Since commit bcc5422230 ("mm: hugetlb: introduce page_huge_active")
each hugetlb page maintains its active flag to avoid a race condition
betwe= en multiple calls of isolate_huge_page(), but current kernel
doesn't set the f= lag on a hugepage allocated by migration because the
proper putback routine isn= 't called. This means that users could
still encounter the race referred to by bcc5422230 in this special
case, so this patch fixes it.
Fixes: bcc5422230 ("mm: hugetlb: introduce page_huge_active")
Signed-off-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Cc: Michal Hocko <mhocko@suse.cz>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Hugh Dickins <hughd@google.com>
Cc: <stable@vger.kernel.org> [4.1.x]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
For VM_PFNMAP and VM_MIXEDMAP we use vm_ops->pfn_mkwrite instead of
vm_ops->page_mkwrite to notify abort write access. This means we want
vma->vm_page_prot to be write-protected if the VMA provides this vm_ops.
A theoretical scenario that will cause these missed events is:
On writable mapping with vm_ops->pfn_mkwrite, but without
vm_ops->page_mkwrite: read fault followed by write access to the pfn.
Writable pte will be set up on read fault and write fault will not be
generated.
I found it examining Dave's complaint on generic/080:
http://lkml.kernel.org/g/20150831233803.GO3902@dastard
Although I don't think it's the reason.
It shouldn't be a problem for ext2/ext4 as they provide both pfn_mkwrite
and page_mkwrite.
[akpm@linux-foundation.org: add local vm_ops to avoid 80-cols mess]
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Yigal Korman <yigal@plexistor.com>
Acked-by: Boaz Harrosh <boaz@plexistor.com>
Cc: Matthew Wilcox <matthew.r.wilcox@intel.com>
Cc: Jan Kara <jack@suse.cz>
Cc: Dave Chinner <david@fromorbit.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Add the userfaultfd syscalls to uapi asm-generic, it was tested with
postcopy live migration on aarch64 with both 4k and 64k pagesize
kernels.
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Shuah Khan <shuahkh@osg.samsung.com>
Cc: Thierry Reding <treding@nvidia.com>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
On ppc big endian this check fails, the mutex doesn't necessarily need
to be identical for all pages after pthread_mutex_lock/unlock cycles.
The count verification (outside of the pthread_mutex_t structure)
suffices and that is retained.
Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
Cc: Dr. David Alan Gilbert <dgilbert@redhat.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Shuah Khan <shuahkh@osg.samsung.com>
Cc: Thierry Reding <treding@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This will report the error in the exit code, in addition of the fprintf.
Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
Cc: Dr. David Alan Gilbert <dgilbert@redhat.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Shuah Khan <shuahkh@osg.samsung.com>
Cc: Thierry Reding <treding@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Keep a non-zero placeholder after the count, for the my_bcmp comparison
of the page against the zeropage. The lockless increment between 255 to
256 against a lockless my_bcmp could otherwise return false positives on
ppc32le.
Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
Tested-by: Michael Ellerman <mpe@ellerman.id.au>
Cc: Dr. David Alan Gilbert <dgilbert@redhat.com>
Cc: Shuah Khan <shuahkh@osg.samsung.com>
Cc: Thierry Reding <treding@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
If __NR_userfaultfd is not yet defined by the arch, warn but still build
and run the userfaultfd selftest successfully.
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
Cc: Dr. David Alan Gilbert <dgilbert@redhat.com>
Cc: Shuah Khan <shuahkh@osg.samsung.com>
Cc: Thierry Reding <treding@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Depend on "make headers_install" to create proper headers to include and
provide syscall numbers.
Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
Cc: Dr. David Alan Gilbert <dgilbert@redhat.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Shuah Khan <shuahkh@osg.samsung.com>
Cc: Thierry Reding <treding@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Add the usr/include subdirectory of the top-level tree to the include
path, and make sure to include headers without relative paths to make
sure the sanitized headers get picked up. Otherwise the compiler will
not be able to find the linux/compiler.h header included by the non-
sanitized include/uapi/linux/userfaultfd.h.
While at it, make sure to only hardcode the syscall numbers on x86 and
PowerPC if they haven't been properly picked up from the headers.
Signed-off-by: Thierry Reding <treding@nvidia.com>
Acked-by: Michael Ellerman <mpe@ellerman.id.au>
Cc: Shuah Khan <shuahkh@osg.samsung.com>
Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
Cc: Dr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This reverts commit 51360155ec and adapts
fs/userfaultfd.c to use the old version of that function.
It didn't look robust to call __wake_up_common with "nr == 1" when we
absolutely require wakeall semantics, but we've full control of what we
insert in the two waitqueue heads of the blocked userfaults. No
exclusive waitqueue risks to be inserted into those two waitqueue heads
so we can as well stick to "nr == 1" of the old code and we can rely
purely on the fact no waitqueue inserted in one of the two waitqueue
heads we must enforce as wakeall, has wait->flags WQ_FLAG_EXCLUSIVE set.
Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
Cc: Dr. David Alan Gilbert <dgilbert@redhat.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Shuah Khan <shuahkh@osg.samsung.com>
Cc: Thierry Reding <treding@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Pull cgroup fixes from Tejun Heo:
"The threadgroup locking changes which went in during 4.2 devel cycle
added write locking of a percpu_rwsem in cgroup task migration path;
unfortunately, that involved expedited rcu syncing which turned out to
be too slow and heavy for certain workloads. The patchset which is
dependent on this one didn't get committed during that devel cycle, so
these two patches can be reverted safely.
Oleg reworked percpu_rwsem for 4.4 so that the writer path is a lot
lighter. The reported issue goes away with Oleg's reworked
percpu_rwsem and I'll reapply these patches on the for-4.4 branch so
that they can land together with Oleg's changes"
* 'for-4.3-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup:
Revert "sched, cgroup: replace signal_struct->group_rwsem with a global percpu_rwsem"
Revert "cgroup: simplify threadgroup locking"
* Disable PM runtime for multi-platform ARM with genpd
* Disable legacy default PM Domain on emev2
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Merge tag 'renesas-sh-drivers-for-v4.3' of git://git.kernel.org/pub/scm/linux/kernel/git/horms/renesas
Pull SH drivers updates from Simon Horman:
"I am sending this change after v4.3-rc1 has been released as it
depends on SoC changes which are present in that rc release.
Summary:
- disable PM runtime for multi-platform ARM with genpd
- disable legacy default PM Domain on emev2"
* tag 'renesas-sh-drivers-for-v4.3' of git://git.kernel.org/pub/scm/linux/kernel/git/horms/renesas:
drivers: sh: Disable PM runtime for multi-platform ARM with genpd
drivers: sh: Disable legacy default PM Domain on emev2
Pull s390 fixes from Martin Schwidefsky:
"A couple of system call updates. The two new system calls userfaultfd
and membarrier have been added, as well as the 17 direct calls for the
multiplexed socket system calls.
In addition the system call compat wrappers have been flagged as
notrace functions and a few wrappers could be removed.
And bug fixes for the vector register handling, cpu_mf, suspend/resume,
compat signals, SMT cputime accounting and the zfcp dumper"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
s390: wire up separate socketcalls system calls
s390/compat: remove superfluous compat wrappers
s390/compat: do not trace compat wrapper functions
s390/s390x: allocate sys_membarrier system call number
s390/configs//zfcpdump_defconfig: Remove CONFIG_MEMSTICK
s390: wire up userfaultfd system call
s390/vtime: correct scaled cputime for SMT
s390/cpum_cf: Corrected return code for unauthorized counter sets
s390/compat: correct uc_sigmask of the compat signal frame
s390: fix floating point register corruption
s390/hibernate: fix save and restore of vector registers
Pull ARM fixes from Russell King:
"Three fixes and a resulting cleanup for -rc2:
- Andre Przywara reported that he was seeing a warning with the new
cast inside DMA_ERROR_CODE's definition, and fixed the incorrect
use.
- Doug Anderson noticed that kgdb causes a "scheduling while atomic"
bug.
- OMAP5 folk noticed that their Thumb-2 compiled X servers crashed
when enabling support to cover ARMv6 CPUs due to a kernel bug
leaking some conditional context into the signal handler"
* 'fixes' of git://ftp.arm.linux.org.uk/~rmk/linux-arm:
ARM: 8425/1: kgdb: Don't try to stop the machine when setting breakpoints
ARM: 8437/1: dma-mapping: fix build warning with new DMA_ERROR_CODE definition
ARM: get rid of needless #if in signal handling code
ARM: fix Thumb2 signal handling when ARMv6 is enabled
- Fix a memory allocation size in the devfreq core (Xiaolong Ye).
- Fix a mistake in the exynos-ppmu DT binding (Javier Martinez
Canillas).
- Add support for PPMUv2 ((Platform Performance Monitoring Unit
version 2.0) on the Exynos5433 SoCs (Chanwoo Choi).
- Fix a type casting bug in the Exynos PPMU code (MyungJoo Ham).
- Assorted devfreq code cleanups and optimizations (Javi Merino,
MyungJoo Ham, Viresh Kumar).
- Fix up the ACPI cpufreq driver to use a more lightweight way
to get to its private data in the ->get() callback (Rafael J
Wysocki).
- Fix a CONFIG_ prefix bug in one of the ACPI drivers and make
the ACPI subsystem use IS_ENABLED() instead of #ifdefs in
function bodies (Sudeep Holla).
/
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Merge tag 'pm+acpi-4.3-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull power management and ACPI updates from Rafael Wysocki:
"Included are: a somewhat late devfreq update which however is mostly
fixes and cleanups with one new thing only (the PPMUv2 support on
Exynos5433), an ACPI cpufreq driver fixup and two ACPI core cleanups
related to preprocessor directives.
Specifics:
- Fix a memory allocation size in the devfreq core (Xiaolong Ye).
- Fix a mistake in the exynos-ppmu DT binding (Javier Martinez
Canillas).
- Add support for PPMUv2 ((Platform Performance Monitoring Unit
version 2.0) on the Exynos5433 SoCs (Chanwoo Choi).
- Fix a type casting bug in the Exynos PPMU code (MyungJoo Ham).
- Assorted devfreq code cleanups and optimizations (Javi Merino,
MyungJoo Ham, Viresh Kumar).
- Fix up the ACPI cpufreq driver to use a more lightweight way to get
to its private data in the ->get() callback (Rafael J Wysocki).
- Fix a CONFIG_ prefix bug in one of the ACPI drivers and make the
ACPI subsystem use IS_ENABLED() instead of #ifdefs in function
bodies (Sudeep Holla)"
* tag 'pm+acpi-4.3-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
cpufreq: acpi-cpufreq: Use cpufreq_cpu_get_raw() in ->get()
ACPI: Eliminate CONFIG_.*{, _MODULE} #ifdef in favor of IS_ENABLED()
ACPI: int340x_thermal: add missing CONFIG_ prefix
PM / devfreq: Fix incorrect type issue.
PM / devfreq: tegra: Update governor to use devfreq_update_stats()
PM / devfreq: comments for get_dev_status usage updated
PM / devfreq: drop comment about thermal setting max_freq
PM / devfreq: cache the last call to get_dev_status()
PM / devfreq: Drop unlikely before IS_ERR(_OR_NULL)
PM / devfreq: exynos-ppmu: bit-wise operation bugfix.
PM / devfreq: exynos-ppmu: Update documentation to support PPMUv2
PM / devfreq: exynos-ppmu: Add the support of PPMUv2 for Exynos5433
PM / devfreq: event: Remove incorrect property in exynos-ppmu DT binding
in the framework to avoid oops when get_parent ops return out of range
values on tegra platforms.
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Merge tag 'clk-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux
Pull clk fixes from Stephen Boyd:
"A few driver fixes for tegra, rockchip, and st SoCs and a two-liner in
the framework to avoid oops when get_parent ops return out of range
values on tegra platforms"
* tag 'clk-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux:
drivers: clk: st: Rename st_pll3200c32_407_c0_x into st_pll3200c32_cx_x
clk: check for invalid parent index of orphans in __clk_init()
clk: tegra: dfll: Properly protect OPP list
clk: rockchip: add critical clock for rk3368
- Batch of minor fixups to the new hfi1 driver
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Merge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma
Pull rdma fixes from Doug Ledford:
"The new hfi1 driver in staging/rdma has had a number of fixup patches
since being added to the tree. This is the first batch of those fixes"
* tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma:
IB/hfi: Properly set permissions for user device files
IB/hfi1: mask vs shift confusion
IB/hfi1: clean up some defines
IB/hfi1: info leak in get_ctxt_info()
IB/hfi1: fix a locking bug
IB/hfi1: checking for NULL instead of IS_ERR
IB/hfi1: fix sdma_descq_cnt parameter parsing
IB/hfi1: fix copy_to/from_user() error handling
IB/hfi1: fix pstateinfo from returning improperly byteswapped value
Pull libnvdimm fixes from Dan Williams:
- a boot regression (since v4.2) fix for some ARM configurations from
Tyler
- regression (since v4.1) fixes for mkfs.xfs on a DAX enabled device
from Jeff. These are tagged for -stable.
- a pair of locking fixes from Axel that are hidden from lockdep since
they involve device_lock(). The "btt" one is tagged for -stable, the
other only applies to the new "pfn" mechanism in v4.3.
- a fix for the pmem ->rw_page() path to use wmb_pmem() from Ross.
* 'libnvdimm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm:
mm: fix type cast in __pfn_to_phys()
pmem: add proper fencing to pmem_rw_page()
libnvdimm: pfn_devs: Fix locking in namespace_store
libnvdimm: btt_devs: Fix locking in namespace_store
blockdev: don't set S_DAX for misaligned partitions
dax: fix O_DIRECT I/O to the last block of a blockdev
Pull block updates from Jens Axboe:
"This is a bit bigger than it should be, but I could (did) not want to
send it off last week due to both wanting extra testing, and expecting
a fix for the bounce regression as well. In any case, this contains:
- Fix for the blk-merge.c compilation warning on gcc 5.x from me.
- A set of back/front SG gap merge fixes, from me and from Sagi.
This ensures that we honor SG gapping for integrity payloads as
well.
- Two small fixes for null_blk from Matias, fixing a leak and a
capacity propagation issue.
- A blkcg fix from Tejun, fixing a NULL dereference.
- A fast clone optimization from Ming, fixing a performance
regression since the arbitrarily sized bio's were introduced.
- Also from Ming, a regression fix for bouncing IOs"
* 'for-linus' of git://git.kernel.dk/linux-block:
block: fix bounce_end_io
block: blk-merge: fast-clone bio when splitting rw bios
block: blkg_destroy_all() should clear q->root_blkg and ->root_rl.blkg
block: Copy a user iovec if it includes gaps
block: Refuse adding appending a gapped integrity page to a bio
block: Refuse request/bio merges with gaps in the integrity payload
block: Check for gaps on front and back merges
null_blk: fix wrong capacity when bs is not 512 bytes
null_blk: fix memory leak on cleanup
block: fix bogus compiler warnings in blk-merge.c
Commit 505a666ee3 ("writeback: plug writeback in wb_writeback() and
writeback_inodes_wb()") has us holding a plug during writeback_sb_inodes,
which increases the merge rate when relatively contiguous small files
are written by the filesystem. It helps both on flash and spindles.
For an fs_mark workload creating 4K files in parallel across 8 drives,
this commit improves performance ~9% more by unplugging before calling
cond_resched(). cond_resched() doesn't trigger an implicit unplug, so
explicitly getting the IO down to the device before scheduling reduces
latencies for anyone waiting on clean pages.
It also cuts down on how often we use kblockd to unplug, which means
less work bouncing from one workqueue to another.
Many more details about how we got here:
https://lkml.org/lkml/2015/9/11/570
Signed-off-by: Chris Mason <clm@fb.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
The various definitions of __pfn_to_phys() have been consolidated to
use a generic macro in include/asm-generic/memory_model.h. This hit
mainline in the form of 012dcef3f0 "mm: move __phys_to_pfn and
__pfn_to_phys to asm/generic/memory_model.h". When the generic macro
was implemented the type cast to phys_addr_t was dropped which caused
boot regressions on ARM platforms with more than 4GB of memory and
LPAE enabled.
It was suggested to use PFN_PHYS() defined in include/linux/pfn.h
as provides the correct logic and avoids further duplication.
Reported-by: kernelci.org bot <bot@kernelci.org>
Suggested-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Tyler Baker <tyler.baker@linaro.org>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
* pm-cpufreq:
cpufreq: acpi-cpufreq: Use cpufreq_cpu_get_raw() in ->get()
* pm-devfreq:
PM / devfreq: Fix incorrect type issue.
PM / devfreq: tegra: Update governor to use devfreq_update_stats()
PM / devfreq: comments for get_dev_status usage updated
PM / devfreq: drop comment about thermal setting max_freq
PM / devfreq: cache the last call to get_dev_status()
PM / devfreq: Drop unlikely before IS_ERR(_OR_NULL)
PM / devfreq: exynos-ppmu: bit-wise operation bugfix.
PM / devfreq: exynos-ppmu: Update documentation to support PPMUv2
PM / devfreq: exynos-ppmu: Add the support of PPMUv2 for Exynos5433
PM / devfreq: event: Remove incorrect property in exynos-ppmu DT binding
This fixes the virtio-test tool, and improves
the error handling for virtio-ccw.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost
Pull virtio fixes and cleanups from Michael Tsirkin:
"This fixes the virtio-test tool, and improves the error handling for
virtio-ccw"
* tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost:
virtio/s390: handle failures of READ_VQ_CONF ccw
tools/virtio: propagate V=X to kernel build
vhost: move features to core
tools/virtio: fix build after 4.2 changes
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Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm
Pull KVM fixes from Paolo Bonzini:
"Mostly stable material, a lot of ARM fixes"
* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (22 commits)
sched: access local runqueue directly in single_task_running
arm/arm64: KVM: Remove 'config KVM_ARM_MAX_VCPUS'
arm64: KVM: Remove all traces of the ThumbEE registers
arm: KVM: Disable virtual timer even if the guest is not using it
arm64: KVM: Disable virtual timer even if the guest is not using it
arm/arm64: KVM: vgic: Check for !irqchip_in_kernel() when mapping resources
KVM: s390: Replace incorrect atomic_or with atomic_andnot
arm: KVM: Fix incorrect device to IPA mapping
arm64: KVM: Fix user access for debug registers
KVM: vmx: fix VPID is 0000H in non-root operation
KVM: add halt_attempted_poll to VCPU stats
kvm: fix zero length mmio searching
kvm: fix double free for fast mmio eventfd
kvm: factor out core eventfd assign/deassign logic
kvm: don't try to register to KVM_FAST_MMIO_BUS for non mmio eventfd
KVM: make the declaration of functions within 80 characters
KVM: arm64: add workaround for Cortex-A57 erratum #852523
KVM: fix polling for guest halt continued even if disable it
arm/arm64: KVM: Fix PSCI affinity info return value for non valid cores
arm64: KVM: set {v,}TCR_EL2 RES1 bits
...
Some of the device files are required to be user accessible for PSM while
most should remain accessible only by root.
Add a parameter to hfi1_cdev_init which controls if the user should have access
to this device which places it in a different class with the appropriate
devnode callback.
In addition set the devnode call back for the existing class to be a bit more
explicit for those permissions.
Finally remove the unnecessary null check before class_destroy
Tested-by: Donald Dutile <ddutile@redhat.com>
Signed-off-by: Haralanov, Mitko (mitko.haralanov@intel.com)
Signed-off-by: Ira Weiny <ira.weiny@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
We are shifting by the _MASK macros instead of the _SHIFT ones.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
I added spaces around operators so it matches kernel style because
normally "-1ULL" is a number and " - 1" is a subtract operation. Also
removed some superflous "ULL" types so "1ULL" becomes "1".
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
The cinfo struct has a hole after the last struct member so we need to
zero it out. Otherwise we disclose some uninitialized stack data.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
mutex_trylock() returns zero on failure, not EBUSY.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
__get_txreq() returns an ERR_PTR() but this checks for NULL so it would
oops on failure.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
The boolean tests should have been or-ed.
Reported-by: David Binderman <dcb314@hotmail.com>
Reviewed-by: Jubin John <jubin.john@intel.com>
Signed-off-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
copy_to/from_user() returns the number of bytes which we were not able
to copy. It doesn't return an error code.
Also a couple places had a printk() on error and I removed that because
people can take advantage of it to fill /var/log/messages with spam.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
Byteswap link_width_downgrade_*_active values before sending on the wire. In
addition properly define the Port State Info structure.
Reviewed-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Reviewed-by: Christian Gomez <christian.gomez@intel.com>
Signed-off-by: Rimmer, Todd <todd.rimmer@intel.com>
Signed-off-by: Ira Weiny <ira.weiny@intel.com>
Acked-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
Pull irq updates from Thomas Gleixner:
"This is a rather large update post rc1 due to the final steps of
cleanups and API changes which had to wait for the preparatory patches
to hit your tree.
- Regression fixes for ARM GIC irqchips
- Regression fixes and lockdep anotations for renesas irq chips
- The leftovers of the cleanup and preparatory patches which have
been ignored by maintainers
- Final conversions of the newly merged users of obsolete APIs
- Final removal of obsolete APIs
- Final removal of ARM artifacts which had been introduced during the
conversion of ARM to the generic interrupt code.
- Final split of the irq_data into chip specific and common data to
reflect the needs of hierarchical irq domains.
- Treewide removal of the first argument of interrupt flow handlers,
i.e. the irq number, which is not used by the majority of handlers
and simple to retrieve from the other argument the irq descriptor.
- A few comment updates and build warning fixes"
* 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (40 commits)
arm64: Remove ununsed set_irq_flags
ARM: Remove ununsed set_irq_flags
sh: Kill off set_irq_flags usage
irqchip: Kill off set_irq_flags usage
gpu/drm: Kill off set_irq_flags usage
genirq: Remove irq argument from irq flow handlers
genirq: Move field 'msi_desc' from irq_data into irq_common_data
genirq: Move field 'affinity' from irq_data into irq_common_data
genirq: Move field 'handler_data' from irq_data into irq_common_data
genirq: Move field 'node' from irq_data into irq_common_data
irqchip/gic-v3: Use IRQD_FORWARDED_TO_VCPU flag
irqchip/gic: Use IRQD_FORWARDED_TO_VCPU flag
genirq: Provide IRQD_FORWARDED_TO_VCPU status flag
genirq: Simplify irq_data_to_desc()
genirq: Remove __irq_set_handler_locked()
pinctrl/pistachio: Use irq_set_handler_locked
gpio: vf610: Use irq_set_handler_locked
powerpc/mpc8xx: Use irq_set_handler_locked()
powerpc/ipic: Use irq_set_handler_locked()
powerpc/cpm2: Use irq_set_handler_locked()
...
Pull x86 fix from Thomas Gleixner:
"A single regression fix for the x86 dma allocator which got wreckaged
in the merge window"
* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/pci/dma: Fix gfp flags for coherent DMA memory allocation
- Fix 32-bit TCE table init in kdump kernel from Nish
- Fix kdump with non-power-of-2 crashkernel= from Nish
- Abort cxl_pci_enable_device_hook() if PCI channel is offline from Andrew
- Fix to release DRC when configure_connector() fails from Bharata
- Wire up sys_userfaultfd()
- Fix race condition in tearing down MSI interrupts from Paul
- Fix unbalanced pci_dev_get() in cxl_probe() from Daniel
- Fix cxl build failure due to -Wunused-variable gcc behaviour change from Ian
- Tell the toolchain to use ABI v2 when building an LE boot wrapper from Benh
- Fix THP to recompute hash value after a failed update from Aneesh
- 32-bit memcpy/memset: only use dcbz once cache is enabled from Christophe
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Merge tag 'powerpc-4.3-2' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux
Pull powerpc fixes from Michael Ellerman:
- Fix 32-bit TCE table init in kdump kernel from Nish
- Fix kdump with non-power-of-2 crashkernel= from Nish
- Abort cxl_pci_enable_device_hook() if PCI channel is offline from
Andrew
- Fix to release DRC when configure_connector() fails from Bharata
- Wire up sys_userfaultfd()
- Fix race condition in tearing down MSI interrupts from Paul
- Fix unbalanced pci_dev_get() in cxl_probe() from Daniel
- Fix cxl build failure due to -Wunused-variable gcc behaviour change
from Ian
- Tell the toolchain to use ABI v2 when building an LE boot wrapper
from Benh
- Fix THP to recompute hash value after a failed update from Aneesh
- 32-bit memcpy/memset: only use dcbz once cache is enabled from
Christophe
* tag 'powerpc-4.3-2' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
powerpc32: memset: only use dcbz once cache is enabled
powerpc32: memcpy: only use dcbz once cache is enabled
powerpc/mm: Recompute hash value after a failed update
powerpc/boot: Specify ABI v2 when building an LE boot wrapper
cxl: Fix build failure due to -Wunused-variable behaviour change
cxl: Fix unbalanced pci_dev_get in cxl_probe
powerpc/MSI: Fix race condition in tearing down MSI interrupts
powerpc: Wire up sys_userfaultfd()
powerpc/pseries: Release DRC when configure_connector fails
cxl: abort cxl_pci_enable_device_hook() if PCI channel is offline
powerpc/powernv/pci-ioda: fix kdump with non-power-of-2 crashkernel=
powerpc/powernv/pci-ioda: fix 32-bit TCE table init in kdump kernel
Commit 2ee507c472 ("sched: Add function single_task_running to let a task
check if it is the only task running on a cpu") referenced the current
runqueue with the smp_processor_id. When CONFIG_DEBUG_PREEMPT is enabled,
that is only allowed if preemption is disabled or the currrent task is
bound to the local cpu (e.g. kernel worker).
With commit f781951299 ("kvm: add halt_poll_ns module parameter") KVM
calls single_task_running. If CONFIG_DEBUG_PREEMPT is enabled that
generates a lot of kernel messages.
To avoid adding preemption in that cases, as it would limit the usefulness,
we change single_task_running to access directly the cpu local runqueue.
Cc: Tim Chen <tim.c.chen@linux.intel.com>
Suggested-by: Peter Zijlstra <peterz@infradead.org>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: <stable@vger.kernel.org>
Fixes: 2ee507c472
Signed-off-by: Dominik Dingel <dingel@linux.vnet.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
As discussed on linux-arch all architectures should wire up the separate
system calls that are hidden behind the socketcall multiplexer system call.
It's just a couple more system calls and gives us a very small performance
improvement.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
A couple of compat wrapper functions are simply trampolines to the real
system call. This happened because the compat wrapper defines will only
sign and zero extend system call parameters which are of different size
on s390/s390x (longs and pointers).
All other parameters will be correctly sign and zero extended by the
normal system call wrappers.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Add notrace to the compat wrapper define to disable tracing of compat
wrapper functions. These are supposed to be very small and more or less
just a trampoline to the real system call.
Also fix indentation.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Fix an issue introduced by the previous major toshiba rework. Add a quirk.
Workaround a few platform specific firmware items. One cleanup to wmi I
inadvertently dropped from a previous pull request.
hp-wmi
- limit hotkey enable
toshiba_acpi:
- Fix hotkeys registration on some toshiba models
- Fix USB Sleep and Music always disabled
wmi:
- Remove private %pUL implementation
asus-nb-wmi:
- Add wapf=4 quirk for X456UA/X456UF
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Merge tag 'platform-drivers-x86-v4.3-2' of git://git.infradead.org/users/dvhart/linux-platform-drivers-x86
Pull x86 platform driver fixes from Darren Hart:
"Fix an issue introduced by the previous major toshiba rework. Add a
quirk. Workaround a few platform specific firmware items. One
cleanup to wmi I inadvertently dropped from a previous pull request.
Details:
hp-wmi:
- limit hotkey enable
toshiba_acpi:
- Fix hotkeys registration on some toshiba models
- Fix USB Sleep and Music always disabled
wmi:
- Remove private %pUL implementation
asus-nb-wmi:
- Add wapf=4 quirk for X456UA/X456UF"
* tag 'platform-drivers-x86-v4.3-2' of git://git.infradead.org/users/dvhart/linux-platform-drivers-x86:
hp-wmi: limit hotkey enable
toshiba_acpi: Fix hotkeys registration on some toshiba models
toshiba_acpi: Fix USB Sleep and Music always disabled
wmi: Remove private %pUL implementation
asus-nb-wmi: Add wapf=4 quirk for X456UA/X456UF
Merge misc fixes from ANdrew Morton:
"8 fixes"
* emailed patches from Andrew Morton <akpm@linux-foundation.org>:
revert "mm: make sure all file VMAs have ->vm_ops set"
MAINTAINERS: update LTP mailing list
userfaultfd: add missing mmput() in error path
lib/string_helpers.c: fix infinite loop in string_get_size()
alpha: lib: export __delay
alpha: io: define ioremap_uc
kasan: fix last shadow judgement in memory_is_poisoned_16()
zram: fix possible use after free in zcomp_create()
Revert commit 6dc296e7df "mm: make sure all file VMAs have ->vm_ops
set".
Will Deacon reports that it "causes some mmap regressions in LTP, which
appears to use a MAP_PRIVATE mmap of /dev/zero as a way to get anonymous
pages in some of its tests (specifically mmap10 [1])".
William Shuman reports Oracle crashes.
So revert the patch while we work out what to do.
Reported-by: William Shuman <wshuman3@gmail.com>
Reported-by: Will Deacon <will.deacon@arm.com>
Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This fixes a memleak if anon_inode_getfile() fails in userfaultfd().
Signed-off-by: Eric Biggers <ebiggers3@gmail.com>
Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
