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  1. 30 8月, 2019 2 次提交
    • E
      iommu: Revisit iommu_insert_resv_region() implementation · 4dbd258f
      由 Eric Auger 提交于 
      Current implementation is recursive and in case of allocation
failure the existing @regions list is altered. A non recursive
version looks better for maintainability and simplifies the
error handling. We use a separate stack for overlapping segment
merging. The elements are sorted by start address and then by
type, if their start address match.

Note this new implementation may change the region order of
appearance in /sys/kernel/iommu_groups/<n>/reserved_regions
files but this order has never been documented, see
commit bc7d12b9 ("iommu: Implement reserved_regions
iommu-group sysfs file").
Signed-off-by: NEric Auger <eric.auger@redhat.com>
Reviewed-by: NChristoph Hellwig <hch@lst.de>
Signed-off-by: NJoerg Roedel <jroedel@suse.de>
      4dbd258f
    • E
      iommu/iova: Avoid false sharing on fq_timer_on · 0d87308c
      由 Eric Dumazet 提交于 
      In commit 14bd9a60 ("iommu/iova: Separate atomic variables
to improve performance") Jinyu Qi identified that the atomic_cmpxchg()
in queue_iova() was causing a performance loss and moved critical fields
so that the false sharing would not impact them.

However, avoiding the false sharing in the first place seems easy.
We should attempt the atomic_cmpxchg() no more than 100 times
per second. Adding an atomic_read() will keep the cache
line mostly shared.

This false sharing came with commit 9a005a80
("iommu/iova: Add flush timer").
Signed-off-by: NEric Dumazet <edumazet@google.com>
Fixes: 9a005a80 ('iommu/iova: Add flush timer')
Cc: Jinyu Qi <jinyuqi@huawei.com>
Cc: Joerg Roedel <jroedel@suse.de>
Acked-by: NRobin Murphy <robin.murphy@arm.com>
Signed-off-by: NJoerg Roedel <jroedel@suse.de>
      0d87308c
  3. 23 8月, 2019 11 次提交
  5. 20 8月, 2019 1 次提交
  7. 09 8月, 2019 1 次提交
    • S
      iommu: Remove dev_err() usage after platform_get_irq() · 086f9efa
      由 Stephen Boyd 提交于 
      We don't need dev_err() messages when platform_get_irq() fails now that
platform_get_irq() prints an error message itself when something goes
wrong. Let's remove these prints with a simple semantic patch.

// <smpl>
@@
expression ret;
struct platform_device *E;
@@

ret =
(
platform_get_irq(E, ...)
|
platform_get_irq_byname(E, ...)
);

if ( \( ret < 0 \| ret <= 0 \) )
{
(
-if (ret != -EPROBE_DEFER)
-{ ...
-dev_err(...);
-... }
|
...
-dev_err(...);
)
...
}
// </smpl>

While we're here, remove braces on if statements that only have one
statement (manually).

Cc: Joerg Roedel <joro@8bytes.org>
Cc: iommu@lists.linux-foundation.org
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: NStephen Boyd <swboyd@chromium.org>
Signed-off-by: NJoerg Roedel <jroedel@suse.de>
      086f9efa
  9. 05 8月, 2019 9 次提交
  11. 04 8月, 2019 8 次提交
    • M
      kconfig: Clear "written" flag to avoid data loss · 0c5b6c28
      由 M. Vefa Bicakci 提交于 
      Prior to this commit, starting nconfig, xconfig or gconfig, and saving
the .config file more than once caused data loss, where a .config file
that contained only comments would be written to disk starting from the
second save operation.

This bug manifests itself because the SYMBOL_WRITTEN flag is never
cleared after the first call to conf_write, and subsequent calls to
conf_write then skip all of the configuration symbols due to the
SYMBOL_WRITTEN flag being set.

This commit resolves this issue by clearing the SYMBOL_WRITTEN flag
from all symbols before conf_write returns.

Fixes: 8e2442a5 ("kconfig: fix missing choice values in auto.conf")
Cc: linux-stable <stable@vger.kernel.org> # 4.19+
Signed-off-by: NM. Vefa Bicakci <m.v.b@runbox.com>
Signed-off-by: NMasahiro Yamada <yamada.masahiro@socionext.com>
      0c5b6c28
    • L
      Merge tag 'xtensa-20190803' of git://github.com/jcmvbkbc/linux-xtensa · d8778f13
      由 Linus Torvalds 提交于 
      Pull Xtensa fix from Max Filippov:
 "Fix build for xtensa cores with coprocessors that was broken by
  entry/return abstraction patch"

* tag 'xtensa-20190803' of git://github.com/jcmvbkbc/linux-xtensa:
  xtensa: fix build for cores with coprocessors
      d8778f13
    • L
      Merge branch 'i2c/for-current-fixed' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux · cf6c8aef
      由 Linus Torvalds 提交于 
      Pull i2c fixes from Wolfram Sang:
 "A set of driver fixes for the I2C subsystem"

* 'i2c/for-current-fixed' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux:
  i2c: s3c2410: Mark expected switch fall-through
  i2c: at91: fix clk_offset for sama5d2
  i2c: at91: disable TXRDY interrupt after sending data
  i2c: iproc: Fix i2c master read more than 63 bytes
  eeprom: at24: make spd world-readable again
      cf6c8aef
    • L
      Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 8b7fd679
      由 Linus Torvalds 提交于 
      Pull perf tooling fixes from Thomas Gleixner:
 "A set of updates for perf tools and documentation:

  perf header:
    - Prevent a division by zero
    - Deal with an uninitialized warning proper

  libbpf:
    - Fix the missiong __WORDSIZE definition for musl & al

  UAPI headers:
    - Synchronize kernel headers

  Documentation:
    - Fix the memory units for perf.data size"

* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  libbpf: fix missing __WORDSIZE definition
  perf tools: Fix perf.data documentation units for memory size
  perf header: Fix use of unitialized value warning
  perf header: Fix divide by zero error if f_header.attr_size==0
  tools headers UAPI: Sync if_link.h with the kernel
  tools headers UAPI: Sync sched.h with the kernel
  tools headers UAPI: Sync usbdevice_fs.h with the kernels to get new ioctl
  tools perf beauty: Fix usbdevfs_ioctl table generator to handle _IOC()
  tools headers UAPI: Update tools's copy of drm.h headers
  tools headers UAPI: Update tools's copy of mman.h headers
  tools headers UAPI: Update tools's copy of kvm.h headers
  tools include UAPI: Sync x86's syscalls_64.tbl and generic unistd.h to pick up clone3 and pidfd_open
      8b7fd679
    • L
      Merge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 0432a0a0
      由 Linus Torvalds 提交于 
      Pull vdso timer fixes from Thomas Gleixner:
 "A series of commits to deal with the regression caused by the generic
  VDSO implementation.

  The usage of clock_gettime64() for 32bit compat fallback syscalls
  caused seccomp filters to kill innocent processes because they only
  allow clock_gettime().

  Handle the compat syscalls with clock_gettime() as before, which is
  not a functional problem for the VDSO as the legacy compat application
  interface is not y2038 safe anyway. It's just extra fallback code
  which needs to be implemented on every architecture.

  It's opt in for now so that it does not break the compile of already
  converted architectures in linux-next. Once these are fixed, the
  #ifdeffery goes away.

  So much for trying to be smart and reuse code..."

* 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  arm64: compat: vdso: Use legacy syscalls as fallback
  x86/vdso/32: Use 32bit syscall fallback
  lib/vdso/32: Provide legacy syscall fallbacks
  lib/vdso: Move fallback invocation to the callers
  lib/vdso/32: Remove inconsistent NULL pointer checks
      0432a0a0
    • L
      Merge branch 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · af42e745
      由 Linus Torvalds 提交于 
      Pull irq fixes from Thomas Gleixner:
 "A small bunch of fixes from the irqchip department:

   - Fix a couple of UAF on error paths (RZA1, GICv3 ITS)

   - Fix iMX GPCv2 trigger setting

   - Add missing of_node_put() on error path in MBIGEN

   - Add another bunch of /* fall-through */ to silence warnings"

* 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  irqchip/renesas-rza1: Fix an use-after-free in rza1_irqc_probe()
  irqchip/irq-imx-gpcv2: Forward irq type to parent
  irqchip/irq-mbigen: Add of_node_put() before return
  irqchip/gic-v3-its: Free unused vpt_page when alloc vpe table fail
  irqchip/gic-v3: Mark expected switch fall-through
      af42e745
    • L
      Merge tag 'xfs-5.3-fixes-1' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux · e12b243d
      由 Linus Torvalds 提交于 
      Pull xfs fixes from Darrick Wong:

 - Avoid leaking kernel stack contents to userspace

 - Fix a potential null pointer dereference in the dabtree scrub code

* tag 'xfs-5.3-fixes-1' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux:
  xfs: Fix possible null-pointer dereferences in xchk_da_btree_block_check_sibling()
  xfs: fix stack contents leakage in the v1 inumber ioctls
      e12b243d
    • L
      Merge branch 'akpm' (patches from Andrew) · b7aea68a
      由 Linus Torvalds 提交于 
      Merge misc fixes from Andrew Morton:
 "17 fixes"

* emailed patches from Andrew Morton <akpm@linux-foundation.org>:
  drivers/acpi/scan.c: document why we don't need the device_hotplug_lock
  memremap: move from kernel/ to mm/
  lib/test_meminit.c: use GFP_ATOMIC in RCU critical section
  asm-generic: fix -Wtype-limits compiler warnings
  cgroup: kselftest: relax fs_spec checks
  mm/memory_hotplug.c: remove unneeded return for void function
  mm/migrate.c: initialize pud_entry in migrate_vma()
  coredump: split pipe command whitespace before expanding template
  page flags: prioritize kasan bits over last-cpuid
  ubsan: build ubsan.c more conservatively
  kasan: remove clang version check for KASAN_STACK
  mm: compaction: avoid 100% CPU usage during compaction when a task is killed
  mm: migrate: fix reference check race between __find_get_block() and migration
  mm: vmscan: check if mem cgroup is disabled or not before calling memcg slab shrinker
  ocfs2: remove set but not used variable 'last_hash'
  Revert "kmemleak: allow to coexist with fault injection"
  kernel/signal.c: fix a kernel-doc markup
      b7aea68a
  13. 03 8月, 2019 8 次提交