range
 
 - Conversion of mlx5 ODP, hfi1, radeon, nouveau, AMD GPU, and Xen GntDev
   drivers to the new API. This deletes a lot of wonky driver code.
 
 - Two improvements for hmm_range_fault(), from testing done by Ralph
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Merge tag 'for-linus-hmm' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma

Pull hmm updates from Jason Gunthorpe:
 "This is another round of bug fixing and cleanup. This time the focus
  is on the driver pattern to use mmu notifiers to monitor a VA range.
  This code is lifted out of many drivers and hmm_mirror directly into
  the mmu_notifier core and written using the best ideas from all the
  driver implementations.

  This removes many bugs from the drivers and has a very pleasing
  diffstat. More drivers can still be converted, but that is for another
  cycle.

   - A shared branch with RDMA reworking the RDMA ODP implementation

   - New mmu_interval_notifier API. This is focused on the use case of
     monitoring a VA and simplifies the process for drivers

   - A common seq-count locking scheme built into the
     mmu_interval_notifier API usable by drivers that call
     get_user_pages() or hmm_range_fault() with the VA range

   - Conversion of mlx5 ODP, hfi1, radeon, nouveau, AMD GPU, and Xen
     GntDev drivers to the new API. This deletes a lot of wonky driver
     code.

   - Two improvements for hmm_range_fault(), from testing done by Ralph"

* tag 'for-linus-hmm' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma:
  mm/hmm: remove hmm_range_dma_map and hmm_range_dma_unmap
  mm/hmm: make full use of walk_page_range()
  xen/gntdev: use mmu_interval_notifier_insert
  mm/hmm: remove hmm_mirror and related
  drm/amdgpu: Use mmu_interval_notifier instead of hmm_mirror
  drm/amdgpu: Use mmu_interval_insert instead of hmm_mirror
  drm/amdgpu: Call find_vma under mmap_sem
  nouveau: use mmu_interval_notifier instead of hmm_mirror
  nouveau: use mmu_notifier directly for invalidate_range_start
  drm/radeon: use mmu_interval_notifier_insert
  RDMA/hfi1: Use mmu_interval_notifier_insert for user_exp_rcv
  RDMA/odp: Use mmu_interval_notifier_insert()
  mm/hmm: define the pre-processor related parts of hmm.h even if disabled
  mm/hmm: allow hmm_range to be used with a mmu_interval_notifier or hmm_mirror
  mm/mmu_notifier: add an interval tree notifier
  mm/mmu_notifier: define the header pre-processor parts even if disabled
  mm/hmm: allow snapshot of the special zero page
2019-11-30 10:33:14 -08:00
Linus Torvalds
d5bb349dbb mm + drm coherent memory support for vmwgfx
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Merge tag 'drm-vmwgfx-coherent-2019-11-29' of git://anongit.freedesktop.org/drm/drm

Pull drm coherent memory support for vmwgfx from Dave Airlie:
 "This is a separate pull for the mm pagewalking + drm/vmwgfx work
  Thomas did and you were involved in, I've left it separate in case you
  don't feel as comfortable with it as the other stuff.

  It has mm acks/r-b in the right places from what I can see"

* tag 'drm-vmwgfx-coherent-2019-11-29' of git://anongit.freedesktop.org/drm/drm:
  drm/vmwgfx: Add surface dirty-tracking callbacks
  drm/vmwgfx: Implement an infrastructure for read-coherent resources
  drm/vmwgfx: Use an RBtree instead of linked list for MOB resources
  drm/vmwgfx: Implement an infrastructure for write-coherent resources
  mm: Add write-protect and clean utilities for address space ranges
  mm: Add a walk_page_mapping() function to the pagewalk code
  mm: pagewalk: Take the pagetable lock in walk_pte_range()
  mm: Remove BUG_ON mmap_sem not held from xxx_trans_huge_lock()
  drm/ttm: Convert vm callbacks to helpers
  drm/ttm: Remove explicit typecasts of vm_private_data
2019-11-30 09:38:11 -08:00
Christophe Leroy
2807273f5e powerpc/fixmap: fix crash with HIGHMEM
Commit f2bb86937d ("powerpc/fixmap: don't clear fixmap area in
paging_init()") removed the clearing of fixmap area in order to
avoid clearing fixmapped areas set earlier.

However unlike all other users of fixmap which use __set_fixmap(),
HIGHMEM functions directly use __set_pte_at(). This means
the page table must pre-exist, otherwise the following crash
can be encoutered due to the lack of entry in the PGD.

Oops: Kernel access of bad area, sig: 11 [#1]
BE PAGE_SIZE=4K MMU=Hash PowerMac
Modules linked in:
CPU: 0 PID: 1 Comm: swapper Not tainted 5.4.0+ #2528
NIP:  c0144ce8 LR: c0144ccc CTR: 00000080
REGS: ef0b5aa0 TRAP: 0300   Not tainted  (5.4.0+)
MSR:  00009032 <EE,ME,IR,DR,RI>  CR: 44282842  XER: 00000000
DAR: fffdf000 DSISR: 42000000
GPR00: c0144ccc ef0b5b58 ef0b0000 fffdf000 fffdf000 00000000 c0000f7c 00000000
GPR08: c0833000 fffdf000 00000000 ef1c53c9 24042842 00000000 00000000 00000000
GPR16: 00000000 00000000 ef7e7358 effe8160 00000000 c08a9660 c0851644 00000004
GPR24: c08c70a8 00002dc2 00000000 00000001 00000201 effe8160 effe8160 00000000
NIP [c0144ce8] prep_new_page+0x138/0x178
LR [c0144ccc] prep_new_page+0x11c/0x178
Call Trace:
[ef0b5b58] [c0144ccc] prep_new_page+0x11c/0x178 (unreliable)
[ef0b5b88] [c0147218] get_page_from_freelist+0x1fc/0xd88
[ef0b5c38] [c0148328] __alloc_pages_nodemask+0xd4/0xbb4
[ef0b5cf8] [c0142ba8] __vmalloc_node_range+0x1b4/0x2e0
[ef0b5d38] [c0142dd0] vzalloc+0x48/0x58
[ef0b5d58] [c0301c8c] check_partition+0x58/0x244
[ef0b5d78] [c02ffe80] blk_add_partitions+0x44/0x2cc
[ef0b5db8] [c01a32d8] bdev_disk_changed+0x68/0xfc
[ef0b5de8] [c01a4494] __blkdev_get+0x290/0x460
[ef0b5e28] [c02fdd40] __device_add_disk+0x480/0x4d8
[ef0b5e68] [c0810688] brd_init+0xc0/0x188
[ef0b5e88] [c0005194] do_one_initcall+0x40/0x19c
[ef0b5ee8] [c07dd4dc] kernel_init_freeable+0x164/0x230
[ef0b5f28] [c0005408] kernel_init+0x18/0x10c
[ef0b5f38] [c0014274] ret_from_kernel_thread+0x14/0x1c

Partially revert that commit to still clear the fixmap area dedicated
to HIGHMEM.

Fixes: f2bb86937d ("powerpc/fixmap: don't clear fixmap area in paging_init()")
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/d42fa9747df5afa41e67b08e374c98d3b40529c9.1574927918.git.christophe.leroy@c-s.fr
2019-11-29 22:41:15 +11:00
YueHaibing
6f090192f8 x86/efi: remove unused variables
commit ad723674d6 ("x86/efi: move common keyring handler functions
to new file") leave this unused.

Fixes: ad723674d6 ("x86/efi: move common keyring handler functions to new file")
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Link: https://lore.kernel.org/r/20191115130830.13320-1-yuehaibing@huawei.com
2019-11-29 22:23:46 +11:00
Srinivas Pandruvada
5a43b87b3c x86/mce/therm_throt: Mask out read-only and reserved MSR bits
While writing to MSR IA32_THERM_STATUS/IA32_PKG_THERM_STATUS, avoid
writing 1 to read only and reserved fields because updating some fields
generates exception.

 [ bp: Vertically align for better readability. ]

Fixes: f6656208f0 ("x86/mce/therm_throt: Optimize notifications of thermal throttle")
Reported-by: Dominik Brodowski <linux@dominikbrodowski.net>
Tested-by: Dominik Brodowski <linux@dominikbrodowski.net>
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: linux-edac <linux-edac@vger.kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Tony Luck <tony.luck@intel.com>
Cc: x86-ml <x86@kernel.org>
Link: https://lkml.kernel.org/r/20191128150824.22413-1-srinivas.pandruvada@linux.intel.com
2019-11-29 09:17:52 +01:00
Linus Torvalds
81b6b96475 dma-mapping updates for 5.5-rc1
- improve dma-debug scalability (Eric Dumazet)
  - tiny dma-debug cleanup (Dan Carpenter)
  - check for vmap memory in dma_map_single (Kees Cook)
  - check for dma_addr_t overflows in dma-direct when using
    DMA offsets (Nicolas Saenz Julienne)
  - switch the x86 sta2x11 SOC to use more generic DMA code
    (Nicolas Saenz Julienne)
  - fix arm-nommu dma-ranges handling (Vladimir Murzin)
  - use __initdata in CMA (Shyam Saini)
  - replace the bus dma mask with a limit (Nicolas Saenz Julienne)
  - merge the remapping helpers into the main dma-direct flow (me)
  - switch xtensa to the generic dma remap handling (me)
  - various cleanups around dma_capable (me)
  - remove unused dev arguments to various dma-noncoherent helpers (me)
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Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux; tag 'dma-mapping-5.5' of git://git.infradead.org/users/hch/dma-mapping

Pull dma-mapping updates from Christoph Hellwig:

 - improve dma-debug scalability (Eric Dumazet)

 - tiny dma-debug cleanup (Dan Carpenter)

 - check for vmap memory in dma_map_single (Kees Cook)

 - check for dma_addr_t overflows in dma-direct when using DMA offsets
   (Nicolas Saenz Julienne)

 - switch the x86 sta2x11 SOC to use more generic DMA code (Nicolas
   Saenz Julienne)

 - fix arm-nommu dma-ranges handling (Vladimir Murzin)

 - use __initdata in CMA (Shyam Saini)

 - replace the bus dma mask with a limit (Nicolas Saenz Julienne)

 - merge the remapping helpers into the main dma-direct flow (me)

 - switch xtensa to the generic dma remap handling (me)

 - various cleanups around dma_capable (me)

 - remove unused dev arguments to various dma-noncoherent helpers (me)

* 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux:

* tag 'dma-mapping-5.5' of git://git.infradead.org/users/hch/dma-mapping: (22 commits)
  dma-mapping: treat dev->bus_dma_mask as a DMA limit
  dma-direct: exclude dma_direct_map_resource from the min_low_pfn check
  dma-direct: don't check swiotlb=force in dma_direct_map_resource
  dma-debug: clean up put_hash_bucket()
  powerpc: remove support for NULL dev in __phys_to_dma / __dma_to_phys
  dma-direct: avoid a forward declaration for phys_to_dma
  dma-direct: unify the dma_capable definitions
  dma-mapping: drop the dev argument to arch_sync_dma_for_*
  x86/PCI: sta2x11: use default DMA address translation
  dma-direct: check for overflows on 32 bit DMA addresses
  dma-debug: increase HASH_SIZE
  dma-debug: reorder struct dma_debug_entry fields
  xtensa: use the generic uncached segment support
  dma-mapping: merge the generic remapping helpers into dma-direct
  dma-direct: provide mmap and get_sgtable method overrides
  dma-direct: remove the dma_handle argument to __dma_direct_alloc_pages
  dma-direct: remove __dma_direct_free_pages
  usb: core: Remove redundant vmap checks
  kernel: dma-contiguous: mark CMA parameters __initdata/__initconst
  dma-debug: add a schedule point in debug_dma_dump_mappings()
  ...
2019-11-28 11:16:43 -08:00
Linus Torvalds
a308a71022 generic ioremap support
- clean up various obsolete ioremap and iounmap variants
  - add a new generic ioremap implementation and switch csky, nds32 and
    riscv over to it
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Merge tag 'ioremap-5.5' of git://git.infradead.org/users/hch/ioremap

Pull generic ioremap support from Christoph Hellwig:
 "This adds the remaining bits for an entirely generic ioremap and
  iounmap to lib/ioremap.c. To facilitate that, it cleans up the giant
  mess of weird ioremap variants we had with no users outside the arch
  code.

  For now just the three newest ports use the code, but there is more
  than a handful others that can be converted without too much work.

  Summary:

   - clean up various obsolete ioremap and iounmap variants

   - add a new generic ioremap implementation and switch csky, nds32 and
     riscv over to it"

* tag 'ioremap-5.5' of git://git.infradead.org/users/hch/ioremap: (21 commits)
  nds32: use generic ioremap
  csky: use generic ioremap
  csky: remove ioremap_cache
  riscv: use the generic ioremap code
  lib: provide a simple generic ioremap implementation
  sh: remove __iounmap
  nios2: remove __iounmap
  hexagon: remove __iounmap
  m68k: rename __iounmap and mark it static
  arch: rely on asm-generic/io.h for default ioremap_* definitions
  asm-generic: don't provide ioremap for CONFIG_MMU
  asm-generic: ioremap_uc should behave the same with and without MMU
  xtensa: clean up ioremap
  x86: Clean up ioremap()
  parisc: remove __ioremap
  nios2: remove __ioremap
  alpha: remove the unused __ioremap wrapper
  hexagon: clean up ioremap
  ia64: rename ioremap_nocache to ioremap_uc
  unicore32: remove ioremap_cached
  ...
2019-11-28 10:57:12 -08:00
Linus Torvalds
05bd375b6b for-5.5/io_uring-post-20191128
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Merge tag 'for-5.5/io_uring-post-20191128' of git://git.kernel.dk/linux-block

Pull more io_uring updates from Jens Axboe:
 "As mentioned in the first pull request, there was a later batch as
  well. This contains fixes to the stuff that already went in, cleanups,
  and a few later additions. In particular, this contains:

   - Cleanups/fixes/unification of the submission and completion path
     (Pavel,me)

   - Linked timeouts improvements (Pavel,me)

   - Error path fixes (me)

   - Fix lookup window where cancellations wouldn't work (me)

   - Improve DRAIN support (Pavel)

   - Fix backlog flushing -EBUSY on submit (me)

   - Add support for connect(2) (me)

   - Fix for non-iter based fixed IO (Pavel)

   - creds inheritance for async workers (me)

   - Disable cmsg/ancillary data for sendmsg/recvmsg (me)

   - Shrink io_kiocb to 3 cachelines (me)

   - NUMA fix for io-wq (Jann)"

* tag 'for-5.5/io_uring-post-20191128' of git://git.kernel.dk/linux-block: (42 commits)
  io_uring: make poll->wait dynamically allocated
  io-wq: shrink io_wq_work a bit
  io-wq: fix handling of NUMA node IDs
  io_uring: use kzalloc instead of kcalloc for single-element allocations
  io_uring: cleanup io_import_fixed()
  io_uring: inline struct sqe_submit
  io_uring: store timeout's sqe->off in proper place
  net: disallow ancillary data for __sys_{send,recv}msg_file()
  net: separate out the msghdr copy from ___sys_{send,recv}msg()
  io_uring: remove superfluous check for sqe->off in io_accept()
  io_uring: async workers should inherit the user creds
  io-wq: have io_wq_create() take a 'data' argument
  io_uring: fix dead-hung for non-iter fixed rw
  io_uring: add support for IORING_OP_CONNECT
  net: add __sys_connect_file() helper
  io_uring: only return -EBUSY for submit on non-flushed backlog
  io_uring: only !null ptr to io_issue_sqe()
  io_uring: simplify io_req_link_next()
  io_uring: pass only !null to io_req_find_next()
  io_uring: remove io_free_req_find_next()
  ...
2019-11-28 10:43:39 -08:00
Dave Airlie
0a6cad5df5 Merge branch 'vmwgfx-coherent' of git://people.freedesktop.org/~thomash/linux into drm-next
Graphics APIs like OpenGL 4.4 and Vulkan require the graphics driver
to provide coherent graphics memory, meaning that the GPU sees any
content written to the coherent memory on the next GPU operation that
touches that memory, and the CPU sees any content written by the GPU
to that memory immediately after any fence object trailing the GPU
operation is signaled.

Paravirtual drivers that otherwise require explicit synchronization
needs to do this by hooking up dirty tracking to pagefault handlers
and buffer object validation.

Provide mm helpers needed for this and that also allow for huge pmd-
and pud entries (patch 1-3), and the associated vmwgfx code (patch 4-7).

The code has been tested and exercised by a tailored version of mesa
where we disable all explicit synchronization and assume graphics memory
is coherent. The performance loss varies of course; a typical number is
around 5%.

Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Thomas Hellstrom <thomas_os@shipmail.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20191113131639.4653-1-thomas_os@shipmail.org
2019-11-28 14:33:01 +10:00
Linus Torvalds
a6ed68d646 drm main pull for 5.5-rc1
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Merge tag 'drm-next-2019-11-27' of git://anongit.freedesktop.org/drm/drm

Pull drm updates from Dave Airlie:
 "Lots of stuff in here, though it hasn't been too insane this merge
  apart from dealing with the security fun.

  uapi:
   - export different colorspace properties on DP vs HDMI
   - new fourcc for ARM 16x16 block format
   - syncobj: allow querying last submitted timeline value
   - DRM_FORMAT_BIG_ENDIAN defined as unsigned

  core:
   - allow using gem vma manager in ttm
   - connector/encoder/bridge doc fixes
   - allow more than 3 encoders for a connector
   - displayport mst suspend/resume reprobing support
   - vram lazy unmapping, uniform vram mm and gem vram
   - edid cleanups + AVI informframe bar info
   - displayport helpers - dpcd parser added

  dp_cec:
   - Allow a connector to be associated with a cec device

  ttm:
   - pipelining with no_gpu_wait fix
   - always keep BOs on the LRU

  sched:
   - allow free_job routine to sleep

  i915:
   - Block userptr from mappable GTT
   - i915 perf uapi versioning
   - OA stream dynamic reconfiguration
   - make context persistence optional
   - introduce DRM_I915_UNSTABLE Kconfig
   - add fake lmem testing under unstable
   - BT.2020 support for DP MSA
   - struct mutex elimination
   - Tigerlake display/PLL/power management improvements
   - Jasper Lake PCH support
   - refactor PMU for multiple GPUs
   - Icelake firmware update
   - Split out vga + switcheroo code

  amdgpu:
   - implement dma-buf import/export without helpers
   - vega20 RAS enablement
   - DC i2c over aux fixes
   - renoir GPU reset
   - DC HDCP support
   - BACO support for CI/VI asics
   - MSI-X support
   - Arcturus EEPROM support
   - Arcturus VCN encode support
   - VCN dynamic powergating on RV/RV2

  amdkfd:
   - add navi12/14/renoir support to kfd

  radeon:
   - SI dpm fix ported from amdgpu
   - fix bad DMA on ppc platforms

  gma500:
   - memory leak fixes

  qxl:
   - convert to new gem mmap

  exynos:
   - build warning fix

  komeda:
   - add aclk sysfs attribute

  v3d:
   - userspace cleanup uapi change

  i810:
   - fix for underflow in dispatch ioctls

  ast:
   - refactor show_cursor

  mgag200:
   - refactor show_cursor

  arcgpu:
   - encoder finding improvements

  mediatek:
   - mipi_tx, dsi and partial crtc support for MT8183 SoC
   - rotation support

  meson:
   - add suspend/resume support

  omap:
   - misc refactors

  tegra:
   - DisplayPort support for Tegra 210, 186 and 194.
   - IOMMU-backed DMA API fixes

  panfrost:
   - fix lockdep issue
   - simplify devfreq integration

  rcar-du:
   - R8A774B1 SoC support
   - fixes for H2 ES2.0

  sun4i:
   - vcc-dsi regulator support

  virtio-gpu:
   - vmexit vs spinlock fix
   - move to gem shmem helpers
   - handle large command buffers with cma"

* tag 'drm-next-2019-11-27' of git://anongit.freedesktop.org/drm/drm: (1855 commits)
  drm/amdgpu: invalidate mmhub semaphore workaround in gmc9/gmc10
  drm/amdgpu: initialize vm_inv_eng0_sem for gfxhub and mmhub
  drm/amd/amdgpu/sriov skip RLCG s/r list for arcturus VF.
  drm/amd/amdgpu/sriov temporarily skip ras,dtm,hdcp for arcturus VF
  drm/amdgpu/gfx10: re-init clear state buffer after gpu reset
  merge fix for "ftrace: Rework event_create_dir()"
  drm/amdgpu: Update Arcturus golden registers
  drm/amdgpu/gfx10: fix out-of-bound mqd_backup array access
  drm/amdgpu/gfx10: explicitly wait for cp idle after halt/unhalt
  Revert "drm/amd/display: enable S/G for RAVEN chip"
  drm/amdgpu: disable gfxoff on original raven
  drm/amdgpu: remove experimental flag for Navi14
  drm/amdgpu: disable gfxoff when using register read interface
  drm/amdgpu/powerplay: properly set PP_GFXOFF_MASK (v2)
  drm/amdgpu: fix bad DMA from INTERRUPT_CNTL2
  drm/radeon: fix bad DMA from INTERRUPT_CNTL2
  drm/amd/display: Fix debugfs on MST connectors
  drm/amdgpu/nv: add asic func for fetching vbios from rom directly
  drm/amdgpu: put flush_delayed_work at first
  drm/amdgpu/vcn2.5: fix the enc loop with hw fini
  ...
2019-11-27 17:45:48 -08:00
Linus Torvalds
8c39f71ee2 Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
Pull networking fixes from David Miller:
 "This is mostly to fix the iwlwifi regression:

  1) Flush GRO state properly in iwlwifi driver, from Alexander Lobakin.

  2) Validate TIPC link name with properly length macro, from John
     Rutherford.

  3) Fix completion init and device query timeouts in ibmvnic, from
     Thomas Falcon.

  4) Fix SKB size calculation for netlink messages in psample, from
     Nikolay Aleksandrov.

  5) Similar kind of fix for OVS flow dumps, from Paolo Abeni.

  6) Handle queue allocation failure unwind properly in gve driver, we
     could try to release pages we didn't allocate. From Jeroen de
     Borst.

  7) Serialize TX queue SKB list accesses properly in mscc ocelot
     driver. From Yangbo Lu"

* git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net:
  net: usb: aqc111: Use the correct style for SPDX License Identifier
  net: phy: Use the correct style for SPDX License Identifier
  net: wireless: intel: iwlwifi: fix GRO_NORMAL packet stalling
  net: mscc: ocelot: use skb queue instead of skbs list
  net: mscc: ocelot: avoid incorrect consuming in skbs list
  gve: Fix the queue page list allocated pages count
  net: inet_is_local_reserved_port() port arg should be unsigned short
  openvswitch: fix flow command message size
  net: phy: dp83869: Fix return paths to return proper values
  net: psample: fix skb_over_panic
  net: usbnet: Fix -Wcast-function-type
  net: hso: Fix -Wcast-function-type
  net: port < inet_prot_sock(net) --> inet_port_requires_bind_service(net, port)
  ibmvnic: Serialize device queries
  ibmvnic: Bound waits for device queries
  ibmvnic: Terminate waiting device threads after loss of service
  ibmvnic: Fix completion structure initialization
  net-sctp: replace some sock_net(sk) with just 'net'
  net: Fix a documentation bug wrt. ip_unprivileged_port_start
  tipc: fix link name length check
2019-11-27 17:17:40 -08:00
Linus Torvalds
95f1fa9e34 New tracing features:
- PERAMAENT flag to ftrace_ops when attaching a callback to a function
    As /proc/sys/kernel/ftrace_enabled when set to zero will disable all
    attached callbacks in ftrace, this has a detrimental impact on live
    kernel tracing, as it disables all that it patched. If a ftrace_ops
    is registered to ftrace with the PERMANENT flag set, it will prevent
    ftrace_enabled from being disabled, and if ftrace_enabled is already
    disabled, it will prevent a ftrace_ops with PREMANENT flag set from
    being registered.
 
  - New register_ftrace_direct(). As eBPF would like to register its own
    trampolines to be called by the ftrace nop locations directly,
    without going through the ftrace trampoline, this function has been
    added. This allows for eBPF trampolines to live along side of
    ftrace, perf, kprobe and live patching. It also utilizes the ftrace
    enabled_functions file that keeps track of functions that have been
    modified in the kernel, to allow for security auditing.
 
  - Allow for kernel internal use of ftrace instances. Subsystems in
    the kernel can now create and destroy their own tracing instances
    which allows them to have their own tracing buffer, and be able
    to record events without worrying about other users from writing over
    their data.
 
  - New seq_buf_hex_dump() that lets users use the hex_dump() in their
    seq_buf usage.
 
  - Notifications now added to tracing_max_latency to allow user space
    to know when a new max latency is hit by one of the latency tracers.
 
  - Wider spread use of generic compare operations for use of bsearch and
    friends.
 
  - More synthetic event fields may be defined (32 up from 16)
 
  - Use of xarray for architectures with sparse system calls, for the
    system call trace events.
 
 This along with small clean ups and fixes.
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Merge tag 'trace-v5.5' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace

Pull tracing updates from Steven Rostedt:
 "New tracing features:

   - New PERMANENT flag to ftrace_ops when attaching a callback to a
     function.

     As /proc/sys/kernel/ftrace_enabled when set to zero will disable
     all attached callbacks in ftrace, this has a detrimental impact on
     live kernel tracing, as it disables all that it patched. If a
     ftrace_ops is registered to ftrace with the PERMANENT flag set, it
     will prevent ftrace_enabled from being disabled, and if
     ftrace_enabled is already disabled, it will prevent a ftrace_ops
     with PREMANENT flag set from being registered.

   - New register_ftrace_direct().

     As eBPF would like to register its own trampolines to be called by
     the ftrace nop locations directly, without going through the ftrace
     trampoline, this function has been added. This allows for eBPF
     trampolines to live along side of ftrace, perf, kprobe and live
     patching. It also utilizes the ftrace enabled_functions file that
     keeps track of functions that have been modified in the kernel, to
     allow for security auditing.

   - Allow for kernel internal use of ftrace instances.

     Subsystems in the kernel can now create and destroy their own
     tracing instances which allows them to have their own tracing
     buffer, and be able to record events without worrying about other
     users from writing over their data.

   - New seq_buf_hex_dump() that lets users use the hex_dump() in their
     seq_buf usage.

   - Notifications now added to tracing_max_latency to allow user space
     to know when a new max latency is hit by one of the latency
     tracers.

   - Wider spread use of generic compare operations for use of bsearch
     and friends.

   - More synthetic event fields may be defined (32 up from 16)

   - Use of xarray for architectures with sparse system calls, for the
     system call trace events.

  This along with small clean ups and fixes"

* tag 'trace-v5.5' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace: (51 commits)
  tracing: Enable syscall optimization for MIPS
  tracing: Use xarray for syscall trace events
  tracing: Sample module to demonstrate kernel access to Ftrace instances.
  tracing: Adding new functions for kernel access to Ftrace instances
  tracing: Fix Kconfig indentation
  ring-buffer: Fix typos in function ring_buffer_producer
  ftrace: Use BIT() macro
  ftrace: Return ENOTSUPP when DYNAMIC_FTRACE_WITH_DIRECT_CALLS is not configured
  ftrace: Rename ftrace_graph_stub to ftrace_stub_graph
  ftrace: Add a helper function to modify_ftrace_direct() to allow arch optimization
  ftrace: Add helper find_direct_entry() to consolidate code
  ftrace: Add another check for match in register_ftrace_direct()
  ftrace: Fix accounting bug with direct->count in register_ftrace_direct()
  ftrace/selftests: Fix spelling mistake "wakeing" -> "waking"
  tracing: Increase SYNTH_FIELDS_MAX for synthetic_events
  ftrace/samples: Add a sample module that implements modify_ftrace_direct()
  ftrace: Add modify_ftrace_direct()
  tracing: Add missing "inline" in stub function of latency_fsnotify()
  tracing: Remove stray tab in TRACE_EVAL_MAP_FILE's help text
  tracing: Use seq_buf_hex_dump() to dump buffers
  ...
2019-11-27 11:42:01 -08:00
Linus Torvalds
477093b3e1 Microblaze patches for 5.5-rc1
- Extend DTB space
 - Defconfig update
 - Clean up rescheduling logic
 - Enabling SPARSE_IRQ
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Merge tag 'microblaze-v5.5-rc1' of git://git.monstr.eu/linux-2.6-microblaze

Pull Microblaze updates from Michal Simek:

 - extend DTB space

 - defconfig update

 - clean up rescheduling logic

 - enable SPARSE_IRQ

* tag 'microblaze-v5.5-rc1' of git://git.monstr.eu/linux-2.6-microblaze:
  microblaze: Increase max dtb size to 64K from 32K
  microblaze: Enable SPARSE_IRQ
  microblaze: defconfig: Enable devtmps and tmpfs
  microblaze: entry: Remove unneeded need_resched() loop
2019-11-27 11:30:55 -08:00
Linus Torvalds
6a0e20cd8c First set of RISC-V updates for v5.5-rc1
New features:
 
 - SECCOMP support
 
 - nommu support
 
 - SBI-less system support
 
 - M-Mode support
 
 - TLB flush optimizations
 
 Other improvements:
 
 - Pass the complete RISC-V ISA string supported by the CPU cores to
   userspace, rather than redacting parts of it in the kernel
 
 - Add platform DMA IP block data to the HiFive Unleashed board DT file
 
 - Add Makefile support for BZ2, LZ4, LZMA, LZO kernel image
   compression formats, in line with other architectures
 
 Cleanups:
 
 - Remove unnecessary PTE_PARENT_SIZE macro
 
 - Standardize include guard naming across arch/riscv
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Merge tag 'riscv/for-v5.5-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux

Pull RISC-V updates from Paul Walmsley:
 "New features:
   - SECCOMP support
   - nommu support
   - SBI-less system support
   - M-Mode support
   - TLB flush optimizations

  Other improvements:
   - Pass the complete RISC-V ISA string supported by the CPU cores to
     userspace, rather than redacting parts of it in the kernel
   - Add platform DMA IP block data to the HiFive Unleashed board DT
     file
   - Add Makefile support for BZ2, LZ4, LZMA, LZO kernel image
     compression formats, in line with other architectures

  Cleanups:
   - Remove unnecessary PTE_PARENT_SIZE macro
   - Standardize include guard naming across arch/riscv"

* tag 'riscv/for-v5.5-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux: (22 commits)
  riscv: provide a flat image loader
  riscv: add nommu support
  riscv: clear the instruction cache and all registers when booting
  riscv: read the hart ID from mhartid on boot
  riscv: provide native clint access for M-mode
  riscv: dts: add support for PDMA device of HiFive Unleashed Rev A00
  riscv: add support for MMIO access to the timer registers
  riscv: implement remote sfence.i using IPIs
  riscv: cleanup the default power off implementation
  riscv: poison SBI calls for M-mode
  riscv: don't allow selecting SBI based drivers for M-mode
  RISC-V: Add multiple compression image format.
  riscv: clean up the macro format in each header file
  riscv: Use PMD_SIZE to replace PTE_PARENT_SIZE
  riscv: abstract out CSR names for supervisor vs machine mode
  riscv: separate MMIO functions into their own header file
  riscv: enter WFI in default_power_off() if SBI does not shutdown
  RISC-V: Issue a tlb page flush if possible
  RISC-V: Issue a local tlbflush if possible.
  RISC-V: Do not invoke SBI call if cpumask is empty
  ...
2019-11-27 11:27:59 -08:00
Nishad Kamdar
bac139a846 net: usb: aqc111: Use the correct style for SPDX License Identifier
This patch corrects the SPDX License Identifier style in
header files related to drivers for USB Network devices.
This patch gives an explicit block comment to the
SPDX License Identifier.

Changes made by using a script provided by Joe Perches here:
https://lkml.org/lkml/2019/2/7/46.

Suggested-by: Joe Perches <joe@perches.com>
Signed-off-by: Nishad Kamdar <nishadkamdar@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2019-11-27 11:27:01 -08:00
Nishad Kamdar
9aab906a9a net: phy: Use the correct style for SPDX License Identifier
This patch corrects the SPDX License Identifier style in
header files related to PHY Layer for Ethernet drivers.
For C header files Documentation/process/license-rules.rst
mandates C-like comments (opposed to C source files where
C++ style should be used). This patch also gives an explicit
block comment to the SPDX License Identifier.

Changes made by using a script provided by Joe Perches here:
https://lkml.org/lkml/2019/2/7/46.

Suggested-by: Joe Perches <joe@perches.com>
Signed-off-by: Nishad Kamdar <nishadkamdar@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2019-11-27 11:25:48 -08:00
Linus Torvalds
80eb5fea3c powerpc fixes for Spectre-RSB
We failed to activate the mitigation for Spectre-RSB (Return Stack
 Buffer, aka. ret2spec) on context switch, on CPUs prior to Power9
 DD2.3.
 
 That allows a process to poison the RSB (called Link Stack on Power
 CPUs) and possibly misdirect speculative execution of another process.
 If the victim process can be induced to execute a leak gadget then it
 may be possible to extract information from the victim via a side
 channel.
 
 The fix is to correctly activate the link stack flush mitigation on
 all CPUs that have any mitigation of Spectre v2 in userspace enabled.
 
 There's a second commit which adds a link stack flush in the KVM guest
 exit path. A leak via that path has not been demonstrated, but we
 believe it's at least theoretically possible.
 
 This is the fix for CVE-2019-18660.
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Merge tag 'powerpc-spectre-rsb' of powerpc-CVE-2019-18660.bundle

Pull powerpc Spectre-RSB fixes from Michael Ellerman:
 "We failed to activate the mitigation for Spectre-RSB (Return Stack
  Buffer, aka. ret2spec) on context switch, on CPUs prior to Power9
  DD2.3.

  That allows a process to poison the RSB (called Link Stack on Power
  CPUs) and possibly misdirect speculative execution of another process.
  If the victim process can be induced to execute a leak gadget then it
  may be possible to extract information from the victim via a side
  channel.

  The fix is to correctly activate the link stack flush mitigation on
  all CPUs that have any mitigation of Spectre v2 in userspace enabled.

  There's a second commit which adds a link stack flush in the KVM guest
  exit path. A leak via that path has not been demonstrated, but we
  believe it's at least theoretically possible.

  This is the fix for CVE-2019-18660"

* tag 'powerpc-spectre-rsb' of /home/torvalds/Downloads/powerpc-CVE-2019-18660.bundle:
  KVM: PPC: Book3S HV: Flush link stack on guest exit to host kernel
  powerpc/book3s64: Fix link stack flush on context switch
2019-11-27 11:25:04 -08:00
Alexander Lobakin
b167191e2a net: wireless: intel: iwlwifi: fix GRO_NORMAL packet stalling
Commit 6570bc79c0 ("net: core: use listified Rx for GRO_NORMAL in
napi_gro_receive()") has applied batched GRO_NORMAL packets processing
to all napi_gro_receive() users, including mac80211-based drivers.

However, this change has led to a regression in iwlwifi driver [1][2] as
it is required for NAPI users to call napi_complete_done() or
napi_complete() and the end of every polling iteration, whilst iwlwifi
doesn't use NAPI scheduling at all and just calls napi_gro_flush().
In that particular case, packets which have not been already flushed
from napi->rx_list stall in it until at least next Rx cycle.

Fix this by adding a manual flushing of the list to iwlwifi driver right
before napi_gro_flush() call to mimic napi_complete() logics.

I prefer to open-code gro_normal_list() rather than exporting it for 2
reasons:
* to prevent from using it and napi_gro_flush() in any new drivers,
  as it is the *really* bad way to use NAPI that should be avoided;
* to keep gro_normal_list() static and don't lose any CC optimizations.

I also don't add the "Fixes:" tag as the mentioned commit was only a
trigger that only exposed an improper usage of NAPI in this particular
driver.

[1] https://lore.kernel.org/netdev/PSXP216MB04388962C411CD0B17A86F47804A0@PSXP216MB0438.KORP216.PROD.OUTLOOK.COM
[2] https://bugzilla.kernel.org/show_bug.cgi?id=205647

Signed-off-by: Alexander Lobakin <alobakin@dlink.ru>
Acked-by: Luca Coelho <luciano.coelho@intel.com>
Reported-by: Nicholas Johnson <nicholas.johnson-opensource@outlook.com.au>
Tested-by: Nicholas Johnson <nicholas.johnson-opensource@outlook.com.au>
Reviewed-by: Edward Cree <ecree@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2019-11-27 11:22:51 -08:00
Linus Torvalds
9a3d7fd275 Driver core patches for 5.5-rc1
Here is the "big" set of driver core patches for 5.5-rc1
 
 There's a few minor cleanups and fixes in here, but the majority of the
 patches in here fall into two buckets:
   - debugfs api cleanups and fixes
   - driver core device link support for boot dependancy issues
 
 The debugfs api cleanups are working to slowly refactor the debugfs apis
 so that it is even harder to use incorrectly.  That work has been
 happening for the past few kernel releases and will continue over time,
 it's a long-term project/goal
 
 The driver core device link support missed 5.4 by just a bit, so it's
 been sitting and baking for many months now.  It's from Saravana Kannan
 to help resolve the problems that DT-based systems have at boot time
 with dependancy graphs and kernel modules.  Turns out that no one has
 actually tried to build a generic arm64 kernel with loads of modules and
 have it "just work" for a variety of platforms (like a distro kernel)
 The big problem turned out to be a lack of depandancy information
 between different areas of DT entries, and the work here resolves that
 problem and now allows devices to boot properly, and quicker than a
 monolith kernel.
 
 All of these patches have been in linux-next for a long time with no
 reported issues.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'driver-core-5.5-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 patches for 5.5-rc1

  There's a few minor cleanups and fixes in here, but the majority of
  the patches in here fall into two buckets:

   - debugfs api cleanups and fixes

   - driver core device link support for boot dependancy issues

  The debugfs api cleanups are working to slowly refactor the debugfs
  apis so that it is even harder to use incorrectly. That work has been
  happening for the past few kernel releases and will continue over
  time, it's a long-term project/goal

  The driver core device link support missed 5.4 by just a bit, so it's
  been sitting and baking for many months now. It's from Saravana Kannan
  to help resolve the problems that DT-based systems have at boot time
  with dependancy graphs and kernel modules. Turns out that no one has
  actually tried to build a generic arm64 kernel with loads of modules
  and have it "just work" for a variety of platforms (like a distro
  kernel). The big problem turned out to be a lack of dependency
  information between different areas of DT entries, and the work here
  resolves that problem and now allows devices to boot properly, and
  quicker than a monolith kernel.

  All of these patches have been in linux-next for a long time with no
  reported issues"

* tag 'driver-core-5.5-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (68 commits)
  tracing: Remove unnecessary DEBUG_FS dependency
  of: property: Add device link support for interrupt-parent, dmas and -gpio(s)
  debugfs: Fix !DEBUG_FS debugfs_create_automount
  of: property: Add device link support for "iommu-map"
  of: property: Fix the semantics of of_is_ancestor_of()
  i2c: of: Populate fwnode in of_i2c_get_board_info()
  drivers: base: Fix Kconfig indentation
  firmware_loader: Fix labels with comma for builtin firmware
  driver core: Allow device link operations inside sync_state()
  driver core: platform: Declare ret variable only once
  cpu-topology: declare parse_acpi_topology in <linux/arch_topology.h>
  crypto: hisilicon: no need to check return value of debugfs_create functions
  driver core: platform: use the correct callback type for bus_find_device
  firmware_class: make firmware caching configurable
  driver core: Clarify documentation for fwnode_operations.add_links()
  mailbox: tegra: Fix superfluous IRQ error message
  net: caif: Fix debugfs on 64-bit platforms
  mac80211: Use debugfs_create_xul() helper
  media: c8sectpfe: no need to check return value of debugfs_create functions
  of: property: Add device link support for iommus, mboxes and io-channels
  ...
2019-11-27 11:06:20 -08:00
Linus Torvalds
0dd09bc02c Staging / IIO patches for 5.5-rc1
Here is the big staging and iio set of patches for the 5.5-rc1 release.
 
 It's the usual huge collection of cleanup patches all over the
 drivers/staging/ area, along with a new staging driver, and a bunch of
 new IIO drivers as well.
 
 Full details are in the shortlog, but all of these have been in
 linux-next for a long time with no reported issues.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'staging-5.5-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging

Pull staging / iio updates from Greg KH:
 "Here is the big staging and iio set of patches for the 5.5-rc1
  release.

  It's the usual huge collection of cleanup patches all over the
  drivers/staging/ area, along with a new staging driver, and a bunch of
  new IIO drivers as well.

  Full details are in the shortlog, but all of these have been in
  linux-next for a long time with no reported issues"

* tag 'staging-5.5-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging: (548 commits)
  staging: vchiq: Have vchiq_dump_* functions return an error code
  staging: vchiq: Refactor indentation in vchiq_dump_* functions
  staging: fwserial: Fix Kconfig indentation (seven spaces)
  staging: vchiq_dump: Replace min with min_t
  staging: vchiq: Fix block comment format in vchiq_dump()
  staging: octeon: indent with tabs instead of spaces
  staging: comedi: usbduxfast: usbduxfast_ai_cmdtest rounding error
  staging: most: core: remove sysfs attr remove_link
  staging: vc04: Fix Kconfig indentation
  staging: pi433: Fix Kconfig indentation
  staging: nvec: Fix Kconfig indentation
  staging: most: Fix Kconfig indentation
  staging: fwserial: Fix Kconfig indentation
  staging: fbtft: Fix Kconfig indentation
  fbtft: Drop OF dependency
  fbtft: Make use of device property API
  fbtft: Drop useless #ifdef CONFIG_OF and dead code
  fbtft: Describe function parameters in kernel-doc
  fbtft: Make sure string is NULL terminated
  staging: rtl8723bs: remove set but not used variable 'change', 'pos'
  ...
2019-11-27 10:57:52 -08:00
Linus Torvalds
8f56e4ebe0 Char/Misc driver patches for 5.5-rc1
Here is the big set of char/misc and other driver patches for 5.5-rc1
 
 Loads of different things in here, this feels like the catch-all of
 driver subsystems these days.  Full details are in the shortlog, but
 nothing major overall, just lots of driver updates and additions.
 
 All of these have been in linux-next for a while with no reported
 issues.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'char-misc-5.5-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc

Pull char/misc driver updates from Greg KH:
 "Here is the big set of char/misc and other driver patches for 5.5-rc1

  Loads of different things in here, this feels like the catch-all of
  driver subsystems these days. Full details are in the shortlog, but
  nothing major overall, just lots of driver updates and additions.

  All of these have been in linux-next for a while with no reported
  issues"

* tag 'char-misc-5.5-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (198 commits)
  char: Fix Kconfig indentation, continued
  habanalabs: add more protection of device during reset
  habanalabs: flush EQ workers in hard reset
  habanalabs: make the reset code more consistent
  habanalabs: expose reset counters via existing INFO IOCTL
  habanalabs: make code more concise
  habanalabs: use defines for F/W files
  habanalabs: remove prints on successful device initialization
  habanalabs: remove unnecessary checks
  habanalabs: invalidate MMU cache only once
  habanalabs: skip VA block list update in reset flow
  habanalabs: optimize MMU unmap
  habanalabs: prevent read/write from/to the device during hard reset
  habanalabs: split MMU properties to PCI/DRAM
  habanalabs: re-factor MMU masks and documentation
  habanalabs: type specific MMU cache invalidation
  habanalabs: re-factor memory module code
  habanalabs: export uapi defines to user-space
  habanalabs: don't print error when queues are full
  habanalabs: increase max jobs number to 512
  ...
2019-11-27 10:53:50 -08:00