review.tizen.org Git - platform/kernel/linux-starfive.git/log

parisc: fix race condition in patching code

Assume the following ftrace code sequence that was patched in earlier by
ftrace_make_call():

PAGE A:
ffc: addr of ftrace_caller()
PAGE B:
000: 0x6fc10080 /* stw,ma r1,40(sp) */
004: 0x48213fd1 /* ldw -18(r1),r1 */
008: 0xe820c002 /* bv,n r0(r1) */
00c: 0xe83f1fdf /* b,l,n .-c,r1 */

When a Code sequences that is to be patched spans a page break, we might
have already cleared the part on the PAGE A. If an interrupt is coming in
during the remap of the fixed mapping to PAGE B, it might execute the
patched function with only parts of the FTRACE code cleared. To prevent
this, clear the jump to our mini trampoline first, and clear the remaining
parts after this. This might also happen when patch_text() patches a
function that it calls during remap.

Signed-off-by: Sven Schnelle <svens@stackframe.org>
Cc: <stable@vger.kernel.org> # 5.2+
Signed-off-by: Helge Deller <deller@gmx.de>

parisc: rename default_defconfig to defconfig

'default_defconfig' is an awkward name since 'defconfig' is the default.
Let's simply say 'defconfig' like other architectures. You can drop the
KBUILD_DEFCONFIG define by following the standard naming.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Helge Deller <deller@gmx.de>

parisc: Fix fall-through warnings in fpudispatch.c

In fpudispatch.c we see a lot of fall-through warnings, but for this file we
prefer to not mark the switches and instead keep it in it's original state as
it's copied from HP-UX.

Fixes: a035d552a93b ("Makefile: Globally enable fall-through warning")
Signed-off-by: Helge Deller <deller@gmx.de>

parisc: Mark expected switch fall-throughs in fault.c

Fix a fall-through warning in fault.c.

Fixes: a035d552a93b ("Makefile: Globally enable fall-through warning")
Signed-off-by: Helge Deller <deller@gmx.de>

Merge branch 'dax-fix-5.3-rc3' of git://git./linux/kernel/git/nvdimm/nvdimm

Pull dax fix from Dan Williams:
"Fix a botched manual patch update that got dropped between testing and
application"

* 'dax-fix-5.3-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm:
dax: Fix missed wakeup in put_unlocked_entry()

Merge tag 'for-linus-20190730' of git://git./linux/kernel/git/brauner/linux

Pull pidfd fixes from Christian Brauner:
"This makes setting the exit_state in exit_notify() consistent after
  fixing the pidfd polling race pre-rc1. Related to the race fix, this
  adds a WARN_ON() to do_notify_pidfd() to catch any future exit_state
  races.

  Last, this removes an obsolete comment from the pidfd tests"

* tag 'for-linus-20190730' of git://git.kernel.org/pub/scm/linux/kernel/git/brauner/linux:
  exit: make setting exit_state consistent
  pidfd: Add warning if exit_state is 0 during notification
  pidfd: remove obsolete comments from test

Merge tag 'f2fs-for-5.4-rc3' of git://git./linux/kernel/git/jaegeuk/f2fs

Pull f2fs fixes from Jaegeuk Kim:
"This set of patches adjust to follow recent setflags changes and fix
  two regressions"

* tag 'f2fs-for-5.4-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs:
  f2fs: use EINVAL for superblock with invalid magic
  f2fs: fix to read source block before invalidating it
  f2fs: remove redundant check from f2fs_setflags_common()
  f2fs: use generic checking function for FS_IOC_FSSETXATTR
  f2fs: use generic checking and prep function for FS_IOC_SETFLAGS

Merge tag 'linux-kselftest-5.3-rc3' of git://git./linux/kernel/git/shuah/linux-kselftest

Pull kselftest fixes from Shuah Khan:
"Minor fixes to tests and one major fix to livepatch test to add skip
  handling to avoid false fail reports when livepatch is disabled"

* tag 'linux-kselftest-5.3-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest:
  selftests/livepatch: add test skip handling
  selftests: mlxsw: Fix typo in qos_mc_aware.sh
  selftests/x86: fix spelling mistake "FAILT" -> "FAIL"
  selftests: kmod: Fix typo in kmod.sh

Merge tag 'for-linus' of git://git./linux/kernel/git/rdma/rdma

Pull rdma fixes from Jason Gunthorpe:
"A few regression and bug fixes for the patches merged in the last
  cycle:

   - hns fixes a subtle crash from the ib core SGL rework

   - hfi1 fixes various error handling, oops and protocol errors

   - bnxt_re fixes a regression where nvmeof doesn't work on some
     configurations

   - mlx5 fixes a serious 'use after free' bug in how MR caching is
     handled

   - some edge case crashers in the new statistic core code

   - more siw static checker fixups"

* tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma:
  IB/mlx5: Fix RSS Toeplitz setup to be aligned with the HW specification
  IB/counters: Always initialize the port counter object
  IB/core: Fix querying total rdma stats
  IB/mlx5: Prevent concurrent MR updates during invalidation
  IB/mlx5: Fix clean_mr() to work in the expected order
  IB/mlx5: Move MRs to a kernel PD when freeing them to the MR cache
  IB/mlx5: Use direct mkey destroy command upon UMR unreg failure
  IB/mlx5: Fix unreg_umr to ignore the mkey state
  RDMA/siw: Remove set but not used variables 'rv'
  IB/mlx5: Replace kfree with kvfree
  RDMA/bnxt_re: Honor vlan_id in GID entry comparison
  IB/hfi1: Drop all TID RDMA READ RESP packets after r_next_psn
  IB/hfi1: Field not zero-ed when allocating TID flow memory
  IB/hfi1: Unreserve a flushed OPFN request
  IB/hfi1: Check for error on call to alloc_rsm_map_table
  RDMA/hns: Fix sg offset non-zero issue
  RDMA/siw: Fix error return code in siw_init_module()

Merge tag 'for-linus-hmm' of git://git./linux/kernel/git/rdma/rdma

Pull HMM fixes from Jason Gunthorpe:
"Fix the locking around nouveau's use of the hmm_range_* APIs. It works
  correctly in the success case, but many of the the edge cases have
  missing unlocks or double unlocks.

  The diffstat is a bit big as Christoph did a comprehensive job to move
  the obsolete API from the core header and into the driver before
  fixing its flow, but the risk of regression from this code motion is
  low"

* tag 'for-linus-hmm' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma:
  nouveau: unlock mmap_sem on all errors from nouveau_range_fault
  nouveau: remove the block parameter to nouveau_range_fault
  mm/hmm: move hmm_vma_range_done and hmm_vma_fault to nouveau
  mm/hmm: always return EBUSY for invalid ranges in hmm_range_{fault,snapshot}

exit: make setting exit_state consistent

Since commit b191d6491be6 ("pidfd: fix a poll race when setting exit_state")
we unconditionally set exit_state to EXIT_ZOMBIE before calling into
do_notify_parent(). This was done to eliminate a race when querying
exit_state in do_notify_pidfd().
Back then we decided to do the absolute minimal thing to fix this and
not touch the rest of the exit_notify() function where exit_state is
set.
Since this fix has not caused any issues change the setting of
exit_state to EXIT_DEAD in the autoreap case to account for the fact hat
exit_state is set to EXIT_ZOMBIE unconditionally. This fix was planned
but also explicitly requested in [1] and makes the whole code more
consistent.

/* References */
[1]: https://lore.kernel.org/lkml/CAHk-=wigcxGFR2szue4wavJtH5cYTTeNES=toUBVGsmX0rzX+g@mail.gmail.com

Signed-off-by: Christian Brauner <christian@brauner.io>
Acked-by: Oleg Nesterov <oleg@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>

Merge tag 'for_linus' of git://git./linux/kernel/git/mst/vhost

Pull virtio/vhost fixes from Michael Tsirkin:

- Fixes in the iommu and balloon devices.

- Disable the meta-data optimization for now - I hope we can get it
   fixed shortly, but there's no point in making users suffer crashes
   while we are working on that.

* tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost:
  vhost: disable metadata prefetch optimization
  iommu/virtio: Update to most recent specification
  balloon: fix up comments
  mm/balloon_compaction: avoid duplicate page removal

Merge tag 'platform-drivers-x86-v5.3-3' of git://git.infradead.org/linux-platform-drivers-x86

Pull x86 platform driver fixes from Andy Shevchenko:
"Business as usual, a few fixes and new IDs:

   - PC Engines APU got one fix for software dependencies to
     automatically load them and another fix for mapping of key button
     in the front to issue restart event.

   - OLPC driver is now probed automatically based on module device
     table.

   - Intel PMC core driver supports Intel Ice Lake NNPI processor.

   - WMI driver missed description of a new field in the structure that
     has been added"

* tag 'platform-drivers-x86-v5.3-3' of git://git.infradead.org/linux-platform-drivers-x86:
  platform/x86: pcengines-apuv2: use KEY_RESTART for front button
  platform/x86: intel_pmc_core: Add ICL-NNPI support to PMC Core
  Platform: OLPC: add SPI MODULE_DEVICE_TABLE
  platform/x86: wmi: add missing struct parameter description
  platform/x86: pcengines-apuv2: Fix softdep statement

dax: Fix missed wakeup in put_unlocked_entry()

The condition checking whether put_unlocked_entry() needs to wake up
following waiter got broken by commit 23c84eb78375 ("dax: Fix missed
wakeup with PMD faults"). We need to wake the waiter whenever the passed
entry is valid (i.e., non-NULL and not special conflict entry). This
could lead to processes never being woken up when waiting for entry
lock. Fix the condition.

Cc: <stable@vger.kernel.org>
Link: http://lore.kernel.org/r/20190729120228.GC17833@quack2.suse.cz
Fixes: 23c84eb78375 ("dax: Fix missed wakeup with PMD faults")
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>

platform/x86: pcengines-apuv2: use KEY_RESTART for front button

The keycode KEY_RESTART is more appropriate for the front button,
as most people use it for things like restart or factory reset.

Signed-off-by: Enrico Weigelt <info@metux.net>
Fixes: f8eb0235f659 ("x86: pcengines apuv2 gpio/leds/keys platform driver")
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>

pidfd: Add warning if exit_state is 0 during notification

Previously a condition got missed where the pidfd waiters are awakened
before the exit_state gets set. This can result in a missed notification
[1] and the polling thread waiting forever.

It is fixed now, however it would be nice to avoid this kind of issue
going unnoticed in the future. So just add a warning to catch it in the
future.

/* References */
[1]: https://lore.kernel.org/lkml/20190717172100.261204-1-joel@joelfernandes.org/

Signed-off-by: Joel Fernandes (Google) <joel@joelfernandes.org>
Link: https://lore.kernel.org/r/20190724164816.201099-1-joel@joelfernandes.org
Signed-off-by: Christian Brauner <christian@brauner.io>

pidfd: remove obsolete comments from test

Since the introduction of CLONE_PIDFD pidfd_send_signal() is independent
of CONFIG_PROC_FS.

Signed-off-by: Christian Brauner <christian@brauner.io>

f2fs: use EINVAL for superblock with invalid magic

The kernel mount_block_root() function expects -EACESS or -EINVAL for a
unmountable filesystem when trying to mount the root with different
filesystem types.

However, in 5.3-rc1 the behavior when F2FS code cannot find valid block
changed to return -EFSCORRUPTED(-EUCLEAN), and this error code makes
mount_block_root() fail when trying to probe F2FS.

When the magic number of the superblock mismatches, it has a high
probability that it's just not a F2FS. In this case return -EINVAL seems
to be a better result, and this return value can make mount_block_root()
probing work again.

Return -EINVAL when the superblock has magic mismatch, -EFSCORRUPTED in
other cases (the magic matches but the superblock cannot be recognized).

Fixes: 10f966bbf521 ("f2fs: use generic EFSBADCRC/EFSCORRUPTED")
Signed-off-by: Icenowy Zheng <icenowy@aosc.io>
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

Linux 5.3-rc2

Merge tag 'meminit-v5.3-rc2' of git://git./linux/kernel/git/kees/linux

Pull structleak fix from Kees Cook:
"Disable gcc-based stack variable auto-init under KASAN (Arnd
  Bergmann).

  This fixes a bunch of build warnings under KASAN and the
  gcc-plugin-based stack auto-initialization features (which are
  arguably redundant, so better to let KASAN control this)"

* tag 'meminit-v5.3-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux:
  structleak: disable STRUCTLEAK_BYREF in combination with KASAN_STACK

Merge tag 'kbuild-fixes-v5.3' of git://git./linux/kernel/git/masahiroy/linux-kbuild

Pull Kbuild fixes from Masahiro Yamada:

- add compile_commands.json to .gitignore

- fix false-positive warning from gen_compile_commands.py after
   allnoconfig build

- remove unused code

* tag 'kbuild-fixes-v5.3' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild:
  kbuild: remove unused single-used-m
  gen_compile_commands: lower the entry count threshold
  .gitignore: Add compilation database file
  kbuild: remove unused objectify macro

Merge tag 'char-misc-5.3-rc2' of git://git./linux/kernel/git/gregkh/char-misc

Pull char/misc driver fixes from Greg KH:
"Here are some small char and misc driver fixes for 5.3-rc2 to resolve
  some reported issues.

  Nothing major at all, some binder bugfixes for issues found, some new
  mei device ids, firmware building warning fixes, habanalabs fixes, a
  few other build fixes, and a MAINTAINERS update.

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

* tag 'char-misc-5.3-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc:
  test_firmware: fix a memory leak bug
  hpet: Fix division by zero in hpet_time_div()
  eeprom: make older eeprom drivers select NVMEM_SYSFS
  vmw_balloon: Remove Julien from the maintainers list
  fpga-manager: altera-ps-spi: Fix build error
  mei: me: add mule creek canyon (EHL) device ids
  binder: prevent transactions to context manager from its own process.
  binder: Set end of SG buffer area properly.
  firmware: Fix missing inline
  firmware: fix build errors in paged buffer handling code
  habanalabs: don't reset device when getting VRHOT
  habanalabs: use %pad for printing a dma_addr_t

Merge tag 'tty-5.3-rc2' of git://git./linux/kernel/git/gregkh/tty

Pull tty fixes from Greg KH:
"Here are two tty/vt fixes:

   - delete the netx-serial driver as the arch has been removed, no need
     to keep the serial driver for it around either.

   - vt console_lock fix to resolve a reported noisy warning at runtime

  Both of these have been in linux-next with no reported issues"

* tag 'tty-5.3-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty:
  vt: Grab console_lock around con_is_bound in show_bind
  tty: serial: netx: Delete driver

Merge tag 'spdx-5.3-rc2' of git://git./linux/kernel/git/gregkh/spdx

Pull SPDX fixes from Greg KH:
"Here are some small SPDX fixes for 5.3-rc2 for things that came in
  during the 5.3-rc1 merge window that we previously missed.

  Only three small patches here:

   - two uapi patches to resolve some SPDX tags that were not correct

   - fix an invalid SPDX tag in the iomap Makefile file

  All have been properly reviewed on the public mailing lists"

* tag 'spdx-5.3-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/spdx:
  iomap: fix Invalid License ID
  treewide: remove SPDX "WITH Linux-syscall-note" from kernel-space headers again
  treewide: add "WITH Linux-syscall-note" to SPDX tag of uapi headers

Merge tag 'usb-5.3-rc2' of git://git./linux/kernel/git/gregkh/usb

Pull USB fixes from Greg KH:
"Here are some small fixes for 5.3-rc2. All of these resolve some
  reported issues, some more than others :)

  Included in here is:

   - xhci fix for an annoying issue with odd devices

   - reversion of some usb251xb patches that should not have been merged

   - usb pci quirk additions and fixups

   - usb storage fix

   - usb host controller error test fix

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

* tag 'usb-5.3-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb:
  xhci: Fix crash if scatter gather is used with Immediate Data Transfer (IDT).
  usb: usb251xb: Reallow swap-dx-lanes to apply to the upstream port
  Revert "usb: usb251xb: Add US port lanes inversion property"
  Revert "usb: usb251xb: Add US lanes inversion dts-bindings"
  usb: wusbcore: fix unbalanced get/put cluster_id
  usb/hcd: Fix a NULL vs IS_ERR() bug in usb_hcd_setup_local_mem()
  usb-storage: Add a limitation for blk_queue_max_hw_sectors()
  usb: pci-quirks: Minor cleanup for AMD PLL quirk
  usb: pci-quirks: Correct AMD PLL quirk detection

Merge tag 'armsoc-fixes' of git://git./linux/kernel/git/soc/soc

Pull ARM SoC fixes from Olof Johansson:
"Here's the first batch of fixes for this release cycle.

  Main diffstat here is the re-deletion of netx. I messed up and most
  likely didn't remove the files from the index when I test-merged this
  and saw conflicts, and from there on out 'git rerere' remembered the
  mistake and I missed checking it. Here it's done again as expected.

  Besides that:

   - A defconfig refresh + enabling of new drivers for u8500

   - i.MX fixlets for i2c/SAI/pinmux

   - sleep.S build fix for Davinci

   - Broadcom devicetree build/warning fix"

* tag 'armsoc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc:
  ARM: defconfig: u8500: Add new drivers
  ARM: defconfig: u8500: Refresh defconfig
  ARM: dts: bcm: bcm47094: add missing #cells for mdio-bus-mux
  ARM: davinci: fix sleep.S build error on ARMv4
  arm64: dts: imx8mq: fix SAI compatible
  arm64: dts: imx8mm: Correct SAI3 RXC/TXFS pin's mux option #1
  ARM: dts: imx6ul: fix clock frequency property name of I2C buses
  ARM: Delete netx a second time
  ARM: dts: imx7ulp: Fix usb-phy unit address format

Merge branch 'x86-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull x86 fixes from Thomas Gleixner:
"A set of x86 fixes and functional updates:

   - Prevent stale huge I/O TLB mappings on 32bit. A long standing bug
     which got exposed by KPTI support for 32bit

   - Prevent bogus access_ok() warnings in arch_stack_walk_user()

   - Add display quirks for Lenovo devices which have height and width
     swapped

   - Add the missing CR2 fixup for 32 bit async pagefaults. Fallout of
     the CR2 bug fix series.

   - Unbreak handling of force enabled HPET by moving the 'is HPET
     counting' check back to the original place.

   - A more accurate check for running on a hypervisor platform in the
     MDS mitigation code. Not perfect, but more accurate than the
     previous one.

   - Update a stale and confusing comment vs. IRQ stacks"

* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/speculation/mds: Apply more accurate check on hypervisor platform
  x86/hpet: Undo the early counter is counting check
  x86/entry/32: Pass cr2 to do_async_page_fault()
  x86/irq/64: Update stale comment
  x86/sysfb_efi: Add quirks for some devices with swapped width and height
  x86/stacktrace: Prevent access_ok() warnings in arch_stack_walk_user()
  mm/vmalloc: Sync unmappings in __purge_vmap_area_lazy()
  x86/mm: Sync also unmappings in vmalloc_sync_all()
  x86/mm: Check for pfn instead of page in vmalloc_sync_one()

Merge branch 'sched-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull scheduler fixes from Thomas Gleixner:
"Two fixes for the fair scheduling class:

   - Prevent freeing memory which is accessible by concurrent readers

   - Make the RCU annotations for numa groups consistent"

* 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  sched/fair: Use RCU accessors consistently for ->numa_group
  sched/fair: Don't free p->numa_faults with concurrent readers

Merge branch 'perf-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull perf fixes from Thomas Gleixner:
"A pile of perf related fixes:

  Kernel:
   - Fix SLOTS PEBS event constraints for Icelake CPUs

   - Add the missing mask bit to allow counting hardware generated
     prefetches on L3 for Icelake CPUs

   - Make the test for hypervisor platforms more accurate (as far as
     possible)

   - Handle PMUs correctly which override event->cpu

   - Yet another missing fallthrough annotation

  Tools:
     perf.data:
        - Fix loading of compressed data split across adjacent records
        - Fix buffer size setting for processing CPU topology perf.data
          header.

     perf stat:
        - Fix segfault for event group in repeat mode
        - Always separate "stalled cycles per insn" line, it was being
          appended to the "instructions" line.

     perf script:
        - Fix --max-blocks man page description.
        - Improve man page description of metrics.
        - Fix off by one in brstackinsn IPC computation.

     perf probe:
        - Avoid calling freeing routine multiple times for same pointer.

     perf build:
        - Do not use -Wshadow on gcc < 4.8, avoiding too strict warnings
          treated as errors, breaking the build"

* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  perf/x86/intel: Mark expected switch fall-throughs
  perf/core: Fix creating kernel counters for PMUs that override event->cpu
  perf/x86: Apply more accurate check on hypervisor platform
  perf/x86/intel: Fix invalid Bit 13 for Icelake MSR_OFFCORE_RSP_x register
  perf/x86/intel: Fix SLOTS PEBS event constraint
  perf build: Do not use -Wshadow on gcc < 4.8
  perf probe: Avoid calling freeing routine multiple times for same pointer
  perf probe: Set pev->nargs to zero after freeing pev->args entries
  perf session: Fix loading of compressed data split across adjacent records
  perf stat: Always separate stalled cycles per insn
  perf stat: Fix segfault for event group in repeat mode
  perf tools: Fix proper buffer size for feature processing
  perf script: Fix off by one in brstackinsn IPC computation
  perf script: Improve man page description of metrics
  perf script: Fix --max-blocks man page description

Merge branch 'locking-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull locking fixes from Thomas Gleixner:
"A set of locking fixes:

   - Address the fallout of the rwsem rework. Missing ACQUIREs and a
     sanity check to prevent a use-after-free

   - Add missing checks for unitialized mutexes when mutex debugging is
     enabled.

   - Remove the bogus code in the generic SMP variant of
     arch_futex_atomic_op_inuser()

   - Fixup the #ifdeffery in lockdep to prevent compile warnings"

* 'locking-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  locking/mutex: Test for initialized mutex
  locking/lockdep: Clean up #ifdef checks
  locking/lockdep: Hide unused 'class' variable
  locking/rwsem: Add ACQUIRE comments
  tty/ldsem, locking/rwsem: Add missing ACQUIRE to read_failed sleep loop
  lcoking/rwsem: Add missing ACQUIRE to read_slowpath sleep loop
  locking/rwsem: Add missing ACQUIRE to read_slowpath exit when queue is empty
  locking/rwsem: Don't call owner_on_cpu() on read-owner
  futex: Cleanup generic SMP variant of arch_futex_atomic_op_inuser()

Merge branch 'core-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull objtool fix from Thomas Gleixner:
"A single robustness fix for objtool to handle unbalanced CLAC
invocations under all circumstances"

* 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
objtool: Improve UACCESS coverage

Merge tag 'Wimplicit-fallthrough-5.3-rc2' of git://git./linux/kernel/git/gustavoars/linux

Pull Wimplicit-fallthrough enablement from Gustavo A. R. Silva:
"This marks switch cases where we are expecting to fall through, and
  globally enables the -Wimplicit-fallthrough option in the main
  Makefile.

  Finally, some missing-break fixes that have been tagged for -stable:

   - drm/amdkfd: Fix missing break in switch statement

   - drm/amdgpu/gfx10: Fix missing break in switch statement

  With these changes, we completely get rid of all the fall-through
  warnings in the kernel"

* tag 'Wimplicit-fallthrough-5.3-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gustavoars/linux:
  Makefile: Globally enable fall-through warning
  drm/i915: Mark expected switch fall-throughs
  drm/amd/display: Mark expected switch fall-throughs
  drm/amdkfd/kfd_mqd_manager_v10: Avoid fall-through warning
  drm/amdgpu/gfx10: Fix missing break in switch statement
  drm/amdkfd: Fix missing break in switch statement
  perf/x86/intel: Mark expected switch fall-throughs
  mtd: onenand_base: Mark expected switch fall-through
  afs: fsclient: Mark expected switch fall-throughs
  afs: yfsclient: Mark expected switch fall-throughs
  can: mark expected switch fall-throughs
  firewire: mark expected switch fall-throughs

Merge tag 's390-5.3-3' of git://git./linux/kernel/git/s390/linux

Pull s390 updates from Heiko Carstens:

- Add ABI to kernel image file which allows e.g. the file utility to
   figure out the kernel version.

- Wire up clone3 system call.

- Add support for kasan bitops instrumentation.

- uapi header cleanup: use __u{16,32,64} instead of uint{16,32,64}_t.

- Provide proper ARCH_ZONE_DMA_BITS so the s390 DMA zone is correctly
   defined with 2 GB instead of the default value of 1 MB.

- Farhan Ali leaves the group of vfio-ccw maintainers.

- Various small vfio-ccw fixes.

- Add missing locking for airq_areas array in virtio code.

- Minor qdio improvements.

* tag 's390-5.3-3' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
  MAINTAINERS: vfio-ccw: Remove myself as the maintainer
  s390/mm: use shared variables for sysctl range check
  virtio/s390: fix race on airq_areas[]
  s390/dma: provide proper ARCH_ZONE_DMA_BITS value
  s390/kasan: add bitops instrumentation
  s390/bitops: make test functions return bool
  s390: wire up clone3 system call
  kbuild: enable arch/s390/include/uapi/asm/zcrypt.h for uapi header test
  s390: use __u{16,32,64} instead of uint{16,32,64}_t in uapi header
  s390/hypfs: fix a typo in the name of a function
  s390/qdio: restrict QAOB usage to IQD unicast queues
  s390/qdio: add sanity checks to the fast-requeue path
  s390: enable detection of kernel version from bzImage
  Documentation: fix vfio-ccw doc
  vfio-ccw: Update documentation for csch/hsch
  vfio-ccw: Don't call cp_free if we are processing a channel program
  vfio-ccw: Set pa_nr to 0 if memory allocation fails for pa_iova_pfn
  vfio-ccw: Fix memory leak and don't call cp_free in cp_init
  vfio-ccw: Fix misleading comment when setting orb.cmd.c64

Merge tag 'devicetree-fixes-for-5.3-2' of git://git./linux/kernel/git/robh/linux

Pull Devicetree fixes from Rob Herring:
"The nvmem changes would typically go thru Greg's tree, but they were
  missed in the merge window. [ Acked by Greg ]

  Summary:

   - Fix mismatches in $id values and actual filenames. Now checked by
     tools.

   - Convert nvmem binding to DT schema

   - Fix a typo in of_property_read_bool() kerneldoc

   - Remove some redundant description in al-fic interrupt-controller"

* tag 'devicetree-fixes-for-5.3-2' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux:
  dt-bindings: Fix more $id value mismatches filenames
  dt-bindings: nvmem: SID: Fix the examples node names
  dt-bindings: nvmem: Add YAML schemas for the generic NVMEM bindings
  of: Fix typo in kerneldoc
  dt-bindings: interrupt-controller: al-fic: remove redundant binding
  dt-bindings: clk: allwinner,sun4i-a10-ccu: Correct path in $id

Merge tag 'libnvdimm-fixes-5.3-rc2' of git://git./linux/kernel/git/nvdimm/nvdimm

Pull libnvdimm fixes from Dan Williams:
"A collection of locking and async operations fixes for v5.3-rc2. These
  had been soaking in a branch targeting the merge window, but missed
  due to a regression hunt. This fixed up version has otherwise been in
  -next this past week with no reported issues.

  In order to gain confidence in the locking changes the pull also
  includes a debug / instrumentation patch to enable lockdep coverage
  for libnvdimm subsystem operations that depend on the device_lock for
  exclusion. As mentioned in the changelog it is a hack, but it works
  and documents the locking expectations of the sub-system in a way that
  others can use lockdep to verify. The driver core touches got an ack
  from Greg.

  Summary:

   - Fix duplicate device_unregister() calls (multiple threads competing
     to do unregister work when scheduling device removal from a sysfs
     attribute of the self-same device).

   - Fix badblocks registration order bug. Ensure region badblocks are
     initialized in advance of namespace registration.

   - Fix a deadlock between the bus lock and probe operations.

   - Export device-core infrastructure to coordinate async operations
     via the device ->dead state.

   - Add device-core infrastructure to validate device_lock() usage with
     lockdep"

* tag 'libnvdimm-fixes-5.3-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm:
  driver-core, libnvdimm: Let device subsystems add local lockdep coverage
  libnvdimm/bus: Fix wait_nvdimm_bus_probe_idle() ABBA deadlock
  libnvdimm/bus: Stop holding nvdimm_bus_list_mutex over __nd_ioctl()
  libnvdimm/bus: Prepare the nd_ioctl() path to be re-entrant
  libnvdimm/region: Register badblocks before namespaces
  libnvdimm/bus: Prevent duplicate device_unregister() calls
  drivers/base: Introduce kill_device()

kbuild: remove unused single-used-m

This is unused since commit 9f69a496f100 ("kbuild: split out *.mod out
of {single,multi}-used-m rules").

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>

gen_compile_commands: lower the entry count threshold

Running gen_compile_commands.py after building the kernel with
allnoconfig gave this:

$ ./scripts/gen_compile_commands.py
WARNING: Found 449 entries. Have you compiled the kernel?

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>

.gitignore: Add compilation database file

This file is used by clangd to use language server protocol.
It can be generated at each compile using scripts/gen_compile_commands.py.
Therefore it is different depending on the environment and should be
ignored.

Signed-off-by: Toru Komatsu <k0ma@utam0k.jp>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>

kbuild: remove unused objectify macro

Commit 415008af3219 ("docs-rst: convert lsm from DocBook to ReST")
removed the last users of this macro.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>

Merge tag 'for-linus-20190726-2' of git://git.kernel.dk/linux-block

Pull block DMA segment fix from Jens Axboe:
"Here's the virtual boundary segment size fix"

* tag 'for-linus-20190726-2' of git://git.kernel.dk/linux-block:
block: fix max segment size handling in blk_queue_virt_boundary

Merge tag 'selinux-pr-20190726' of git://git./linux/kernel/git/pcmoore/selinux

Pull selinux fix from Paul Moore:
"One small SELinux patch to add some proper bounds/overflow checking
when adding a new sid/secid"

* tag 'selinux-pr-20190726' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/selinux:
selinux: check sidtab limit before adding a new entry

f2fs: fix to read source block before invalidating it

f2fs_allocate_data_block() invalidates old block address and enable new block
address. Then, if we try to read old block by f2fs_submit_page_bio(), it will
give WARN due to reading invalid blocks.

Let's make the order sanely back.

Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

dt-bindings: Fix more $id value mismatches filenames

The path in the schema '$id' values are wrong. Fix them.

Signed-off-by: Rob Herring <robh@kernel.org>

dt-bindings: nvmem: SID: Fix the examples node names

Now that the examples are validated, the examples in the SID binding
generates an error since the node names aren't one of the valid ones.

Let's switch for one that is ok.

Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>
Signed-off-by: Rob Herring <robh@kernel.org>

dt-bindings: nvmem: Add YAML schemas for the generic NVMEM bindings

The nvmem providers and consumers have a bunch of generic properties that
are needed in a device tree. Add a YAML schemas for those.

Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>
[Srini: Changed licence to (GPL-2.0 OR BSD-2-Clause)]
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Rob Herring <robh@kernel.org>

of: Fix typo in kerneldoc

"Findfrom" is not a word. Replace the function synopsis by something
that makes sense.

Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Rob Herring <robh@kernel.org>

Merge tag 'scsi-fixes' of git://git./linux/kernel/git/jejb/scsi

Pull SCSI fixes from James Bottomley:
"Nine fixes: The most important core one is the dma_max_mapping_size
  fix that corrects the boot problem Gunter Roeck was having. A couple
  of other driver only fixes are significant, like the cxgbi selector
  support addition, the alua 2 second delay and the fdomain build fix"

* tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
  scsi: scsi_dh_alua: always use a 2 second delay before retrying RTPG
  scsi: ibmvfc: fix WARN_ON during event pool release
  scsi: fcoe: fix a typo
  scsi: megaraid_sas: Make some functions static
  scsi: megaraid_sas: fix panic on loading firmware crashdump
  scsi: megaraid_sas: fix spelling mistake "megarid_sas" -> "megaraid_sas"
  scsi: core: fix the dma_max_mapping_size call
  scsi: fdomain: fix building pcmcia front-end
  scsi: target: cxgbit: add support for IEEE_8021QAZ_APP_SEL_STREAM selector

Merge tag 'drm-fixes-2019-07-26' of git://anongit.freedesktop.org/drm/drm

Pull drm fixes from Daniel Vetter:
"Dave seems to collect an entire streak of things happening, so again
  me typing pull summary.

  Nothing nefarious here, most of the fixes are for new stuff or things
  users won't see. The amd-display patches are a bit different, and very
  much look like they should have at least some cc: stable tags. Might
  be amd is a bit too comfortable with their internal tree and not
  enough looking at upstream. Dave&me are looking into this, in case
  something needs rectified with process here.

  Also no intel fixes pull, but intel CI is general become rather good,
  still I guess expect a notch more for -rc3.

  Summary:

  amdgpu:
   - fixes for (new in 5.3) hw support (vega20, navi)
   - disable RAS
   - lots of display fixes all over (audio, DSC, dongle, clock mgr)

  ttm:
   - fix dma_free_attrs calls to appease dma debugging

  msm:
   - fixes for dma-api, locking debug and compiler splats

  core:
   - fix cmdline mode to not apply rotation if not specified (new in 5.3)
   - compiler warn fix"

* tag 'drm-fixes-2019-07-26' of git://anongit.freedesktop.org/drm/drm: (46 commits)
  drm/amd/display: Set enabled to false at start of audio disable
  drm/amdgpu/smu: move fan rpm query into the asic specific code
  drm/amd/powerplay: custom peak clock freq for navi10
  drm: silence variable 'conn' set but not used
  drm/msm: stop abusing dma_map/unmap for cache
  drm/msm/dpu: Correct dpu encoder spinlock initialization
  drm/msm: correct NULL pointer dereference in context_init
  drm/amd/display: handle active dongle port type is DP++ or DP case
  drm/amd/display: do not read link setting if edp not connected
  drm/amd/display: Increase size of audios array
  drm/amd/display: drop ASSERT() if eDP panel is not connected
  drm/amd/display: Only enable audio if speaker allocation exists
  drm/amd/display: Fix dc_create failure handling and 666 color depths
  drm/amd/display: allocate 4 ddc engines for RV2
  drm/amd/display: put back front end initialization sequence
  drm/amd/display: Wait for flip to complete
  drm/amd/display: Change min_h_sync_width from 8 to 4
  drm/amd/display: use encoder's engine id to find matched free audio device
  drm/amd/display: fix DMCU hang when going into Modern Standby
  drm/amd/display: Disable Audio on reinitialize hardware
  ...

block: fix max segment size handling in blk_queue_virt_boundary

We should only set the max segment size to unlimited if we actually
have a virt boundary. Otherwise we accidentally clear that limit
when called from the SCSI midlayer, which always calls
blk_queue_virt_boundary, even if that mask is 0.

Fixes: 7ad388d8e4c7 ("scsi: core: add a host / host template field for the virt boundary")
Reported-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

Merge tag 'docs-5.3-1' of git://git.lwn.net/linux

Pull documentation fixes from Jonathan Corbet:
"This is mostly a set of follow-on fixes from Mauro fixing various
  fallout from the massive RST conversion; a few other small fixes as
  well"

* tag 'docs-5.3-1' of git://git.lwn.net/linux: (21 commits)
  docs: phy: Drop duplicate 'be made'
  doc:it_IT: translations in process/
  docs/vm: transhuge: fix typo in madvise reference
  doc:it_IT: rephrase statement
  doc:it_IT: align translation to mainline
  docs: load_config.py: ensure subdirs end with "/"
  docs: virtual: add it to the documentation body
  docs: remove extra conf.py files
  docs: load_config.py: avoid needing a conf.py just due to LaTeX docs
  scripts/sphinx-pre-install: seek for Noto CJK fonts for pdf output
  scripts/sphinx-pre-install: cleanup Gentoo checks
  scripts/sphinx-pre-install: fix latexmk dependencies
  scripts/sphinx-pre-install: don't use LaTeX with CentOS 7
  scripts/sphinx-pre-install: fix script for RHEL/CentOS
  docs: conf.py: only use CJK if the font is available
  docs: conf.py: add CJK package needed by translations
  docs: pdf: add all Documentation/*/index.rst to PDF output
  docs: fix broken doc references due to renames
  docs: power: add it to to the main documentation index
  docs: powerpc: convert docs to ReST and rename to *.rst
  ...

Merge tag 'arm64-fixes' of git://git./linux/kernel/git/arm64/linux

Pull arm64 fixes from Will Deacon:
"There's more here than we usually have at this stage, but that's
  mainly down to the stacktrace changes which came in slightly too late
  for the merge window.

  Summary:

   - Big bad batch of MAINTAINERS updates

   - Fix handling of SP alignment fault exceptions

   - Fix PSTATE.SSBS handling on heterogeneous systems

   - Fix fallout from moving to the generic vDSO implementation

   - Fix stack unwinding in the face of frame corruption

   - Fix off-by-one in IORT code

   - Minor SVE cleanups"

* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
  ACPI/IORT: Fix off-by-one check in iort_dev_find_its_id()
  arm64: entry: SP Alignment Fault doesn't write to FAR_EL1
  arm64: Force SSBS on context switch
  MAINTAINERS: Update my email address
  MAINTAINERS: Update my email address
  MAINTAINERS: Fix spelling mistake in my name
  MAINTAINERS: Update my email address to @kernel.org
  arm64: mm: Drop pte_huge()
  arm64/sve: Fix a couple of magic numbers for the Z-reg count
  arm64/sve: Factor out FPSIMD to SVE state conversion
  arm64: stacktrace: Better handle corrupted stacks
  arm64: stacktrace: Factor out backtrace initialisation
  arm64: stacktrace: Constify stacktrace.h functions
  arm64: vdso: Cleanup Makefiles
  arm64: vdso: fix flip/flop vdso build bug
  arm64: vdso: Fix population of AT_SYSINFO_EHDR for compat vdso

Merge tag 'for-5.3-rc1-tag' of git://git./linux/kernel/git/kdave/linux

Pull btrfs fixes from David Sterba:
"Two regression fixes:

   - hangs caused by a missing barrier in the locking code

   - memory leaks of extent_state due to bad handling of a cached
     pointer"

* tag 'for-5.3-rc1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux:
  btrfs: fix extent_state leak in btrfs_lock_and_flush_ordered_range
  btrfs: Fix deadlock caused by missing memory barrier

Merge branch 'fixes' of git://git./linux/kernel/git/viro/vfs

Pull vfs umount_tree() leak fix from Al Viro:
"Fix braino introduced in 'switch the remnants of releasing the
  mountpoint away from fs_pin'.

  The most visible result is leaking struct mount when mounting btrfs,
  making it impossible to shut down"

* 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  fix the struct mount leak in umount_tree()

Merge tag 'for-linus-20190726' of git://git.kernel.dk/linux-block

Pull block fixes from Jens Axboe:

- Several io_uring fixes/improvements:
     - Blocking fix for O_DIRECT (me)
     - Latter page slowness for registered buffers (me)
     - Fix poll hang under certain conditions (me)
     - Defer sequence check fix for wrapped rings (Zhengyuan)
     - Mismatch in async inc/dec accounting (Zhengyuan)
     - Memory ordering issue that could cause stall (Zhengyuan)
      - Track sequential defer in bytes, not pages (Zhengyuan)

- NVMe pull request from Christoph

- Set of hang fixes for wbt (Josef)

- Redundant error message kill for libahci (Ding)

- Remove unused blk_mq_sched_started_request() and related ops (Marcos)

- drbd dynamic alloc shash descriptor to reduce stack use (Arnd)

- blkcg ->pd_stat() non-debug print (Tejun)

- bcache memory leak fix (Wei)

- Comment fix (Akinobu)

- BFQ perf regression fix (Paolo)

* tag 'for-linus-20190726' of git://git.kernel.dk/linux-block: (24 commits)
  io_uring: ensure ->list is initialized for poll commands
  Revert "nvme-pci: don't create a read hctx mapping without read queues"
  nvme: fix multipath crash when ANA is deactivated
  nvme: fix memory leak caused by incorrect subsystem free
  nvme: ignore subnqn for ADATA SX6000LNP
  drbd: dynamically allocate shash descriptor
  block: blk-mq: Remove blk_mq_sched_started_request and started_request
  bcache: fix possible memory leak in bch_cached_dev_run()
  io_uring: track io length in async_list based on bytes
  io_uring: don't use iov_iter_advance() for fixed buffers
  block: properly handle IOCB_NOWAIT for async O_DIRECT IO
  blk-mq: allow REQ_NOWAIT to return an error inline
  io_uring: add a memory barrier before atomic_read
  rq-qos: use a mb for got_token
  rq-qos: set ourself TASK_UNINTERRUPTIBLE after we schedule
  rq-qos: don't reset has_sleepers on spurious wakeups
  rq-qos: fix missed wake-ups in rq_qos_throttle
  wait: add wq_has_single_sleeper helper
  block, bfq: check also in-flight I/O in dispatch plugging
  block: fix sysfs module parameters directory path in comment
  ...

Merge tag 'sound-5.3-rc2' of git://git./linux/kernel/git/tiwai/sound

Pull sound fixes from Takashi Iwai:
"All relatively small changes:

   - a regression fix for PCM link code with CONFIG_REFCOUNT_FULL;
     stumbled on a slight difference between atomic_t and refcount_t

   - a couple of HD-audio stabilization patches addressing the too slow
     PM resume seen on some Intel chips

   - a series of ALSA compress-offload API fixes, including the
     regression by the previous capture stream support

   - trivial LINE6 USB-audio driver fixes, a new Conexant HD-audio chip
     coverage, and a fix in AC97 bus error path"

* tag 'sound-5.3-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
  ALSA: hda - Add a conexant codec entry to let mute led work
  ALSA: hda - Fix intermittent CORB/RIRB stall on Intel chips
  ALSA: ac97: Fix double free of ac97_codec_device
  ALSA: compress: Be more restrictive about when a drain is allowed
  ALSA: compress: Don't allow paritial drain operations on capture streams
  ALSA: compress: Prevent bypasses of set_params
  ALSA: compress: Fix regression on compressed capture streams
  ALSA: line6: Fix a typo
  ALSA: pcm: Fix refcount_inc() on zero usage
  ALSA: line6: Fix wrong altsetting for LINE6_PODHD500_1
  ALSA: hda - Optimize resume for codecs without jack detection

Merge tag 'iommu-fixes-v5.3-rc1' of git://git./linux/kernel/git/joro/iommu

Pull IOMMU fixes from Joerg Roedel:

- revert an Intel VT-d patch that caused boot problems on some machines

- fix AMD IOMMU interrupts with x2apic enabled

- fix a potential crash when Intel VT-d domain allocation fails

- fix crash in Intel VT-d driver when accessing a domain without a
   flush queue

- formatting fix for new Intel VT-d debugfs code

- fix for use-after-free bug in IOVA code

- fix for a NULL-pointer dereference in Intel VT-d driver when PCI
   hotplug is used

- compilation fix for one of the previous fixes

* tag 'iommu-fixes-v5.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu:
  iommu/amd: Add support for X2APIC IOMMU interrupts
  iommu/iova: Fix compilation error with !CONFIG_IOMMU_IOVA
  iommu/vt-d: Print pasid table entries MSB to LSB in debugfs
  iommu/iova: Remove stale cached32_node
  iommu/vt-d: Check if domain->pgd was allocated
  iommu/vt-d: Don't queue_iova() if there is no flush queue
  iommu/vt-d: Avoid duplicated pci dma alias consideration
  Revert "iommu/vt-d: Consolidate domain_init() to avoid duplication"

Merge branch 'for-linus-5.3' of git://git./linux/kernel/git/konrad/ibft

Pull iscsi_ibft fix from Konrad Rzeszutek Wilk:
"One tiny fix to enable iSCSI IBFT to be compiled under ARM"

* 'for-linus-5.3' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/ibft:
iscsi_ibft: make ISCSI_IBFT depend on ACPI instead of ISCSI_IBFT_FIND

Merge tag 'hwmon-for-v5.3-rc2' of git://git./linux/kernel/git/groeck/linux-staging

Pull hwmon fixes from Guenter Roeck:
"A couple of hwmon bug fixes:

   - Update k8temp documentation URL

   - Register address fixes in nct6775 driver

   - Fix potential division by zero in occ driver"

* tag 'hwmon-for-v5.3-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging:
  hwmon: (k8temp) documentation: update URL of datasheet
  hwmon: (nct6775) Fix register address and added missed tolerance for nct6106
  hwmon: (occ) Fix division by zero issue

docs: phy: Drop duplicate 'be made'

Fix duplicate words.

Signed-off-by: Guido Günther <agx@sigxcpu.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>

fix the struct mount leak in umount_tree()

We need to drop everything we remove from the tree, whether
mnt_has_parent() is true or not. Usually the bug manifests as a slow
memory leak (leaked struct mount for initramfs); it becomes much more
visible in mount_subtree() users, such as btrfs. There we leak
a struct mount for btrfs superblock being mounted, which prevents
fs shutdown on subsequent umount.

Fixes: 56cbb429d911 ("switch the remnants of releasing the mountpoint away from fs_pin")
Reported-by: Nikolay Borisov <nborisov@suse.com>
Tested-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

vhost: disable metadata prefetch optimization

This seems to cause guest and host memory corruption.
Disable for now until we get a better handle on that.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

MAINTAINERS: vfio-ccw: Remove myself as the maintainer

I will not be able to continue with my maintainership responsibilities
going forward, so remove myself as the maintainer.

Signed-off-by: Farhan Ali <alifm@linux.ibm.com>
Acked-by: Cornelia Huck <cohuck@redhat.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>

s390/mm: use shared variables for sysctl range check

Since commit eec4844fae7c ("proc/sysctl: add shared variables for range
check") special shared variables are available for sysctl range check.
Reuse them for /proc/sys/vm/allocate_pgste proc handler.

Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>

virtio/s390: fix race on airq_areas[]

The access to airq_areas was racy ever since the adapter interrupts got
introduced to virtio-ccw, but since commit 39c7dcb15892 ("virtio/s390:
make airq summary indicators DMA") this became an issue in practice as
well. Namely before that commit the airq_info that got overwritten was
still functional. After that commit however the two infos share a
summary_indicator, which aggravates the situation. Which means
auto-online mechanism occasionally hangs the boot with virtio_blk.

Signed-off-by: Halil Pasic <pasic@linux.ibm.com>
Reported-by: Marc Hartmayer <mhartmay@linux.ibm.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Cc: stable@vger.kernel.org
Fixes: 96b14536d935 ("virtio-ccw: virtio-ccw adapter interrupt support.")
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>

s390/dma: provide proper ARCH_ZONE_DMA_BITS value

On s390 ZONE_DMA is up to 2G, i.e. ARCH_ZONE_DMA_BITS should be 31 bits.
The current value is 24 and makes __dma_direct_alloc_pages() take a
wrong turn first (but __dma_direct_alloc_pages() recovers then).

Let's correct ARCH_ZONE_DMA_BITS value and avoid wrong turns.

Signed-off-by: Halil Pasic <pasic@linux.ibm.com>
Reported-by: Petr Tesarik <ptesarik@suse.cz>
Fixes: c61e9637340e ("dma-direct: add support for allocation from ZONE_DMA and ZONE_DMA32")
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>

btrfs: fix extent_state leak in btrfs_lock_and_flush_ordered_range

btrfs_lock_and_flush_ordered_range() loads given "*cached_state" into
cachedp, which, in general, is NULL. Then, lock_extent_bits() updates
"cachedp", but it never goes backs to the caller. Thus the caller still
see its "cached_state" to be NULL and never free the state allocated
under btrfs_lock_and_flush_ordered_range(). As a result, we will
see massive state leak with e.g. fstests btrfs/005. Fix this bug by
properly handling the pointers.

Fixes: bd80d94efb83 ("btrfs: Always use a cached extent_state in btrfs_lock_and_flush_ordered_range")
Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: Naohiro Aota <naohiro.aota@wdc.com>
Signed-off-by: David Sterba <dsterba@suse.com>

Merge tag 'drm-fixes-5.3-2019-07-24' of git://people.freedesktop.org/~agd5f/linux into drm-fixes

drm-fixes-5.3-2019-07-24:

amdgpu:
- RAS fixes for vega20
- Navi VCN fix
- DC audio fixes
- DC DSC fixes
- DC dongle fixes
- DC clk mgr fixes
- Fix DDC lines on some RV2 boards
- GDS fixes for compute
- Navi SMU fixes

ttm:
- Use the same attributes when freeing d_page->vaddr

Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Alex Deucher <alexdeucher@gmail.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190724210527.3415-1-alexander.deucher@amd.com

Merge tag 'drm-misc-fixes-2019-07-25' of git://anongit.freedesktop.org/drm/drm-misc into drm-fixes

- pick up the cmdline fix which missed the merge window (Dmitry)
- a handful of msm fixes so i don't have to spin up msm-fixes (Various)
- fix -Wunused-but-set-variable warning in drm_framebuffer (Qian)

Cc: Dmitry Osipenko <digetx@gmail.com>
Cc: Rob Clark <robdclark@gmail.com>
Cc: Qian Cai <cai@lca.pw>
Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Sean Paul <sean@poorly.run>
Link: https://patchwork.freedesktop.org/patch/msgid/20190725160909.GA106249@art_vandelay

Makefile: Globally enable fall-through warning

Now that all the fall-through warnings have been addressed in the
kernel, enable the fall-through warning globally.

Also, update the deprecated.rst file to include implicit fall-through
as 'deprecated' so people can be pointed to a single location for
justification.

Cc: Masahiro Yamada <yamada.masahiro@socionext.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Michal Marek <michal.lkml@markovi.net>
Cc: Kees Cook <keescook@chromium.org>
Cc: linux-kbuild@vger.kernel.org
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>

drm/i915: Mark expected switch fall-throughs

In preparation to enabling -Wimplicit-fallthrough, mark switch
cases where we are expecting to fall through.

This patch fixes the following warnings:

drivers/gpu/drm/i915/gem/i915_gem_mman.c: In function ‘i915_gem_fault’:
drivers/gpu/drm/i915/gem/i915_gem_mman.c:342:6: warning: this statement may fall through [-Wimplicit-fallthrough=]
   if (!i915_terminally_wedged(i915))
      ^
drivers/gpu/drm/i915/gem/i915_gem_mman.c:345:2: note: here
  case -EAGAIN:
  ^~~~

drivers/gpu/drm/i915/gem/i915_gem_pages.c: In function ‘i915_gem_object_map’:
./include/linux/compiler.h:78:22: warning: this statement may fall through [-Wimplicit-fallthrough=]
# define unlikely(x) __builtin_expect(!!(x), 0)
                      ^~~~~~~~~~~~~~~~~~~~~~~~~~
./include/asm-generic/bug.h:136:2: note: in expansion of macro ‘unlikely’
  unlikely(__ret_warn_on);     \
  ^~~~~~~~
drivers/gpu/drm/i915/i915_utils.h:49:25: note: in expansion of macro ‘WARN’
#define MISSING_CASE(x) WARN(1, "Missing case (%s == %ld)\n", \
                         ^~~~
drivers/gpu/drm/i915/gem/i915_gem_pages.c:270:3: note: in expansion of macro ‘MISSING_CASE’
   MISSING_CASE(type);
   ^~~~~~~~~~~~
drivers/gpu/drm/i915/gem/i915_gem_pages.c:272:2: note: here
  case I915_MAP_WB:
  ^~~~

drivers/gpu/drm/i915/i915_gpu_error.c: In function ‘error_record_engine_registers’:
./include/linux/compiler.h:78:22: warning: this statement may fall through [-Wimplicit-fallthrough=]
# define unlikely(x) __builtin_expect(!!(x), 0)
                      ^~~~~~~~~~~~~~~~~~~~~~~~~~
./include/asm-generic/bug.h:136:2: note: in expansion of macro ‘unlikely’
  unlikely(__ret_warn_on);     \
  ^~~~~~~~
drivers/gpu/drm/i915/i915_utils.h:49:25: note: in expansion of macro ‘WARN’
#define MISSING_CASE(x) WARN(1, "Missing case (%s == %ld)\n", \
                         ^~~~
drivers/gpu/drm/i915/i915_gpu_error.c:1196:5: note: in expansion of macro ‘MISSING_CASE’
     MISSING_CASE(engine->id);
     ^~~~~~~~~~~~
drivers/gpu/drm/i915/i915_gpu_error.c:1197:4: note: here
    case RCS0:
    ^~~~

drivers/gpu/drm/i915/display/intel_dp.c: In function ‘intel_dp_get_fia_supported_lane_count’:
./include/linux/compiler.h:78:22: warning: this statement may fall through [-Wimplicit-fallthrough=]
# define unlikely(x) __builtin_expect(!!(x), 0)
                      ^~~~~~~~~~~~~~~~~~~~~~~~~~
./include/asm-generic/bug.h:136:2: note: in expansion of macro ‘unlikely’
  unlikely(__ret_warn_on);     \
  ^~~~~~~~
drivers/gpu/drm/i915/i915_utils.h:49:25: note: in expansion of macro ‘WARN’
#define MISSING_CASE(x) WARN(1, "Missing case (%s == %ld)\n", \
                         ^~~~
drivers/gpu/drm/i915/display/intel_dp.c:233:3: note: in expansion of macro ‘MISSING_CASE’
   MISSING_CASE(lane_info);
   ^~~~~~~~~~~~
drivers/gpu/drm/i915/display/intel_dp.c:234:2: note: here
  case 1:
  ^~~~

drivers/gpu/drm/i915/display/intel_display.c: In function ‘check_digital_port_conflicts’:
  CC [M]  drivers/gpu/drm/nouveau/nvkm/engine/disp/cursgv100.o
drivers/gpu/drm/i915/display/intel_display.c:12043:7: warning: this statement may fall through [-Wimplicit-fallthrough=]
    if (WARN_ON(!HAS_DDI(to_i915(dev))))
       ^
drivers/gpu/drm/i915/display/intel_display.c:12046:3: note: here
   case INTEL_OUTPUT_DP:
   ^~~~

Also, notice that the Makefile is modified to stop ignoring
fall-through warnings. The -Wimplicit-fallthrough option
will be enabled globally in v5.3.

Warning level 3 was used: -Wimplicit-fallthrough=3

This patch is part of the ongoing efforts to enable
-Wimplicit-fallthrough.

Reviewed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>

drm/amd/display: Mark expected switch fall-throughs

In preparation to enabling -Wimplicit-fallthrough, mark switch
cases where we are expecting to fall through.

Warning level 3 was used: -Wimplicit-fallthrough=3

This patch is part of the ongoing efforts to enable -Wimplicit-fallthrough.

Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>

drm/amdkfd/kfd_mqd_manager_v10: Avoid fall-through warning

In preparation to enabling -Wimplicit-fallthrough, this patch silences
the following warning:

drivers/gpu/drm/amd/amdgpu/../amdkfd/kfd_mqd_manager_v10.c: In function ‘mqd_manager_init_v10’:
./include/linux/dynamic_debug.h:122:52: warning: this statement may fall through [-Wimplicit-fallthrough=]
#define __dynamic_func_call(id, fmt, func, ...) do { \
                                                    ^
./include/linux/dynamic_debug.h:143:2: note: in expansion of macro ‘__dynamic_func_call’
  __dynamic_func_call(__UNIQUE_ID(ddebug), fmt, func, ##__VA_ARGS__)
  ^~~~~~~~~~~~~~~~~~~
./include/linux/dynamic_debug.h:153:2: note: in expansion of macro ‘_dynamic_func_call’
  _dynamic_func_call(fmt, __dynamic_pr_debug,  \
  ^~~~~~~~~~~~~~~~~~
./include/linux/printk.h:336:2: note: in expansion of macro ‘dynamic_pr_debug’
  dynamic_pr_debug(fmt, ##__VA_ARGS__)
  ^~~~~~~~~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../amdkfd/kfd_mqd_manager_v10.c:432:3: note: in expansion of macro ‘pr_debug’
   pr_debug("%s@%i\n", __func__, __LINE__);
   ^~~~~~~~
drivers/gpu/drm/amd/amdgpu/../amdkfd/kfd_mqd_manager_v10.c:433:2: note: here
  case KFD_MQD_TYPE_COMPUTE:
  ^~~~

by removing the call to pr_debug() in KFD_MQD_TYPE_CP:

"The mqd init for CP and COMPUTE will have the same  routine." [1]

This bug was found thanks to the ongoing efforts to enable
-Wimplicit-fallthrough.

[1] https://lore.kernel.org/lkml/c735a1cc-a545-50fb-44e7-c0ad93ee8ee7@amd.com/

Reviewed-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>

drm/amdgpu/gfx10: Fix missing break in switch statement

Add missing break statement in order to prevent the code from falling
through to case AMDGPU_IRQ_STATE_ENABLE.

This bug was found thanks to the ongoing efforts to enable
-Wimplicit-fallthrough.

Fixes: a644d85a5cd4 ("drm/amdgpu: add gfx v10 implementation (v10)")
Cc: stable@vger.kernel.org
Reviewed-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>

drm/amdkfd: Fix missing break in switch statement

Add missing break statement in order to prevent the code from falling
through to case CHIP_NAVI10.

This bug was found thanks to the ongoing efforts to enable
-Wimplicit-fallthrough.

Fixes: 14328aa58ce5 ("drm/amdkfd: Add navi10 support to amdkfd. (v3)")
Cc: stable@vger.kernel.org
Reviewed-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>

perf/x86/intel: Mark expected switch fall-throughs

In preparation to enabling -Wimplicit-fallthrough, mark switch
cases where we are expecting to fall through.

This patch fixes the following warnings:

arch/x86/events/intel/core.c: In function ‘intel_pmu_init’:
arch/x86/events/intel/core.c:4959:8: warning: this statement may fall through [-Wimplicit-fallthrough=]
   pmem = true;
   ~~~~~^~~~~~
arch/x86/events/intel/core.c:4960:2: note: here
  case INTEL_FAM6_SKYLAKE_MOBILE:
  ^~~~
arch/x86/events/intel/core.c:5008:8: warning: this statement may fall through [-Wimplicit-fallthrough=]
   pmem = true;
   ~~~~~^~~~~~
arch/x86/events/intel/core.c:5009:2: note: here
  case INTEL_FAM6_ICELAKE_MOBILE:
  ^~~~

Warning level 3 was used: -Wimplicit-fallthrough=3

This patch is part of the ongoing efforts to enable
-Wimplicit-fallthrough.

Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>

mtd: onenand_base: Mark expected switch fall-through

In preparation to enabling -Wimplicit-fallthrough, mark switch cases
where we are expecting to fall through.

This patch fixes the following warning:

drivers/mtd/nand/onenand/onenand_base.c: In function ‘onenand_check_features’:
drivers/mtd/nand/onenand/onenand_base.c:3264:17: warning: this statement may fall through [-Wimplicit-fallthrough=]
   this->options |= ONENAND_HAS_NOP_1;
drivers/mtd/nand/onenand/onenand_base.c:3265:2: note: here
  case ONENAND_DEVICE_DENSITY_4Gb:
  ^~~~

Warning level 3 was used: -Wimplicit-fallthrough=3

This patch is part of the ongoing efforts to enable
-Wimplicit-fallthrough.

Cc: Jonathan Bakker <xc-racer2@live.ca>
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>

afs: fsclient: Mark expected switch fall-throughs

In preparation to enabling -Wimplicit-fallthrough, mark switch
cases where we are expecting to fall through.

This patch fixes the following warnings:

Warning level 3 was used: -Wimplicit-fallthrough=3

fs/afs/fsclient.c: In function ‘afs_deliver_fs_fetch_acl’:
fs/afs/fsclient.c:2199:19: warning: this statement may fall through [-Wimplicit-fallthrough=]
   call->unmarshall++;
   ~~~~~~~~~~~~~~~~^~
fs/afs/fsclient.c:2202:2: note: here
  case 1:
  ^~~~
fs/afs/fsclient.c:2216:19: warning: this statement may fall through [-Wimplicit-fallthrough=]
   call->unmarshall++;
   ~~~~~~~~~~~~~~~~^~
fs/afs/fsclient.c:2219:2: note: here
  case 2:
  ^~~~
fs/afs/fsclient.c:2225:19: warning: this statement may fall through [-Wimplicit-fallthrough=]
   call->unmarshall++;
   ~~~~~~~~~~~~~~~~^~
fs/afs/fsclient.c:2228:2: note: here
  case 3:
  ^~~~

This patch is part of the ongoing efforts to enable
-Wimplicit-fallthrough.

Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>

afs: yfsclient: Mark expected switch fall-throughs

In preparation to enabling -Wimplicit-fallthrough, mark switch
cases where we are expecting to fall through.

This patch fixes the following warnings:

fs/afs/yfsclient.c: In function ‘yfs_deliver_fs_fetch_opaque_acl’:
fs/afs/yfsclient.c:1984:19: warning: this statement may fall through [-Wimplicit-fallthrough=]
   call->unmarshall++;
   ~~~~~~~~~~~~~~~~^~
fs/afs/yfsclient.c:1987:2: note: here
  case 1:
  ^~~~
fs/afs/yfsclient.c:2005:19: warning: this statement may fall through [-Wimplicit-fallthrough=]
   call->unmarshall++;
   ~~~~~~~~~~~~~~~~^~
fs/afs/yfsclient.c:2008:2: note: here
  case 2:
  ^~~~
fs/afs/yfsclient.c:2014:19: warning: this statement may fall through [-Wimplicit-fallthrough=]
   call->unmarshall++;
   ~~~~~~~~~~~~~~~~^~
fs/afs/yfsclient.c:2017:2: note: here
  case 3:
  ^~~~
fs/afs/yfsclient.c:2035:19: warning: this statement may fall through [-Wimplicit-fallthrough=]
   call->unmarshall++;
   ~~~~~~~~~~~~~~~~^~
fs/afs/yfsclient.c:2038:2: note: here
  case 4:
  ^~~~
fs/afs/yfsclient.c:2047:19: warning: this statement may fall through [-Wimplicit-fallthrough=]
   call->unmarshall++;
   ~~~~~~~~~~~~~~~~^~
fs/afs/yfsclient.c:2050:2: note: here
  case 5:
  ^~~~

Warning level 3 was used: -Wimplicit-fallthrough=3

Also, fix some commenting style issues.

This patch is part of the ongoing efforts to enable
-Wimplicit-fallthrough.

Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>

can: mark expected switch fall-throughs

In preparation to enabling -Wimplicit-fallthrough, mark switch cases
where we are expecting to fall through.

This patch fixes the following warnings:

drivers/net/can/peak_canfd/peak_pciefd_main.c:668:3: warning: this statement may fall through [-Wimplicit-fallthrough=]
drivers/net/can/spi/mcp251x.c:875:7: warning: this statement may fall through [-Wimplicit-fallthrough=]
drivers/net/can/usb/peak_usb/pcan_usb.c:422:6: warning: this statement may fall through [-Wimplicit-fallthrough=]
drivers/net/can/at91_can.c:895:6: warning: this statement may fall through [-Wimplicit-fallthrough=]
drivers/net/can/at91_can.c:953:15: warning: this statement may fall through [-Wimplicit-fallthrough=]
drivers/net/can/usb/peak_usb/pcan_usb.c: In function ‘pcan_usb_decode_error’:
drivers/net/can/usb/peak_usb/pcan_usb.c:422:6: warning: this statement may fall through [-Wimplicit-fallthrough=]
   if (n & PCAN_USB_ERROR_BUS_LIGHT) {
      ^
drivers/net/can/usb/peak_usb/pcan_usb.c:428:2: note: here
  case CAN_STATE_ERROR_WARNING:
  ^~~~

Warning level 3 was used: -Wimplicit-fallthrough=3

This patch is part of the ongoing efforts to enabling
-Wimplicit-fallthrough.

Notice that in some cases spelling mistakes were fixed.
In other cases, the /* fall through */ comment is placed
at the bottom of the case statement, which is what GCC
is expecting to find.

Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>

firewire: mark expected switch fall-throughs

In preparation to enabling -Wimplicit-fallthrough, mark switch
cases where we are expecting to fall through.

This patch fixes the following warnings:

drivers/firewire/core-device.c: In function ‘set_broadcast_channel’:
drivers/firewire/core-device.c:969:7: warning: this statement may fall through [-Wimplicit-fallthrough=]
    if (data & cpu_to_be32(1 << 31)) {
       ^
drivers/firewire/core-device.c:974:3: note: here
   case RCODE_ADDRESS_ERROR:
   ^~~~
drivers/firewire/core-iso.c: In function ‘manage_channel’:
drivers/firewire/core-iso.c:308:7: warning: this statement may fall through [-Wimplicit-fallthrough=]
    if ((data[0] & bit) == (data[1] & bit))
       ^
drivers/firewire/core-iso.c:312:3: note: here
   default:
   ^~~~~~~
drivers/firewire/core-topology.c: In function ‘count_ports’:
drivers/firewire/core-topology.c:69:23: warning: this statement may fall through [-Wimplicit-fallthrough=]
    (*child_port_count)++;
    ~~~~~~~~~~~~~~~~~~~^~
drivers/firewire/core-topology.c:70:3: note: here
   case SELFID_PORT_PARENT:
   ^~~~

Warning level 3 was used: -Wimplicit-fallthrough=3

Notice that in some cases, the code comment is modified in
accordance with what GCC is expecting to find.

This patch is part of the ongoing efforts to enable
-Wimplicit-fallthrough.

Cc: Kees Cook <keescook@chromium.org>
Cc: Mathieu Malaterre <malat@debian.org>
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de> (reworded a comment)
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>

structleak: disable STRUCTLEAK_BYREF in combination with KASAN_STACK

The combination of KASAN_STACK and GCC_PLUGIN_STRUCTLEAK_BYREF
leads to much larger kernel stack usage, as seen from the warnings
about functions that now exceed the 2048 byte limit:

drivers/media/i2c/tvp5150.c:253:1: error: the frame size of 3936 bytes is larger than 2048 bytes
drivers/media/tuners/r820t.c:1327:1: error: the frame size of 2816 bytes is larger than 2048 bytes
drivers/net/wireless/broadcom/brcm80211/brcmsmac/phy/phy_n.c:16552:1: error: the frame size of 3144 bytes is larger than 2048 bytes [-Werror=frame-larger-than=]
fs/ocfs2/aops.c:1892:1: error: the frame size of 2088 bytes is larger than 2048 bytes
fs/ocfs2/dlm/dlmrecovery.c:737:1: error: the frame size of 2088 bytes is larger than 2048 bytes
fs/ocfs2/namei.c:1677:1: error: the frame size of 2584 bytes is larger than 2048 bytes
fs/ocfs2/super.c:1186:1: error: the frame size of 2640 bytes is larger than 2048 bytes
fs/ocfs2/xattr.c:3678:1: error: the frame size of 2176 bytes is larger than 2048 bytes
net/bluetooth/l2cap_core.c:7056:1: error: the frame size of 2144 bytes is larger than 2048 bytes [-Werror=frame-larger-than=]
net/bluetooth/l2cap_core.c: In function 'l2cap_recv_frame':
net/bridge/br_netlink.c:1505:1: error: the frame size of 2448 bytes is larger than 2048 bytes
net/ieee802154/nl802154.c:548:1: error: the frame size of 2232 bytes is larger than 2048 bytes
net/wireless/nl80211.c:1726:1: error: the frame size of 2224 bytes is larger than 2048 bytes
net/wireless/nl80211.c:2357:1: error: the frame size of 4584 bytes is larger than 2048 bytes
net/wireless/nl80211.c:5108:1: error: the frame size of 2760 bytes is larger than 2048 bytes
net/wireless/nl80211.c:6472:1: error: the frame size of 2112 bytes is larger than 2048 bytes

The structleak plugin was previously disabled for CONFIG_COMPILE_TEST,
but meant we missed some bugs, so this time we should address them.

The frame size warnings are distracting, and risking a kernel stack
overflow is generally not beneficial to performance, so it may be best
to disallow that particular combination. This can be done by turning
off either one. I picked the dependency in GCC_PLUGIN_STRUCTLEAK_BYREF
and GCC_PLUGIN_STRUCTLEAK_BYREF_ALL, as this option is designed to
make uninitialized stack usage less harmful when enabled on its own,
but it also prevents KASAN from detecting those cases in which it was
in fact needed.

KASAN_STACK is currently implied by KASAN on gcc, but could be made a
user selectable option if we want to allow combining (non-stack) KASAN
with GCC_PLUGIN_STRUCTLEAK_BYREF.

Note that it would be possible to specifically address the files that
print the warning, but presumably the overall stack usage is still
significantly higher than in other configurations, so this would not
address the full problem.

I could not test this with CONFIG_INIT_STACK_ALL, which may or may not
suffer from a similar problem.

Fixes: 81a56f6dcd20 ("gcc-plugins: structleak: Generalize to all variable types")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Link: https://lore.kernel.org/r/20190722114134.3123901-1-arnd@arndb.de
Signed-off-by: Kees Cook <keescook@chromium.org>

nouveau: unlock mmap_sem on all errors from nouveau_range_fault

Currently nouveau_svm_fault expects nouveau_range_fault to never unlock
mmap_sem, but the latter unlocks it for a random selection of error
codes. Fix this up by always unlocking mmap_sem for non-zero return values
in nouveau_range_fault, and only unlocking it in the caller for successful
returns.

Link: https://lore.kernel.org/r/20190724065258.16603-5-hch@lst.de
Tested-by: Ralph Campbell <rcampbell@nvidia.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Jason Gunthorpe <jgg@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>

nouveau: remove the block parameter to nouveau_range_fault

The parameter is always false, so remove it as well as the -EAGAIN
handling that can only happen for the non-blocking case.

Link: https://lore.kernel.org/r/20190724065258.16603-4-hch@lst.de
Tested-by: Ralph Campbell <rcampbell@nvidia.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Jason Gunthorpe <jgg@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>

mm/hmm: move hmm_vma_range_done and hmm_vma_fault to nouveau

These two functions are marked as a legacy APIs to get rid of, but seem to
suit the current nouveau flow. Move it to the only user in preparation
for fixing a locking bug involving caller and callee. All comments
referring to the old API have been removed as this now is a driver private
helper.

Link: https://lore.kernel.org/r/20190724065258.16603-3-hch@lst.de
Tested-by: Ralph Campbell <rcampbell@nvidia.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Jason Gunthorpe <jgg@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>

mm/hmm: always return EBUSY for invalid ranges in hmm_range_{fault,snapshot}

We should not have two different error codes for the same
condition. EAGAIN must be reserved for the FAULT_FLAG_ALLOW_RETRY retry
case and signals to the caller that the mmap_sem has been unlocked.

Use EBUSY for the !valid case so that callers can get the locking right.

Link: https://lore.kernel.org/r/20190724065258.16603-2-hch@lst.de
Tested-by: Ralph Campbell <rcampbell@nvidia.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Ralph Campbell <rcampbell@nvidia.com>
Reviewed-by: Jason Gunthorpe <jgg@mellanox.com>
Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
[jgg: elaborated commit message]
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>

platform/x86: intel_pmc_core: Add ICL-NNPI support to PMC Core

Ice Lake Neural Network Processor for deep learning inference a.k.a.
ICL-NNPI can re-use Ice Lake Mobile regmap to enable Intel PMC Core
driver on it.

Cc: Darren Hart <dvhart@infradead.org>
Cc: Andy Shevchenko <andy@infradead.org>
Cc: platform-driver-x86@vger.kernel.org
Link: https://lkml.org/lkml/2019/6/5/1034
Signed-off-by: Rajneesh Bhardwaj <rajneesh.bhardwaj@linux.intel.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>

Platform: OLPC: add SPI MODULE_DEVICE_TABLE

The SPI bus creates a device with the modalias of "xo1.75-ec". This
fixes XO-1.75 EC driver autoloading

Fixes: 0c3d931b3ab9 ("Platform: OLPC: Add XO-1.75 EC driver")
Signed-off-by: Lubomir Rintel <lkundrak@v3.sk>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>

platform/x86: wmi: add missing struct parameter description

Add a description for the context parameter in the struct wmi_device_id.

Reported-by: kbuild test robot <lkp@intel.com>
Fixes: a48e23385fcf ("platform/x86: wmi: add context pointer field to struct wmi_device_id")
Signed-off-by: Mattias Jacobsson <2pi@mok.nu>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>

platform/x86: pcengines-apuv2: Fix softdep statement

Only first MODULE_SOFTDEP statement is handled per module.
Multiple dependencies must be expressed in a single statement.

Signed-off-by: Jean Delvare <jdelvare@suse.de>
Cc: "Enrico Weigelt, metux IT consult" <info@metux.net>
Cc: Darren Hart <dvhart@infradead.org>
Cc: Andy Shevchenko <andy@infradead.org>
[andy: massaged commit message]
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>

Merge branch 'nvme-5.3' of git://git.infradead.org/nvme into for-linus

Pull NVMe fixes from Christoph.

* 'nvme-5.3' of git://git.infradead.org/nvme:
  Revert "nvme-pci: don't create a read hctx mapping without read queues"
  nvme: fix multipath crash when ANA is deactivated
  nvme: fix memory leak caused by incorrect subsystem free
  nvme: ignore subnqn for ADATA SX6000LNP

io_uring: ensure ->list is initialized for poll commands

Daniel reports that when testing an http server that uses io_uring
to poll for incoming connections, sometimes it hard crashes. This is
due to an uninitialized list member for the io_uring request. Normally
this doesn't trigger and none of the test cases caught it.

Reported-by: Daniel Kozak <kozzi11@gmail.com>
Tested-by: Daniel Kozak <kozzi11@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

Merge tag 'pm-5.3-rc2' of git://git./linux/kernel/git/rafael/linux-pm

Pull power management fixes from Rafael Wysocki
"These fix two issues related to the RAPL MMIO interface support added
  recently and one cpufreq driver issue.

  Specifics:

   - Initialize the power capping subsystem and the RAPL driver earlier
     in case the int340X thermal driver is built-in and attempts to
     register an MMIO interface for RAPL which must not happen before
     the requisite infrastructure is ready (Zhang Rui)

   - Fix the int340X thermal driver's RAPL MMIO interface registration
     error path (Rafael Wysocki)

   - Fix possible use-after-free in the pasemi cpufreq driver (Wen
     Yang)"

* tag 'pm-5.3-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  cpufreq/pasemi: fix use-after-free in pas_cpufreq_cpu_init()
  int340X/processor_thermal_device: Fix proc_thermal_rapl_remove()
  powercap: Invoke powercap_init() and rapl_init() earlier

Merge tag 'riscv/for-v5.3-rc2' of git://git./linux/kernel/git/riscv/linux

Pull RISC-V updates from Paul Walmsley:
"Four minor RISC-V-related changes:

   - Add support for the new clone3 syscall for RV64, relying on the
     generic support

   - Add DT data for the gigabit Ethernet controller on the SiFive FU540
     and the HiFive Unleashed board

   - Update MAINTAINERS to add me to the arch/riscv maintainers' list

   - Add support for PCIe message-signaled interrupts by reusing the
     generic header file"

* tag 'riscv/for-v5.3-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux:
  riscv: dts: Add DT node for SiFive FU540 Ethernet controller driver
  riscv: include generic support for MSI irqdomains
  MAINTAINERS: Add Paul as a RISC-V maintainer
  riscv: enable sys_clone3 syscall for rv64

Merge tag 'ktest-v5.3' of git://git./linux/kernel/git/rostedt/linux-ktest

Pull ktest fixlets from Steven Rostedt:
"This contains only simple spelling fixes"

* tag 'ktest-v5.3' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-ktest:
ktest: Fix some typos in config-bisect.pl

Merge branch 'access-creds'

The access() (and faccessat()) credentials change can cause an
unnecessary load on the RCU machinery because every access() call ends
up freeing the temporary access credential using RCU.

This isn't really noticeable on small machines, but if you have hundreds
of cores you can cause huge slowdowns due to RCU storms.

It's easy to avoid: the temporary access crededntials aren't actually
normally accessed using RCU at all, so we can avoid the whole issue by
just marking them as such.

* access-creds:
access: avoid the RCU grace period for the temporary subjective credentials

btrfs: Fix deadlock caused by missing memory barrier

Commit 06297d8cefca ("btrfs: switch extent_buffer blocking_writers from
atomic to int") changed the type of blocking_writers but forgot to
adjust relevant code in btrfs_tree_unlock by converting the
smp_mb__after_atomic to smp_mb. This opened up the possibility of a
deadlock due to re-ordering of setting blocking_writers and
checking/waking up the waiter. This particular lockup is explained in a
comment above waitqueue_active() function.

Fix it by converting the memory barrier to a full smp_mb, accounting
for the fact that blocking_writers is a simple integer.

Fixes: 06297d8cefca ("btrfs: switch extent_buffer blocking_writers from atomic to int")
Tested-by: Johannes Thumshirn <jthumshirn@suse.com>
Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

IB/mlx5: Fix RSS Toeplitz setup to be aligned with the HW specification

The specification for the Toeplitz function doesn't require to set the key
explicitly to be symmetric. In case a symmetric functionality is required
a symmetric key can be simply used.

Wrongly forcing the algorithm to symmetric causes the wrong packet
distribution and a performance degradation.

Link: https://lore.kernel.org/r/20190723065733.4899-7-leon@kernel.org
Cc: <stable@vger.kernel.org> # 4.7
Fixes: 28d6137008b2 ("IB/mlx5: Add RSS QP support")
Signed-off-by: Yishai Hadas <yishaih@mellanox.com>
Reviewed-by: Alex Vainman <alexv@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>

IB/counters: Always initialize the port counter object

Port counter objects should be initialized even if alloc_stats is
unsupported, otherwise QP bind operations in user space can trigger a NULL
pointer deference if they try to bind QP on RDMA device which doesn't
support counters.

Fixes: f34a55e497e8 ("RDMA/core: Get sum value of all counters when perform a sysfs stat read")
Link: https://lore.kernel.org/r/20190723065733.4899-11-leon@kernel.org
Signed-off-by: Parav Pandit <parav@mellanox.com>
Reviewed-by: Mark Zhang <markz@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>

IB/core: Fix querying total rdma stats

rdma_counter_init() may fail for a device. In such case while calculating
total sum, ignore NULL hstats.

This fixes below observed call trace.

BUG: kernel NULL pointer dereference, address: 00000000000000a0
PGD 8000001009b30067 P4D 8000001009b30067 PUD 10549c9067 PMD 0
Oops: 0000 [#1] SMP PTI
CPU: 55 PID: 20887 Comm: cat Kdump: loaded Not tainted 5.2.0-rc6-jdc+ #13
RIP: 0010:rdma_counter_get_hwstat_value+0xf2/0x150 [ib_core]
Call Trace:
show_hw_stats+0x5e/0x130 [ib_core]
dev_attr_show+0x15/0x50
sysfs_kf_seq_show+0xc6/0x1a0
seq_read+0x132/0x370
vfs_read+0x89/0x140
ksys_read+0x5c/0xd0
do_syscall_64+0x5a/0x240
entry_SYSCALL_64_after_hwframe+0x49/0xbe

Fixes: f34a55e497e8 ("RDMA/core: Get sum value of all counters when perform a sysfs stat read")
Link: https://lore.kernel.org/r/20190723065733.4899-10-leon@kernel.org
Signed-off-by: Parav Pandit <parav@mellanox.com>
Reviewed-by: Mark Zhang <markz@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>

IB/mlx5: Prevent concurrent MR updates during invalidation

The device requires that memory registration work requests that update the
address translation table of a MR will be fenced if posted together. This
scenario can happen when address ranges are invalidated by the mmu in
separate concurrent calls to the invalidation callback.

We prefer to block concurrent address updates for a single MR over fencing
since making the decision if a WQE needs fencing will be more expensive
and fencing all WQEs is a too radical choice.

Further, it isn't clear that this code can even run safely concurrently,
so a lock is a safer choice.

Fixes: b4cfe447d47b ("IB/mlx5: Implement on demand paging by adding support for MMU notifiers")
Link: https://lore.kernel.org/r/20190723065733.4899-8-leon@kernel.org
Signed-off-by: Moni Shoua <monis@mellanox.com>
Reviewed-by: Artemy Kovalyov <artemyko@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Reviewed-by: Jason Gunthorpe <jgg@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>