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Author SHA1 Message Date
Lukas Bulwahn eb38f37c3c kbuild: doc: describe proper script invocation 
During an investigation to fix up the execute bits of scripts in the
kernel repository, Andrew Morton and Kees Cook pointed out that the
execute bit should not matter, and that build scripts cannot rely on that.
Kees could not point to any documentation, though.

Masahiro Yamada explained the convention of setting execute bits to make
it easier for manual script invocation.

Provide some basic documentation how the build shall invoke scripts, such
that the execute bits do not matter, and acknowledge that execute bits are
useful nonetheless.

This serves as reference for further clean-up patches in the future.

Suggested-by: Andrew Morton <akpm@linux-foundation.org>
Suggested-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Lukas Bulwahn <lukas.bulwahn@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Masahiro Yamada <masahiroy@kernel.org>
Cc: Michal Marek <michal.lkml@markovi.net>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Ujjwal Kumar <ujjwalkumar0501@gmail.com>
Cc: Lukas Bulwahn <lukas.bulwahn@gmail.com>
Link: https://lore.kernel.org/lkml/20200830174409.c24c3f67addcce0cea9a9d4c@linux-foundation.org/
Link: https://lore.kernel.org/lkml/202008271102.FEB906C88@keescook/
Link: https://lore.kernel.org/linux-kbuild/CAK7LNAQdrvMkDA6ApDJCGr+5db8SiPo=G+p8EiOvnnGvEN80gA@mail.gmail.com/
Link: https://lkml.kernel.org/r/20201001075723.24246-1-lukas.bulwahn@gmail.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 2020-10-13 18:38:26 -07:00
Nick Desaulniers 4d6fb34acb export.h: fix section name for CONFIG_TRIM_UNUSED_KSYMS for Clang 
When enabling CONFIG_TRIM_UNUSED_KSYMS, the linker will warn about the
orphan sections:

(".discard.ksym") is being placed in '".discard.ksym"'

repeatedly when linking vmlinux.  This is because the stringification
operator, `#`, in the preprocessor escapes strings.  GCC and Clang differ
in how they treat section names that contain \".

The portable solution is to not use a string literal with the preprocessor
stringification operator.

Fixes: commit bbda5ec671 ("kbuild: simplify dependency generation for CONFIG_TRIM_UNUSED_KSYMS")
Reported-by: kbuild test robot <lkp@intel.com>
Suggested-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Kees Cook <keescook@chromium.org>
Cc: Nathan Chancellor <natechancellor@gmail.com>
Cc: Masahiro Yamada <yamada.masahiro@socionext.com>
Cc: Matthias Maennich <maennich@google.com>
Cc: Jessica Yu <jeyu@kernel.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Will Deacon <will@kernel.org>
Link: https://bugs.llvm.org/show_bug.cgi?id=42950
Link: https://github.com/ClangBuiltLinux/linux/issues/1166
Link: https://lkml.kernel.org/r/20200929190701.398762-1-ndesaulniers@google.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 2020-10-13 18:38:26 -07:00
Nick Desaulniers a25c13b3aa compiler.h: avoid escaped section names 
The stringification operator, `#`, in the preprocessor escapes strings.
For example, `# "foo"` becomes `"\"foo\""`.  GCC and Clang differ in how
they treat section names that contain \".

The portable solution is to not use a string literal with the preprocessor
stringification operator.

In this case, since __section unconditionally uses the stringification
operator, we actually want the more verbose
__attribute__((__section__())).

Fixes: commit e04462fb82 ("Compiler Attributes: remove uses of __attribute__ from compiler.h")
Signed-off-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Miguel Ojeda <miguel.ojeda.sandonis@gmail.com>
Cc: Luc Van Oostenryck <luc.vanoostenryck@gmail.com>
Cc: Nathan Chancellor <natechancellor@gmail.com>
Cc: Arvind Sankar <nivedita@alum.mit.edu>
Link: https://bugs.llvm.org/show_bug.cgi?id=42950
Link: https://lkml.kernel.org/r/20200929194318.548707-1-ndesaulniers@google.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 2020-10-13 18:38:26 -07:00
Nick Desaulniers c8db3b0a7b compiler-gcc: improve version error 
As Kees suggests, doing so provides developers with two useful pieces of
information:
- The kernel build was attempting to use GCC.
  (Maybe they accidentally poked the wrong configs in a CI.)
- They need 4.9 or better.
  ("Upgrade to what version?" doesn't need to be dug out of documentation,
   headers, etc.)

Suggested-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Tested-by: Sedat Dilek <sedat.dilek@gmail.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Miguel Ojeda <miguel.ojeda.sandonis@gmail.com>
Reviewed-by: Nathan Chancellor <natechancellor@gmail.com>
Reviewed-by: Sedat Dilek <sedat.dilek@gmail.com>
Cc: Andrey Konovalov <andreyknvl@google.com>
Cc: Fangrui Song <maskray@google.com>
Cc: Marco Elver <elver@google.com>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Masahiro Yamada <masahiroy@kernel.org>
Cc: Vincenzo Frascino <vincenzo.frascino@arm.com>
Cc: Will Deacon <will@kernel.org>
Link: https://lkml.kernel.org/r/20200902225911.209899-8-ndesaulniers@google.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 2020-10-13 18:38:26 -07:00
Marco Elver 527f6750d9 kasan: remove mentions of unsupported Clang versions 
Since the kernel now requires at least Clang 10.0.1, remove any mention of
old Clang versions and simplify the documentation.

Signed-off-by: Marco Elver <elver@google.com>
Signed-off-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Andrey Konovalov <andreyknvl@google.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Nathan Chancellor <natechancellor@gmail.com>
Cc: Fangrui Song <maskray@google.com>
Cc: Miguel Ojeda <miguel.ojeda.sandonis@gmail.com>
Cc: Sedat Dilek <sedat.dilek@gmail.com>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Masahiro Yamada <masahiroy@kernel.org>
Cc: Vincenzo Frascino <vincenzo.frascino@arm.com>
Cc: Will Deacon <will@kernel.org>
Link: https://lkml.kernel.org/r/20200902225911.209899-7-ndesaulniers@google.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 2020-10-13 18:38:26 -07:00
Nick Desaulniers 3511af0a72 Partially revert "ARM: 8905/1: Emit __gnu_mcount_nc when using Clang 10.0.0 or newer" 
This partially reverts commit b0fe66cf09.

The minimum supported version of clang is now clang 10.0.1. We still
want to pass -meabi=gnu.

Suggested-by: Nathan Chancellor <natechancellor@gmail.com>
Signed-off-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Nathan Chancellor <natechancellor@gmail.com>
Cc: Andrey Konovalov <andreyknvl@google.com>
Cc: Fangrui Song <maskray@google.com>
Cc: Marco Elver <elver@google.com>
Cc: Miguel Ojeda <miguel.ojeda.sandonis@gmail.com>
Cc: Sedat Dilek <sedat.dilek@gmail.com>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Masahiro Yamada <masahiroy@kernel.org>
Cc: Vincenzo Frascino <vincenzo.frascino@arm.com>
Cc: Will Deacon <will@kernel.org>
Link: https://lkml.kernel.org/r/20200902225911.209899-6-ndesaulniers@google.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 2020-10-13 18:38:26 -07:00
Nick Desaulniers 3759da22e5 Revert "arm64: vdso: Fix compilation with clang older than 8" 
This reverts commit 3acf4be235.

The minimum supported version of clang is clang 10.0.1.

Suggested-by: Nathan Chancellor <natechancellor@gmail.com>
Signed-off-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Nathan Chancellor <natechancellor@gmail.com>
Cc: Andrey Konovalov <andreyknvl@google.com>
Cc: Fangrui Song <maskray@google.com>
Cc: Marco Elver <elver@google.com>
Cc: Miguel Ojeda <miguel.ojeda.sandonis@gmail.com>
Cc: Sedat Dilek <sedat.dilek@gmail.com>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Masahiro Yamada <masahiroy@kernel.org>
Cc: Vincenzo Frascino <vincenzo.frascino@arm.com>
Cc: Will Deacon <will@kernel.org>
Link: https://lkml.kernel.org/r/20200902225911.209899-5-ndesaulniers@google.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 2020-10-13 18:38:26 -07:00
Nick Desaulniers 2980e6070e Revert "arm64: bti: Require clang >= 10.0.1 for in-kernel BTI support" 
This reverts commit b9249cba25.

The minimum supported version of clang is now 10.0.1.

Suggested-by: Nathan Chancellor <natechancellor@gmail.com>
Signed-off-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Nathan Chancellor <natechancellor@gmail.com>
Cc: Andrey Konovalov <andreyknvl@google.com>
Cc: Fangrui Song <maskray@google.com>
Cc: Marco Elver <elver@google.com>
Cc: Miguel Ojeda <miguel.ojeda.sandonis@gmail.com>
Cc: Sedat Dilek <sedat.dilek@gmail.com>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Masahiro Yamada <masahiroy@kernel.org>
Cc: Vincenzo Frascino <vincenzo.frascino@arm.com>
Cc: Will Deacon <will@kernel.org>
Link: https://lkml.kernel.org/r/20200902225911.209899-4-ndesaulniers@google.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 2020-10-13 18:38:26 -07:00
Nick Desaulniers 4c207c50ea Revert "kbuild: disable clang's default use of -fmerge-all-constants" 
This reverts commit 87e0d4f0f3.

-fno-merge-all-constants has been the default since clang-6; the minimum
supported version of clang in the kernel is clang-10 (10.0.1).

Suggested-by: Nathan Chancellor <natechancellor@gmail.com>
Signed-off-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Tested-by: Sedat Dilek <sedat.dilek@gmail.com>
Reviewed-by: Fangrui Song <maskray@google.com>
Reviewed-by: Nathan Chancellor <natechancellor@gmail.com>
Reviewed-by: Sedat Dilek <sedat.dilek@gmail.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Cc: Andrey Konovalov <andreyknvl@google.com>
Cc: Marco Elver <elver@google.com>
Cc: Miguel Ojeda <miguel.ojeda.sandonis@gmail.com>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Masahiro Yamada <masahiroy@kernel.org>
Cc: Vincenzo Frascino <vincenzo.frascino@arm.com>
Cc: Will Deacon <will@kernel.org>
Link: https://lkml.kernel.org/r/20200902225911.209899-3-ndesaulniers@google.com
Link: https://reviews.llvm.org/rL329300.
Link: https://github.com/ClangBuiltLinux/linux/issues/9
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 2020-10-13 18:38:26 -07:00
Nick Desaulniers 1f7a44f63e compiler-clang: add build check for clang 10.0.1 
Patch series "set clang minimum version to 10.0.1", v3.

Adds a compile time #error to compiler-clang.h setting the effective
minimum supported version to clang 10.0.1.  A separate patch has already
been picked up into the Documentation/ tree also confirming the version.

Next are a series of reverts. One for 32b arm is a partial revert.

Then Marco suggested fixes to KASAN docs.

Finally, improve the warning for GCC too as per Kees.

This patch (of 7):

During Plumbers 2020, we voted to just support the latest release of Clang
for now.  Add a compile time check for this.

We plan to remove workarounds for older versions now, which will break in
subtle and not so subtle ways.

Suggested-by: Sedat Dilek <sedat.dilek@gmail.com>
Suggested-by: Nathan Chancellor <natechancellor@gmail.com>
Suggested-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Tested-by: Sedat Dilek <sedat.dilek@gmail.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Miguel Ojeda <miguel.ojeda.sandonis@gmail.com>
Reviewed-by: Sedat Dilek <sedat.dilek@gmail.com>
Acked-by: Marco Elver <elver@google.com>
Acked-by: Nathan Chancellor <natechancellor@gmail.com>
Acked-by: Sedat Dilek <sedat.dilek@gmail.com>
Cc: Andrey Konovalov <andreyknvl@google.com>
Cc: Fangrui Song <maskray@google.com>
Cc: Masahiro Yamada <masahiroy@kernel.org>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Will Deacon <will@kernel.org>
Cc: Vincenzo Frascino <vincenzo.frascino@arm.com>
Link: https://lkml.kernel.org/r/20200902225911.209899-1-ndesaulniers@google.com
Link: https://lkml.kernel.org/r/20200902225911.209899-2-ndesaulniers@google.com
Link: https://github.com/ClangBuiltLinux/linux/issues/9
Link: https://github.com/ClangBuiltLinux/linux/issues/941
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 2020-10-13 18:38:26 -07:00
Linus Torvalds 029f56db6a Merge tag 'x86_asm_for_v5.10' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 
Pull x86 asm updates from Borislav Petkov:
 "Two asm wrapper fixes:

   - Use XORL instead of XORQ to avoid a REX prefix and save some bytes
     in the .fixup section, by Uros Bizjak.

   - Replace __force_order dummy variable with a memory clobber to fix
     LLVM requiring a definition for former and to prevent memory
     accesses from still being cached/reordered, by Arvind Sankar"

* tag 'x86_asm_for_v5.10' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/asm: Replace __force_order with a memory clobber
  x86/uaccess: Use XORL %0,%0 in __get_user_asm()
 2020-10-13 13:36:07 -07:00
Linus Torvalds 7cd4ecd917 Merge tag 'drivers-5.10-2020-10-12' of git://git.kernel.dk/linux-block 
Pull block driver updates from Jens Axboe:
 "Here are the driver updates for 5.10.

  A few SCSI updates in here too, in coordination with Martin as they
  depend on core block changes for the shared tag bitmap.

  This contains:

   - NVMe pull requests via Christoph:
      - fix keep alive timer modification (Amit Engel)
      - order the PCI ID list more sensibly (Andy Shevchenko)
      - cleanup the open by controller helper (Chaitanya Kulkarni)
      - use an xarray for the CSE log lookup (Chaitanya Kulkarni)
      - support ZNS in nvmet passthrough mode (Chaitanya Kulkarni)
      - fix nvme_ns_report_zones (Christoph Hellwig)
      - add a sanity check to nvmet-fc (James Smart)
      - fix interrupt allocation when too many polled queues are
        specified (Jeffle Xu)
      - small nvmet-tcp optimization (Mark Wunderlich)
      - fix a controller refcount leak on init failure (Chaitanya
        Kulkarni)
      - misc cleanups (Chaitanya Kulkarni)
      - major refactoring of the scanning code (Christoph Hellwig)

   - MD updates via Song:
      - Bug fixes in bitmap code, from Zhao Heming
      - Fix a work queue check, from Guoqing Jiang
      - Fix raid5 oops with reshape, from Song Liu
      - Clean up unused code, from Jason Yan
      - Discard improvements, from Xiao Ni
      - raid5/6 page offset support, from Yufen Yu

   - Shared tag bitmap for SCSI/hisi_sas/null_blk (John, Kashyap,
     Hannes)

   - null_blk open/active zone limit support (Niklas)

   - Set of bcache updates (Coly, Dongsheng, Qinglang)"

* tag 'drivers-5.10-2020-10-12' of git://git.kernel.dk/linux-block: (78 commits)
  md/raid5: fix oops during stripe resizing
  md/bitmap: fix memory leak of temporary bitmap
  md: fix the checking of wrong work queue
  md/bitmap: md_bitmap_get_counter returns wrong blocks
  md/bitmap: md_bitmap_read_sb uses wrong bitmap blocks
  md/raid0: remove unused function is_io_in_chunk_boundary()
  nvme-core: remove extra condition for vwc
  nvme-core: remove extra variable
  nvme: remove nvme_identify_ns_list
  nvme: refactor nvme_validate_ns
  nvme: move nvme_validate_ns
  nvme: query namespace identifiers before adding the namespace
  nvme: revalidate zone bitmaps in nvme_update_ns_info
  nvme: remove nvme_update_formats
  nvme: update the known admin effects
  nvme: set the queue limits in nvme_update_ns_info
  nvme: remove the 0 lba_shift check in nvme_update_ns_info
  nvme: clean up the check for too large logic block sizes
  nvme: freeze the queue over ->lba_shift updates
  nvme: factor out a nvme_configure_metadata helper
  ...
 2020-10-13 13:04:41 -07:00
Linus Torvalds 79ec6d9cac Merge tag 'libata-5.10-2020-10-12' of git://git.kernel.dk/linux-block 
Pull libata updates from Jens Axboe:
 "Nothing major in here, just fixes or improvements collected over the
  last few months"

* tag 'libata-5.10-2020-10-12' of git://git.kernel.dk/linux-block:
  ata: ahci: mvebu: Make SATA PHY optional for Armada 3720
  MAINTAINERS: remove LIBATA PATA DRIVERS entry
  pata_cmd64x: Use fallthrough pseudo-keyword
  ahci: qoriq: enable acpi support in qoriq ahci driver
  sata, highbank: simplify the return expression of ahci_highbank_suspend
  ahci: Add Intel Rocket Lake PCH-H RAID PCI IDs
 2020-10-13 12:50:48 -07:00
Linus Torvalds 6ad4bf6ea1 Merge tag 'io_uring-5.10-2020-10-12' of git://git.kernel.dk/linux-block 
Pull io_uring updates from Jens Axboe:

 - Add blkcg accounting for io-wq offload (Dennis)

 - A use-after-free fix for io-wq (Hillf)

 - Cancelation fixes and improvements

 - Use proper files_struct references for offload

 - Cleanup of io_uring_get_socket() since that can now go into our own
   header

 - SQPOLL fixes and cleanups, and support for sharing the thread

 - Improvement to how page accounting is done for registered buffers and
   huge pages, accounting the real pinned state

 - Series cleaning up the xarray code (Willy)

 - Various cleanups, refactoring, and improvements (Pavel)

 - Use raw spinlock for io-wq (Sebastian)

 - Add support for ring restrictions (Stefano)

* tag 'io_uring-5.10-2020-10-12' of git://git.kernel.dk/linux-block: (62 commits)
  io_uring: keep a pointer ref_node in file_data
  io_uring: refactor *files_register()'s error paths
  io_uring: clean file_data access in files_register
  io_uring: don't delay io_init_req() error check
  io_uring: clean leftovers after splitting issue
  io_uring: remove timeout.list after hrtimer cancel
  io_uring: use a separate struct for timeout_remove
  io_uring: improve submit_state.ios_left accounting
  io_uring: simplify io_file_get()
  io_uring: kill extra check in fixed io_file_get()
  io_uring: clean up ->files grabbing
  io_uring: don't io_prep_async_work() linked reqs
  io_uring: Convert advanced XArray uses to the normal API
  io_uring: Fix XArray usage in io_uring_add_task_file
  io_uring: Fix use of XArray in __io_uring_files_cancel
  io_uring: fix break condition for __io_uring_register() waiting
  io_uring: no need to call xa_destroy() on empty xarray
  io_uring: batch account ->req_issue and task struct references
  io_uring: kill callback_head argument for io_req_task_work_add()
  io_uring: move req preps out of io_issue_sqe()
  ...
 2020-10-13 12:36:21 -07:00
Linus Torvalds 3ad11d7ac8 Merge tag 'block-5.10-2020-10-12' of git://git.kernel.dk/linux-block 
Pull block updates from Jens Axboe:

 - Series of merge handling cleanups (Baolin, Christoph)

 - Series of blk-throttle fixes and cleanups (Baolin)

 - Series cleaning up BDI, seperating the block device from the
   backing_dev_info (Christoph)

 - Removal of bdget() as a generic API (Christoph)

 - Removal of blkdev_get() as a generic API (Christoph)

 - Cleanup of is-partition checks (Christoph)

 - Series reworking disk revalidation (Christoph)

 - Series cleaning up bio flags (Christoph)

 - bio crypt fixes (Eric)

 - IO stats inflight tweak (Gabriel)

 - blk-mq tags fixes (Hannes)

 - Buffer invalidation fixes (Jan)

 - Allow soft limits for zone append (Johannes)

 - Shared tag set improvements (John, Kashyap)

 - Allow IOPRIO_CLASS_RT for CAP_SYS_NICE (Khazhismel)

 - DM no-wait support (Mike, Konstantin)

 - Request allocation improvements (Ming)

 - Allow md/dm/bcache to use IO stat helpers (Song)

 - Series improving blk-iocost (Tejun)

 - Various cleanups (Geert, Damien, Danny, Julia, Tetsuo, Tian, Wang,
   Xianting, Yang, Yufen, yangerkun)

* tag 'block-5.10-2020-10-12' of git://git.kernel.dk/linux-block: (191 commits)
  block: fix uapi blkzoned.h comments
  blk-mq: move cancel of hctx->run_work to the front of blk_exit_queue
  blk-mq: get rid of the dead flush handle code path
  block: get rid of unnecessary local variable
  block: fix comment and add lockdep assert
  blk-mq: use helper function to test hw stopped
  block: use helper function to test queue register
  block: remove redundant mq check
  block: invoke blk_mq_exit_sched no matter whether have .exit_sched
  percpu_ref: don't refer to ref->data if it isn't allocated
  block: ratelimit handle_bad_sector() message
  blk-throttle: Re-use the throtl_set_slice_end()
  blk-throttle: Open code __throtl_de/enqueue_tg()
  blk-throttle: Move service tree validation out of the throtl_rb_first()
  blk-throttle: Move the list operation after list validation
  blk-throttle: Fix IO hang for a corner case
  blk-throttle: Avoid tracking latency if low limit is invalid
  blk-throttle: Avoid getting the current time if tg->last_finish_time is 0
  blk-throttle: Remove a meaningless parameter for throtl_downgrade_state()
  block: Remove redundant 'return' statement
  ...
 2020-10-13 12:12:44 -07:00
Linus Torvalds 857d64485e Merge tag 'x86_urgent_for_v5.10-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 
Pull x86 fixes from Borislav Petkov:

 - Fix the #DE oops message string format which confused tools parsing
   crash information (Thomas Gleixner)

 - Remove an unused variable in the UV5 code which was triggering a
   build warning with clang (Mike Travis)

* tag 'x86_urgent_for_v5.10-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/platform/uv: Remove unused variable in UV5 NMI handler
  x86/traps: Fix #DE Oops message regression
 2020-10-13 12:02:57 -07:00
Mike Travis 081dd68c89 x86/platform/uv: Remove unused variable in UV5 NMI handler 
Remove an unused variable.

Signed-off-by: Mike Travis <mike.travis@hpe.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Link: https://lkml.kernel.org/r/20201013154731.132565-1-mike.travis@hpe.com
 2020-10-13 19:21:13 +02:00
Thomas Gleixner 5f1ec1fd32 x86/traps: Fix #DE Oops message regression 
The conversion of #DE to the idtentry mechanism introduced a change in the
Ooops message which confuses tools which parse crash information in dmesg.

Remove the underscore from 'divide_error' to restore previous behaviour.

Fixes: 9d06c4027f ("x86/entry: Convert Divide Error to IDTENTRY")
Reported-by: Dmitry Vyukov <dvyukov@google.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/CACT4Y+bTZFkuZd7+bPArowOv-7Die+WZpfOWnEO_Wgs3U59+oA@mail.gmail.com
 2020-10-13 19:17:33 +02:00
Linus Torvalds c4439713e8 Merge tag 'hwmon-for-v5.10' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging 
Pull hwmon updates from Guenter Roeck:
 "New driver and chip support:
   - Moortec MR75203 PVT controller
   - MPS Multi-phase mp2975 controller
   - ADM1266
   - Zen3 CPUs
   - Intel MAX 10 BMC

  Enhancements:
   - Support for rated attributes in hwmon core
   - MAX20730:
      - Device monitoring via debugfs
      - VOUT readin adjustment vie devicetree bindings
   - LM75:
      - Devicetree support
      - Regulator support
   - Improved accumulationm logic in amd_energy driver
   - Added fan sensor to gsc-hwmon driver
   - Support for simplified I2C probing

  Various other minor fixes and improvements"

* tag 'hwmon-for-v5.10' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging: (64 commits)
  hwmon: (pmbus/max20730) adjust the vout reading given voltage divider
  dt-bindings: hwmon: max20730: adding device tree doc for max20730
  hwmon: Add hardware monitoring driver for Moortec MR75203 PVT controller
  hwmon: Add DT bindings schema for PVT controller
  dt-bindings: hwmon: Add the +vs supply to the lm75 bindings
  dt-bindings: hwmon: Convert lm75 bindings to yaml
  docs: hwmon: (ltc2945) update datasheet link
  hwmon: (mlxreg-fan) Fix double "Mellanox"
  hwmon: (pmbus/max20730) add device monitoring via debugfs
  hwmon: (pmbus/max34440) Fix OC fault limits
  hwmon: (bt1-pvt) Wait for the completion with timeout
  hwmon: (bt1-pvt) Cache current update timeout
  hwmon: (bt1-pvt) Test sensor power supply on probe
  hwmon: (lm75) Add regulator support
  hwmon: Add hwmon driver for Intel MAX 10 BMC
  dt-bindings: Add MP2975 voltage regulator device
  hwmon: (pmbus) Add support for MPS Multi-phase mp2975 controller
  hwmon: (tmp513) fix spelling typo in comments
  hwmon: (amd_energy) Update driver documentation
  hwmon: (amd_energy) Improve the accumulation logic
  ...
 2020-10-13 10:15:31 -07:00
Linus Torvalds 0486beaf88 Merge tag 'gpio-v5.10-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio 
Pull GPIO updates from Linus Walleij:
 "This time very little driver changes but lots of core changes.

  We have some interesting cooperative work for ARM and Intel alike,
  making the GPIO subsystem more and more suitable for industrial
  systems and the like, in addition to the in-kernel users.

  We touch driver core (device properties) and lib/* by adding one
  simple string array free function, these are authored by Andy
  Shevchenko who is a well known and recognized core helpers maintainers
  so this should be fine.

  We also see some Android GKI-related modularization in the MXC
  drivers.

  Core changes:

   - The big core change is the updated (v2) userspace character device
     API.

     This corrects badly designed 64-bit alignment around the line
     events. We also add the debounce request feature. This echoes the
     often quotes passage from Frederick Brooks "The mythical man-month"
     to always throw one away, which we have seen before in things such
     as V4L2. So we put in a new one and deprecate and obsolete the old
     one.

   - All example tools in tools/gpio/* are migrated to the new API to
     set a good example. The libgpiod userspace library has been
     augmented to use this new API pretty much from day 1.

   - Some misc API hardening by using strn* function calls has been
     added as well.

   - Use the simpler IDA interface for GPIO chip instance enumeration.

   - Add device core function for counting string arrays in device
     properties.

   - Provide a generic library function kfree_strarray() that can be
     used throughout the kernel.

  Driver enhancements:

   - The DesignWare dwapb-gpio driver has been enhanced and now uses the
     IRQ handling in the gpiolib core.

   - The mockup and aggregator drivers have seen some substantial code
     clean-up and now use more of the core kernel inftrastructure.

   - Misc cleanups using dev_err_probe().

   - The MXC drivers (Freescale/NXP) can now be built modularized, which
     makes modularized GKI Android kernels happy"

* tag 'gpio-v5.10-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio: (73 commits)
  gpiolib: Update header block in gpiolib-cdev.h
  gpiolib: cdev: switch from kstrdup() to kstrndup()
  docs: gpio: add a new document to its index.rst
  gpio: pca953x: Add support for the NXP PCAL9554B/C
  tools: gpio: add debounce support to gpio-event-mon
  tools: gpio: add multi-line monitoring to gpio-event-mon
  tools: gpio: port gpio-event-mon to v2 uAPI
  tools: gpio: port gpio-hammer to v2 uAPI
  tools: gpio: rename nlines to num_lines
  tools: gpio: port gpio-watch to v2 uAPI
  tools: gpio: port lsgpio to v2 uAPI
  gpio: uapi: document uAPI v1 as deprecated
  gpiolib: cdev: support setting debounce
  gpiolib: cdev: support GPIO_V2_LINE_SET_VALUES_IOCTL
  gpiolib: cdev: support GPIO_V2_LINE_SET_CONFIG_IOCTL
  gpiolib: cdev: support edge detection for uAPI v2
  gpiolib: cdev: support GPIO_V2_GET_LINEINFO_IOCTL and GPIO_V2_GET_LINEINFO_WATCH_IOCTL
  gpiolib: cdev: support GPIO_V2_GET_LINE_IOCTL and GPIO_V2_LINE_GET_VALUES_IOCTL
  gpiolib: add build option for CDEV v1 ABI
  gpiolib: make cdev a build option
  ...
 2020-10-13 10:09:33 -07:00
Linus Torvalds a996b9c617 Merge tag 'spi-v5.10' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi 
Pull spi updates from Mark Brown:
 "There's quite a lot of changes for SPI in this release but none in the
  core, they're all mostly small driver updates and additions. Some of
  the more notable changes include:

   - A huge set of cleanups, optimizations and improvements for the
     DesignWare driver from Serge Semin finishing up the work started
     last release.

   - Conversion of the Zynq gqspi driver to spi-mem.

   - Support for Baikal T1, Broadcom BCMSTB 7445, and Renesas R8A7742"

* tag 'spi-v5.10' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi: (137 commits)
  spi: cadence: Add SPI transfer delays
  spi: dw: Add Baikal-T1 SPI Controller bindings
  spi: dw: Add Baikal-T1 SPI Controller glue driver
  spi: dw: Add poll-based SPI transfers support
  spi: dw: Introduce max mem-ops SPI bus frequency setting
  spi: dw: Add memory operations support
  spi: dw: Add generic DW SSI status-check method
  spi: dw: Move num-of retries parameter to the header file
  spi: dw: Explicitly de-assert CS on SPI transfer completion
  spi: dw: De-assert chip-select on reset
  spi: dw: Discard chip enabling on DMA setup error
  spi: dw: Unmask IRQs after enabling the chip
  spi: dw: Perform IRQ setup in a dedicated function
  spi: dw: Refactor IRQ-based SPI transfer procedure
  spi: dw: Refactor data IO procedure
  spi: dw: Add DW SPI controller config structure
  spi: dw: Update Rx sample delay in the config function
  spi: dw: Simplify the SPI bus speed config procedure
  spi: dw: Update SPI bus speed in a config function
  spi: dw: Detach SPI device specific CR0 config method
  ...
 2020-10-13 10:03:12 -07:00
Linus Torvalds 1724e02e02 Merge tag 'regulator-v5.10' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator 
Pull regulator updates from Mark Brown:
 "This is a fairly small release for the regulator API, there's quite a
  few new devices supported and some important improvements around
  coupled regulators in the core but mostly just small fixes and
  improvements otherwise.

  Summary:

   - Fixes and cleanups around the handling of coupled regulators.

   - A special driver for some Raspberry Pi panels with some unusually
     custom stuff around them.

   - Support for Qualcomm PM660/PM660L, PM8950 and PM8953, Richtek
     RT4801 and RTMV20, Rohm BD9576MUF and BD9573MUF"

* tag 'regulator-v5.10' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator: (89 commits)
  regulator: bd9576: Fix print
  regulator: bd9576: fix regulator binfdings dt node names
  dt-bindings: regulator: document pm8950 and pm8953 smd regulators
  regulator: qcom_smd: add pm8953 regulators
  regulator: Make constraint debug processing conditional on DEBUG
  regulator: qcom: labibb: Constify static structs
  regulator: dt-bindings: Document the PM660/PM660L PMICs entries
  regulator: qcom_smd: Add PM660/PM660L regulator support
  regulator: dt-bindings: Document the PM660/660L SPMI PMIC entries
  regulator: qcom_spmi: Add PM660/PM660L regulators
  regulator: qcom_spmi: Add support for new regulator types
  regulator: core: Enlarge max OF property name length to 64 chars
  regulator: tps65910: use regmap accessors
  regulator: rtmv20: Add missing regcache cache only before marked as dirty
  regulator: rtmv20: Update DT binding document and property name parsing
  regulator: rtmv20: Add DT-binding document for Richtek RTMV20
  regulator: rtmv20: Adds support for Richtek RTMV20 load switch regulator
  regulator: resolve supply after creating regulator
  regulator: print symbolic errors in kernel messages
  regulator: print state at boot
  ...
 2020-10-13 09:56:25 -07:00
Linus Torvalds 57218d7f2e Merge tag 'regmap-v5.10' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap 
Pull regmap updates from Mark Brown:
 "Quite a busy release for regmap, mostly support for new features
  useful on fairly small subsets of devices. The user visible features
  are:

   - A new API for registering large numbers of regmap fields at once.

   - Support for Intel AVMM buses connected via SPI.

   - Support for 12/20 address/value layouts.

   - Support for yet another scheme for acknowledging interrupts used on
     some Qualcomm devices"

* tag 'regmap-v5.10' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap:
  regmap: irq: Add support to clear ack registers
  regmap: add support to regmap_field_bulk_alloc/free apis
  regmap: destroy mutex (if used) in regmap_exit()
  regmap: debugfs: use semicolons rather than commas to separate statements
  regmap: debugfs: Fix more error path regressions
  regmap: Add support for 12/20 register formatting
  regmap: Add can_sleep configuration option
  regmap: soundwire: remove unused header mod_devicetable.h
  regmap: Use flexible sleep
  regmap: add Intel SPI Slave to AVMM Bus Bridge support
 2020-10-13 09:53:59 -07:00
Linus Torvalds fd5c32d808 Merge tag 'media/v5.10-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media 
Pull media updates from Mauro Carvalho Chehab:

 - the usbvision driver was dropped from staging

 - the Zoran driver were re-added at staging. It gained lots of
   improvements, and was converted to use videobuf2 API

 - a new virtual driver (vidtv) was added in order to allow testing the
   digital TV framework and APIs

 - the media uAPI documentation gained a glossary with commonly used
   terms, helping to simplify some parts of the docs

 - more cleanups at the atomisp driver

 - Mediatek VPU gained support for MT8183

 - added support for codecs with supports doing colorspace conversion
   (CSC)

 - support for CSC API was added at vivid and rksip1 drivers

 - added a helper core support and uAPI for better supporting H.264
   codecs

 - added support for Renesas R8A774E1

 - use the new SPDX GFDL-1.1-no-invariants-or-later license on media
   uAPI docs, instead of a license text

 - Venus driver has gained VP9 codec support

 - lots of other cleanups and driver improvements

* tag 'media/v5.10-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media: (555 commits)
  media: dvb-frontends/drxk_hard.c: fix uninitialized variable warning
  media: tvp7002: fix uninitialized variable warning
  media: s5k5baf: drop 'data' field in struct s5k5baf_fw
  media: dt-bindings: media: venus: Add an optional power domain for perf voting
  media: rcar-vin: rcar-dma: Fix setting VNIS_REG for RAW8 formats
  media: staging: rkisp1: uapi: Do not use BIT() macro
  media: v4l2-mem2mem: Fix spurious v4l2_m2m_buf_done
  media: usbtv: Fix refcounting mixup
  media: zoran.rst: place it at the right place this time
  media: add Zoran cardlist
  media: admin-guide: update cardlists
  media: siano: rename a duplicated card string
  media: zoran: move documentation file to the right place
  media: atomisp: fixes build breakage for ISP2400 due to a cleanup
  media: zoran: fix mixed case on vars
  media: zoran: get rid of an unused var
  media: zoran: use upper case for card types
  media: zoran: fix sparse warnings
  media: zoran: fix smatch warning
  media: zoran: update TODO
  ...
 2020-10-13 09:37:02 -07:00
Linus Torvalds 647412daeb Merge tag 'mmc-v5.10' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc 
Pull MMC updates from Ulf Hansson:
 "MMC core:
   - Export SDIO revision and info strings to userspace
   - Add support for specifying mmc/mmcblk index via mmc aliases in DT

 MMC host:
   - Enable support for async probe for all mmc host drivers
   - Enable compile testing of multiple host drivers
   - dw_mmc: Enable the Synopsys DesignWare driver for RISCV and CSKY
   - mtk-sd: Fixup support for CQHCI
   - owl-mmc: Add support for the actions,s700-mmc variant
   - renesas_sdhi: Fix regression (temporary) for re-insertion of SD cards
   - renesas_sdhi: Add support for the r8a774e1 variant
   - renesas_sdhi/tmio: Improvements for tunings
   - renesas_sdhi/tmio: Rework support for reset of controller
   - sdhci-acpi: Fix HS400 tuning for devices with invalid presets on AMDI0040
   - sdhci_am654: Improve support for tunings
   - sdhci_am654: Add support for input tap delays
   - sdhci_am654: Add workaround for card detect debounce timer
   - sdhci-am654: Add support for the TI's J7200 variants
   - sdhci-esdhc-imx: Fix support for manual tuning
   - sdhci-iproc: Enable support for eMMC DDR 3.3V for bcm2711
   - sdhci-msm: Fix stability issues with HS400 for sc7180
   - sdhci-of-sparx5: Add Sparx5 SoC eMMC driver
   - sdhci-of-esdhc: Fixup reference clock source selection
   - sdhci-pci: Add LTR support for some Intel BYT controllers
   - sdhci-pci-gli: Add CQHCI Support for GL9763E"

* tag 'mmc-v5.10' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc: (91 commits)
  mmc: sdhci_am654: Fix module autoload
  mmc: renesas_sdhi: workaround a regression when reinserting SD cards
  mmc: sdhci-pci-gli: Add CQHCI Support for GL9763E
  mmc: sdhci-acpi: AMDI0040: Set SDHCI_QUIRK2_PRESET_VALUE_BROKEN
  mmc: sdhci_am654: Enable tuning for SDR50
  mmc: sdhci_am654: Add support for software tuning
  mmc: sdhci_am654: Add support for input tap delay
  mmc: sdhci_am654: Fix hard coded otap delay array size
  dt-bindings: mmc: sdhci-am654: Add documentation for input tap delay
  dt-bindings: mmc: sdhci-am654: Convert sdhci-am654 controller documentation to json schema
  mmc: sdhci-of-esdhc: fix reference clock source selection
  mmc: host: fix depends for MMC_MESON_GX w/ COMPILE_TEST
  mmc: sdhci-s3c: hide forward declaration of of_device_id behind CONFIG_OF
  mmc: sdhci: fix indentation mistakes
  mmc: moxart: remove unneeded check for drvdata
  mmc: renesas_sdhi: drop local flag for tuning
  mmc: rtsx_usb_sdmmc: simplify the return expression of sd_change_phase()
  mmc: core: document mmc_hw_reset()
  mmc: mediatek: Drop pointer to mmc_host from msdc_host
  dt-bindings: mmc: owl: add compatible string actions,s700-mmc
  ...
 2020-10-13 09:25:24 -07:00
Linus Torvalds dfef313e99 Merge tag 'erofs-for-5.10-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs 
Pull erofs updates from Gao Xiang:
 "This cycle addresses a reported permission issue with overlay due to a
  duplicated permission check for "trusted." xattrs. Also, a REQ_RAHEAD
  flag is added now to all readahead requests in order to trace
  readahead I/Os. The others are random cleanups.

  All commits have been tested and have been in linux-next as well.

  Summary:

   - fix an issue which can cause overlay permission problem due to
     duplicated permission check for "trusted." xattrs;

   - add REQ_RAHEAD flag to readahead requests for blktrace;

   - several random cleanup"

* tag 'erofs-for-5.10-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs:
  erofs: remove unnecessary enum entries
  erofs: add REQ_RAHEAD flag to readahead requests
  erofs: fold in should_decompress_synchronously()
  erofs: avoid unnecessary variable `err'
  erofs: remove unneeded parameter
  erofs: avoid duplicated permission check for "trusted." xattrs
 2020-10-13 09:09:42 -07:00
Linus Torvalds 11e3235b43 Merge tag 'for-5.10-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux 
Pull btrfs updates from David Sterba:
 "Mostly core updates with a few user visible bits and fixes.

  Hilights:

   - fsync performance improvements
      - less contention of log mutex (throughput +4%, latency -14%,
        dbench with 32 clients)
      - skip unnecessary commits for link and rename (throughput +6%,
        latency -30%, rename latency -75%, dbench with 16 clients)
      - make fast fsync wait only for writeback (throughput +10..40%,
        runtime -1..-20%, dbench with 1 to 64 clients on various
        file/block sizes)

   - direct io is now implemented using the iomap infrastructure, that's
     the main part, we still have a workaround that requires an iomap
     API update, coming in 5.10

   - new sysfs exports:
      - information about the exclusive filesystem operation status
        (balance, device add/remove/replace, ...)
      - supported send stream version

  Core:

   - use ticket space reservations for data, fair policy using the same
     infrastructure as metadata

   - preparatory work to switch locking from our custom tree locks to
     standard rwsem, now the locking context is propagated to all
     callers, actual switch is expected to happen in the next dev cycle

   - seed device structures are now using list API

   - extent tracepoints print proper tree id

   - unified range checks for extent buffer helpers

   - send: avoid using temporary buffer for copying data

   - remove unnecessary RCU protection from space infos

   - remove unused readpage callback for metadata, enabling several
     cleanups

   - replace indirect function calls for end io hooks and remove
     extent_io_ops completely

  Fixes:

   - more lockdep warning fixes

   - fix qgroup reservation for delayed inode and an occasional
     reservation leak for preallocated files

   - fix device replace of a seed device

   - fix metadata reservation for fallocate that leads to transaction
     aborts

   - reschedule if necessary when logging directory items or when
     cloning lots of extents

   - tree-checker: fix false alert caused by legacy btrfs root item

   - send: fix rename/link conflicts for orphanized inodes

   - properly initialize device stats for seed devices

   - skip devices without magic signature when mounting

  Other:

   - error handling improvements, BUG_ONs replaced by proper handling,
     fuzz fixes

   - various function parameter cleanups

   - various W=1 cleanups

   - error/info messages improved

  Mishaps:

   - commit 62cf539120 ("btrfs: move btrfs_rm_dev_replace_free_srcdev
     outside of all locks") is a rebase leftover after the patch got
     merged to 5.9-rc8 as a466c85edc ("btrfs: move
     btrfs_rm_dev_replace_free_srcdev outside of all locks"), the
     remaining part is trivial and the patch is in the middle of the
     series so I'm keeping it there instead of rebasing"

* tag 'for-5.10-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux: (161 commits)
  btrfs: rename BTRFS_INODE_ORDERED_DATA_CLOSE flag
  btrfs: annotate device name rcu_string with __rcu
  btrfs: skip devices without magic signature when mounting
  btrfs: cleanup cow block on error
  btrfs: remove BTRFS_INODE_READDIO_NEED_LOCK
  fs: remove no longer used dio_end_io()
  btrfs: return error if we're unable to read device stats
  btrfs: init device stats for seed devices
  btrfs: remove struct extent_io_ops
  btrfs: call submit_bio_hook directly for metadata pages
  btrfs: stop calling submit_bio_hook for data inodes
  btrfs: don't opencode is_data_inode in end_bio_extent_readpage
  btrfs: call submit_bio_hook directly in submit_one_bio
  btrfs: remove extent_io_ops::readpage_end_io_hook
  btrfs: replace readpage_end_io_hook with direct calls
  btrfs: send, recompute reference path after orphanization of a directory
  btrfs: send, orphanize first all conflicting inodes when processing references
  btrfs: tree-checker: fix false alert caused by legacy btrfs root item
  btrfs: use unaligned helpers for stack and header set/get helpers
  btrfs: free-space-cache: use unaligned helpers to access data
  ...
 2020-10-13 09:01:36 -07:00
Linus Torvalds c024a81125 Merge tag 'dlm-5.10' of git://git.kernel.org/pub/scm/linux/kernel/git/teigland/linux-dlm 
Pull dlm updates from David Teigland:
 "This set continues the ongoing rework of the low level communication
  layer in the dlm.

  The focus here is on improvements to connection handling, and
  reworking the receiving of messages"

* tag 'dlm-5.10' of git://git.kernel.org/pub/scm/linux/kernel/git/teigland/linux-dlm:
  fs: dlm: fix race in nodeid2con
  fs: dlm: rework receive handling
  fs: dlm: disallow buffer size below default
  fs: dlm: handle range check as callback
  fs: dlm: fix mark per nodeid setting
  fs: dlm: remove lock dependency warning
  fs: dlm: use free_con to free connection
  fs: dlm: handle possible othercon writequeues
  fs: dlm: move free writequeue into con free
  fs: dlm: fix configfs memory leak
  fs: dlm: fix dlm_local_addr memory leak
  fs: dlm: make connection hash lockless
  fs: dlm: synchronize dlm before shutdown
 2020-10-13 08:59:39 -07:00
Linus Torvalds 6f5032a852 Merge tag 'fscrypt-for-linus' of git://git.kernel.org/pub/scm/fs/fscrypt/fscrypt 
Pull fscrypt updates from Eric Biggers:
 "This release, we rework the implementation of creating new encrypted
  files in order to fix some deadlocks and prepare for adding fscrypt
  support to CephFS, which Jeff Layton is working on.

  We also export a symbol in preparation for the above-mentioned CephFS
  support and also for ext4/f2fs encrypt+casefold support.

  Finally, there are a few other small cleanups.

  As usual, all these patches have been in linux-next with no reported
  issues, and I've tested them with xfstests"

* tag 'fscrypt-for-linus' of git://git.kernel.org/pub/scm/fs/fscrypt/fscrypt:
  fscrypt: export fscrypt_d_revalidate()
  fscrypt: rename DCACHE_ENCRYPTED_NAME to DCACHE_NOKEY_NAME
  fscrypt: don't call no-key names "ciphertext names"
  fscrypt: use sha256() instead of open coding
  fscrypt: make fscrypt_set_test_dummy_encryption() take a 'const char *'
  fscrypt: handle test_dummy_encryption in more logical way
  fscrypt: move fscrypt_prepare_symlink() out-of-line
  fscrypt: make "#define fscrypt_policy" user-only
  fscrypt: stop pretending that key setup is nofs-safe
  fscrypt: require that fscrypt_encrypt_symlink() already has key
  fscrypt: remove fscrypt_inherit_context()
  fscrypt: adjust logging for in-creation inodes
  ubifs: use fscrypt_prepare_new_inode() and fscrypt_set_context()
  f2fs: use fscrypt_prepare_new_inode() and fscrypt_set_context()
  ext4: use fscrypt_prepare_new_inode() and fscrypt_set_context()
  ext4: factor out ext4_xattr_credits_for_new_inode()
  fscrypt: add fscrypt_prepare_new_inode() and fscrypt_set_context()
  fscrypt: restrict IV_INO_LBLK_32 to ino_bits <= 32
  fscrypt: drop unused inode argument from fscrypt_fname_alloc_buffer
 2020-10-13 08:54:00 -07:00
Linus Torvalds 39a5101f98 Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 
Pull crypto updates from Herbert Xu:
 "API:
   - Allow DRBG testing through user-space af_alg
   - Add tcrypt speed testing support for keyed hashes
   - Add type-safe init/exit hooks for ahash

  Algorithms:
   - Mark arc4 as obsolete and pending for future removal
   - Mark anubis, khazad, sead and tea as obsolete
   - Improve boot-time xor benchmark
   - Add OSCCA SM2 asymmetric cipher algorithm and use it for integrity

  Drivers:
   - Fixes and enhancement for XTS in caam
   - Add support for XIP8001B hwrng in xiphera-trng
   - Add RNG and hash support in sun8i-ce/sun8i-ss
   - Allow imx-rngc to be used by kernel entropy pool
   - Use crypto engine in omap-sham
   - Add support for Ingenic X1830 with ingenic"

* 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6: (205 commits)
  X.509: Fix modular build of public_key_sm2
  crypto: xor - Remove unused variable count in do_xor_speed
  X.509: fix error return value on the failed path
  crypto: bcm - Verify GCM/CCM key length in setkey
  crypto: qat - drop input parameter from adf_enable_aer()
  crypto: qat - fix function parameters descriptions
  crypto: atmel-tdes - use semicolons rather than commas to separate statements
  crypto: drivers - use semicolons rather than commas to separate statements
  hwrng: mxc-rnga - use semicolons rather than commas to separate statements
  hwrng: iproc-rng200 - use semicolons rather than commas to separate statements
  hwrng: stm32 - use semicolons rather than commas to separate statements
  crypto: xor - use ktime for template benchmarking
  crypto: xor - defer load time benchmark to a later time
  crypto: hisilicon/zip - fix the uninitalized 'curr_qm_qp_num'
  crypto: hisilicon/zip - fix the return value when device is busy
  crypto: hisilicon/zip - fix zero length input in GZIP decompress
  crypto: hisilicon/zip - fix the uncleared debug registers
  lib/mpi: Fix unused variable warnings
  crypto: x86/poly1305 - Remove assignments with no effect
  hwrng: npcm - modify readl to readb
  ...
 2020-10-13 08:50:16 -07:00
Nick Desaulniers 865c50e1d2 x86/uaccess: utilize CONFIG_CC_HAS_ASM_GOTO_OUTPUT 
Clang-11 shipped support for outputs to asm goto statments along the
fallthrough path.  Double up some of the get_user() and related macros
to be able to take advantage of this extended GNU C extension. This
should help improve the generated code's performance for these accesses.

Cc: Bill Wendling <morbo@google.com>
Suggested-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 2020-10-12 18:43:08 -07:00
Linus Torvalds d55564cfc2 x86: Make __put_user() generate an out-of-line call 
Instead of inlining the stac/mov/clac sequence (which also requires
individual exception table entries and several asm instruction
alternatives entries), just generate "call __put_user_nocheck_X" for the
__put_user() cases, the same way we changed __get_user earlier.

Unlike the get_user() case, we didn't have the same nice infrastructure
to just generate the call with a single case, so this actually has to
change some of the infrastructure in order to do this.  But that only
cleans up the code further.

So now, instead of using a case statement for the sizes, we just do the
same thing we've done on the get_user() side for a long time: use the
size as an immediate constant to the asm, and generate the asm that way
directly.

In order to handle the special case of 64-bit data on a 32-bit kernel, I
needed to change the calling convention slightly: the data is passed in
%eax[:%edx], the pointer in %ecx, and the return value is also returned
in %ecx.  It used to be returned in %eax, but because of how %eax can
now be a double register input, we don't want mix that with a
single-register output.

The actual low-level asm is easier to handle: we'll just share the code
between the checking and non-checking case, with the non-checking case
jumping into the middle of the function.  That may sound a bit too
special, but this code is all very very special anyway, so...

Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 2020-10-12 16:57:57 -07:00
Linus Torvalds ea6f043fc9 x86: Make __get_user() generate an out-of-line call 
Instead of inlining the whole stac/lfence/mov/clac sequence (which also
requires individual exception table entries and several asm instruction
alternatives entries), just generate "call __get_user_nocheck_X" for the
__get_user() cases.

We can use all the same infrastructure that we already do for the
regular "get_user()", and the end result is simpler source code, and
much simpler code generation.

It also means that when I introduce asm goto with input for
"unsafe_get_user()", there are no nasty interactions with the
__get_user() code.

Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 2020-10-12 16:57:57 -07:00
Linus Torvalds 53acd35050 Merge tag 'locks-v5.10-1' of git://git.kernel.org/pub/scm/linux/kernel/git/jlayton/linux 
Pull file locking fix from Jeff Layton:
 "Just a single patch to fix up some tracepoint output"

* tag 'locks-v5.10-1' of git://git.kernel.org/pub/scm/linux/kernel/git/jlayton/linux:
  locks: Remove extra "0x" in tracepoint format specifier
 2020-10-12 16:50:18 -07:00
Linus Torvalds 22230cd2c5 Merge branch 'compat.mount' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 
Pull compat mount cleanups from Al Viro:
 "The last remnants of mount(2) compat buried by Christoph.

  Buried into NFS, that is.

  Generally I'm less enthusiastic about "let's use in_compat_syscall()
  deep in call chain" kind of approach than Christoph seems to be, but
  in this case it's warranted - that had been an NFS-specific wart,
  hopefully not to be repeated in any other filesystems (read: any new
  filesystem introducing non-text mount options will get NAKed even if
  it doesn't mess the layout up).

  IOW, not worth trying to grow an infrastructure that would avoid that
  use of in_compat_syscall()..."

* 'compat.mount' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  fs: remove compat_sys_mount
  fs,nfs: lift compat nfs4 mount data handling into the nfs code
  nfs: simplify nfs4_parse_monolithic
 2020-10-12 16:44:57 -07:00
Linus Torvalds e18afa5bfa Merge branch 'work.quota-compat' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 
Pull compat quotactl cleanups from Al Viro:
 "More Christoph's compat cleanups: quotactl(2)"

* 'work.quota-compat' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  quota: simplify the quotactl compat handling
  compat: add a compat_need_64bit_alignment_fixup() helper
  compat: lift compat_s64 and compat_u64 to <asm-generic/compat.h>
 2020-10-12 16:37:13 -07:00
Linus Torvalds 85ed13e78d Merge branch 'work.iov_iter' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 
Pull compat iovec cleanups from Al Viro:
 "Christoph's series around import_iovec() and compat variant thereof"

* 'work.iov_iter' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  security/keys: remove compat_keyctl_instantiate_key_iov
  mm: remove compat_process_vm_{readv,writev}
  fs: remove compat_sys_vmsplice
  fs: remove the compat readv/writev syscalls
  fs: remove various compat readv/writev helpers
  iov_iter: transparently handle compat iovecs in import_iovec
  iov_iter: refactor rw_copy_check_uvector and import_iovec
  iov_iter: move rw_copy_check_uvector() into lib/iov_iter.c
  compat.h: fix a spelling error in <linux/compat.h>
 2020-10-12 16:35:51 -07:00
Linus Torvalds c90578360c Merge branch 'work.csum_and_copy' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 
Pull copy_and_csum cleanups from Al Viro:
 "Saner calling conventions for csum_and_copy_..._user() and friends"

[ Removing 800+ lines of code and cleaning stuff up is good  - Linus ]

* 'work.csum_and_copy' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  ppc: propagate the calling conventions change down to csum_partial_copy_generic()
  amd64: switch csum_partial_copy_generic() to new calling conventions
  sparc64: propagate the calling convention changes down to __csum_partial_copy_...()
  xtensa: propagate the calling conventions change down into csum_partial_copy_generic()
  mips: propagate the calling convention change down into __csum_partial_copy_..._user()
  mips: __csum_partial_copy_kernel() has no users left
  mips: csum_and_copy_{to,from}_user() are never called under KERNEL_DS
  sparc32: propagate the calling conventions change down to __csum_partial_copy_sparc_generic()
  i386: propagate the calling conventions change down to csum_partial_copy_generic()
  sh: propage the calling conventions change down to csum_partial_copy_generic()
  m68k: get rid of zeroing destination on error in csum_and_copy_from_user()
  arm: propagate the calling convention changes down to csum_partial_copy_from_user()
  alpha: propagate the calling convention changes down to csum_partial_copy.c helpers
  saner calling conventions for csum_and_copy_..._user()
  csum_and_copy_..._user(): pass 0xffffffff instead of 0 as initial sum
  csum_partial_copy_nocheck(): drop the last argument
  unify generic instances of csum_partial_copy_nocheck()
  icmp_push_reply(): reorder adding the checksum up
  skb_copy_and_csum_bits(): don't bother with the last argument
 2020-10-12 16:24:13 -07:00
Linus Torvalds 50d228345a Merge tag 'docs-5.10' of git://git.lwn.net/linux 
Pull documentation updates from Jonathan Corbet:
 "As hoped, things calmed down for docs this cycle; fewer changes and
  almost no conflicts at all. This includes:

   - A reworked and expanded user-mode Linux document

   - Some simplifications and improvements for submitting-patches.rst

   - An emergency fix for (some) problems with Sphinx 3.x

   - Some welcome automarkup improvements to automatically generate
     cross-references to struct definitions and other documents

   - The usual collection of translation updates, typo fixes, etc"

* tag 'docs-5.10' of git://git.lwn.net/linux: (81 commits)
  gpiolib: Update indentation in driver.rst for code excerpts
  Documentation/admin-guide: tainted-kernels: Fix typo occured
  Documentation: better locations for sysfs-pci, sysfs-tagging
  docs: programming-languages: refresh blurb on clang support
  Documentation: kvm: fix a typo
  Documentation: Chinese translation of Documentation/arm64/amu.rst
  doc: zh_CN: index files in arm64 subdirectory
  mailmap: add entry for <mstarovoitov@marvell.com>
  doc: seq_file: clarify role of *pos in ->next()
  docs: trace: ring-buffer-design.rst: use the new SPDX tag
  Documentation: kernel-parameters: clarify "module." parameters
  Fix references to nommu-mmap.rst
  docs: rewrite admin-guide/sysctl/abi.rst
  docs: fb: Remove vesafb scrollback boot option
  docs: fb: Remove sstfb scrollback boot option
  docs: fb: Remove matroxfb scrollback boot option
  docs: fb: Remove framebuffer scrollback boot option
  docs: replace the old User Mode Linux HowTo with a new one
  Documentation/admin-guide: blockdev/ramdisk: remove use of "rdev"
  Documentation/admin-guide: README & svga: remove use of "rdev"
  ...
 2020-10-12 16:21:29 -07:00
Linus Torvalds ced3a9eb3c Merge tag 'ia64_for_5.10' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux 
Pull ia64 updates from Tony Luck:
 "Cleanups by Christoph:

   - Switch to libata instead of legacy ide driver

   - Drop ia64 perfmon (it's been broken for a while)"

* tag 'ia64_for_5.10' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux:
  ia64: Use libata instead of the legacy ide driver in defconfigs
  ia64: Remove perfmon
 2020-10-12 16:20:31 -07:00
Linus Torvalds 2646fb032f Merge tag 'x86-hyperv-2020-10-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 
Pull x86 Hyper-V update from Ingo Molnar:
 "A single commit harmonizing the x86 and ARM64 Hyper-V constants
  namespace"

* tag 'x86-hyperv-2020-10-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/hyperv: Remove aliases with X64 in their name
 2020-10-12 15:30:32 -07:00
Linus Torvalds ee4a925107 Merge tag 'x86-paravirt-2020-10-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 
Pull x86 paravirt cleanup from Ingo Molnar:
 "Clean up the paravirt code after the removal of 32-bit Xen PV support"

* tag 'x86-paravirt-2020-10-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/paravirt: Avoid needless paravirt step clearing page table entries
  x86/paravirt: Remove set_pte_at() pv-op
  x86/entry/32: Simplify CONFIG_XEN_PV build dependency
  x86/paravirt: Use CONFIG_PARAVIRT_XXL instead of CONFIG_PARAVIRT
  x86/paravirt: Clean up paravirt macros
  x86/paravirt: Remove 32-bit support from CONFIG_PARAVIRT_XXL
 2020-10-12 15:15:24 -07:00
Linus Torvalds ad884ff329 Merge tag 'x86-build-2020-10-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 
Pull x86 build update from Ingo Molnar:
 "Remove a couple of ancient and distracting printouts from the x86
  build, such as the CRC sum or limited size data - most of which can be
  gained via tools"

* tag 'x86-build-2020-10-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/build: Declutter the build output
 2020-10-12 15:14:11 -07:00
Linus Torvalds c1b4ec85ee Merge tag 'x86-mm-2020-10-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 
Pull x86 mm updates from Ingo Molnar:
 "Do not sync vmalloc/ioremap mappings on x86-64 kernels.

  Hopefully now without the bugs!"

* tag 'x86-mm-2020-10-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/mm/64: Update comment in preallocate_vmalloc_pages()
  x86/mm/64: Do not sync vmalloc/ioremap mappings
 2020-10-12 15:02:38 -07:00
Linus Torvalds b85cac5745 Merge tag 'x86-kaslr-2020-10-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 
Pull x86 kaslr updates from Ingo Molnar:
 "This cleans up and simplifies the x86 KASLR code, and also fixes some
  corner case bugs"

* tag 'x86-kaslr-2020-10-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (22 commits)
  x86/kaslr: Replace strlen() with strnlen()
  x86/kaslr: Add a check that the random address is in range
  x86/kaslr: Make local variables 64-bit
  x86/kaslr: Replace 'unsigned long long' with 'u64'
  x86/kaslr: Make minimum/image_size 'unsigned long'
  x86/kaslr: Small cleanup of find_random_phys_addr()
  x86/kaslr: Drop unnecessary alignment in find_random_virt_addr()
  x86/kaslr: Drop redundant check in store_slot_info()
  x86/kaslr: Make the type of number of slots/slot areas consistent
  x86/kaslr: Drop test for command-line parameters before parsing
  x86/kaslr: Simplify process_gb_huge_pages()
  x86/kaslr: Short-circuit gb_huge_pages on x86-32
  x86/kaslr: Fix off-by-one error in process_gb_huge_pages()
  x86/kaslr: Drop some redundant checks from __process_mem_region()
  x86/kaslr: Drop redundant variable in __process_mem_region()
  x86/kaslr: Eliminate 'start_orig' local variable from __process_mem_region()
  x86/kaslr: Drop redundant cur_entry from __process_mem_region()
  x86/kaslr: Fix off-by-one error in __process_mem_region()
  x86/kaslr: Initialize mem_limit to the real maximum address
  x86/kaslr: Fix process_efi_entries comment
  ...
 2020-10-12 14:42:19 -07:00
Linus Torvalds 1c6890707e Merge tag 'perf-kprobes-2020-10-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 
Pull perf/kprobes updates from Ingo Molnar:
 "This prepares to unify the kretprobe trampoline handler and make
  kretprobe lockless (those patches are still work in progress)"

* tag 'perf-kprobes-2020-10-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  kprobes: Fix to check probe enabled before disarm_kprobe_ftrace()
  kprobes: Make local functions static
  kprobes: Free kretprobe_instance with RCU callback
  kprobes: Remove NMI context check
  sparc: kprobes: Use generic kretprobe trampoline handler
  sh: kprobes: Use generic kretprobe trampoline handler
  s390: kprobes: Use generic kretprobe trampoline handler
  powerpc: kprobes: Use generic kretprobe trampoline handler
  parisc: kprobes: Use generic kretprobe trampoline handler
  mips: kprobes: Use generic kretprobe trampoline handler
  ia64: kprobes: Use generic kretprobe trampoline handler
  csky: kprobes: Use generic kretprobe trampoline handler
  arc: kprobes: Use generic kretprobe trampoline handler
  arm64: kprobes: Use generic kretprobe trampoline handler
  arm: kprobes: Use generic kretprobe trampoline handler
  x86/kprobes: Use generic kretprobe trampoline handler
  kprobes: Add generic kretprobe trampoline handler
 2020-10-12 14:21:15 -07:00
Linus Torvalds 3bff6112c8 Merge tag 'perf-core-2020-10-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 
Pull performance events updates from Ingo Molnar:
 "x86 Intel updates:

   - Add Jasper Lake support

   - Add support for TopDown metrics on Ice Lake

   - Fix Ice Lake & Tiger Lake uncore support, add Snow Ridge support

   - Add a PCI sub driver to support uncore PMUs where the PCI resources
     have been claimed already - extending the range of supported
     systems.

  x86 AMD updates:

   - Restore 'perf stat -a' behaviour to program the uncore PMU to count
     all CPU threads.

   - Fix setting the proper count when sampling Large Increment per
     Cycle events / 'paired' events.

   - Fix IBS Fetch sampling on F17h and some other IBS fine tuning,
     greatly reducing the number of interrupts when large sample periods
     are specified.

   - Extends Family 17h RAPL support to also work on compatible F19h
     machines.

  Core code updates:

   - Fix race in perf_mmap_close()

   - Add PERF_EV_CAP_SIBLING, to denote that sibling events should be
     closed if the leader is removed.

   - Smaller fixes and updates"

* tag 'perf-core-2020-10-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (45 commits)
  perf/core: Fix race in the perf_mmap_close() function
  perf/x86: Fix n_metric for cancelled txn
  perf/x86: Fix n_pair for cancelled txn
  x86/events/amd/iommu: Fix sizeof mismatch
  perf/x86/intel: Check perf metrics feature for each CPU
  perf/x86/intel: Fix Ice Lake event constraint table
  perf/x86/intel/uncore: Fix the scale of the IMC free-running events
  perf/x86/intel/uncore: Fix for iio mapping on Skylake Server
  perf/x86/msr: Add Jasper Lake support
  perf/x86/intel: Add Jasper Lake support
  perf/x86/intel/uncore: Reduce the number of CBOX counters
  perf/x86/intel/uncore: Update Ice Lake uncore units
  perf/x86/intel/uncore: Split the Ice Lake and Tiger Lake MSR uncore support
  perf/x86/intel/uncore: Support PCIe3 unit on Snow Ridge
  perf/x86/intel/uncore: Generic support for the PCI sub driver
  perf/x86/intel/uncore: Factor out uncore_pci_pmu_unregister()
  perf/x86/intel/uncore: Factor out uncore_pci_pmu_register()
  perf/x86/intel/uncore: Factor out uncore_pci_find_dev_pmu()
  perf/x86/intel/uncore: Factor out uncore_pci_get_dev_die_info()
  perf/amd/uncore: Inform the user how many counters each uncore PMU has
  ...
 2020-10-12 14:14:35 -07:00
Linus Torvalds dd502a8107 Merge tag 'core-static_call-2020-10-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 
Pull static call support from Ingo Molnar:
 "This introduces static_call(), which is the idea of static_branch()
  applied to indirect function calls. Remove a data load (indirection)
  by modifying the text.

  They give the flexibility of function pointers, but with better
  performance. (This is especially important for cases where retpolines
  would otherwise be used, as retpolines can be pretty slow.)

  API overview:

      DECLARE_STATIC_CALL(name, func);
      DEFINE_STATIC_CALL(name, func);
      DEFINE_STATIC_CALL_NULL(name, typename);

      static_call(name)(args...);
      static_call_cond(name)(args...);
      static_call_update(name, func);

  x86 is supported via text patching, otherwise basic indirect calls are
  used, with function pointers.

  There's a second variant using inline code patching, inspired by
  jump-labels, implemented on x86 as well.

  The new APIs are utilized in the x86 perf code, a heavy user of
  function pointers, where static calls speed up the PMU handler by
  4.2% (!).

  The generic implementation is not really excercised on other
  architectures, outside of the trivial test_static_call_init()
  self-test"

* tag 'core-static_call-2020-10-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (21 commits)
  static_call: Fix return type of static_call_init
  tracepoint: Fix out of sync data passing by static caller
  tracepoint: Fix overly long tracepoint names
  x86/perf, static_call: Optimize x86_pmu methods
  tracepoint: Optimize using static_call()
  static_call: Allow early init
  static_call: Add some validation
  static_call: Handle tail-calls
  static_call: Add static_call_cond()
  x86/alternatives: Teach text_poke_bp() to emulate RET
  static_call: Add simple self-test for static calls
  x86/static_call: Add inline static call implementation for x86-64
  x86/static_call: Add out-of-line static call implementation
  static_call: Avoid kprobes on inline static_call()s
  static_call: Add inline static call infrastructure
  static_call: Add basic static call infrastructure
  compiler.h: Make __ADDRESSABLE() symbol truly unique
  jump_label,module: Fix module lifetime for __jump_label_mod_text_reserved()
  module: Properly propagate MODULE_STATE_COMING failure
  module: Fix up module_notifier return values
  ...
 2020-10-12 13:58:15 -07:00
Linus Torvalds 34eb62d868 Merge tag 'core-build-2020-10-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 
Pull orphan section checking from Ingo Molnar:
 "Orphan link sections were a long-standing source of obscure bugs,
  because the heuristics that various linkers & compilers use to handle
  them (include these bits into the output image vs discarding them
  silently) are both highly idiosyncratic and also version dependent.

  Instead of this historically problematic mess, this tree by Kees Cook
  (et al) adds build time asserts and build time warnings if there's any
  orphan section in the kernel or if a section is not sized as expected.

  And because we relied on so many silent assumptions in this area, fix
  a metric ton of dependencies and some outright bugs related to this,
  before we can finally enable the checks on the x86, ARM and ARM64
  platforms"

* tag 'core-build-2020-10-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (36 commits)
  x86/boot/compressed: Warn on orphan section placement
  x86/build: Warn on orphan section placement
  arm/boot: Warn on orphan section placement
  arm/build: Warn on orphan section placement
  arm64/build: Warn on orphan section placement
  x86/boot/compressed: Add missing debugging sections to output
  x86/boot/compressed: Remove, discard, or assert for unwanted sections
  x86/boot/compressed: Reorganize zero-size section asserts
  x86/build: Add asserts for unwanted sections
  x86/build: Enforce an empty .got.plt section
  x86/asm: Avoid generating unused kprobe sections
  arm/boot: Handle all sections explicitly
  arm/build: Assert for unwanted sections
  arm/build: Add missing sections
  arm/build: Explicitly keep .ARM.attributes sections
  arm/build: Refactor linker script headers
  arm64/build: Assert for unwanted sections
  arm64/build: Add missing DWARF sections
  arm64/build: Use common DISCARDS in linker script
  arm64/build: Remove .eh_frame* sections due to unwind tables
  ...
 2020-10-12 13:39:19 -07:00
Linus Torvalds e6412f9833 Merge tag 'efi-core-2020-10-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 
Pull EFI changes from Ingo Molnar:

 - Preliminary RISC-V enablement - the bulk of it will arrive via the
   RISCV tree.

 - Relax decompressed image placement rules for 32-bit ARM

 - Add support for passing MOK certificate table contents via a config
   table rather than a EFI variable.

 - Add support for 18 bit DIMM row IDs in the CPER records.

 - Work around broken Dell firmware that passes the entire Boot####
   variable contents as the command line

 - Add definition of the EFI_MEMORY_CPU_CRYPTO memory attribute so we
   can identify it in the memory map listings.

 - Don't abort the boot on arm64 if the EFI RNG protocol is available
   but returns with an error

 - Replace slashes with exclamation marks in efivarfs file names

 - Split efi-pstore from the deprecated efivars sysfs code, so we can
   disable the latter on !x86.

 - Misc fixes, cleanups and updates.

* tag 'efi-core-2020-10-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (26 commits)
  efi: mokvar: add missing include of asm/early_ioremap.h
  efi: efivars: limit availability to X86 builds
  efi: remove some false dependencies on CONFIG_EFI_VARS
  efi: gsmi: fix false dependency on CONFIG_EFI_VARS
  efi: efivars: un-export efivars_sysfs_init()
  efi: pstore: move workqueue handling out of efivars
  efi: pstore: disentangle from deprecated efivars module
  efi: mokvar-table: fix some issues in new code
  efi/arm64: libstub: Deal gracefully with EFI_RNG_PROTOCOL failure
  efivarfs: Replace invalid slashes with exclamation marks in dentries.
  efi: Delete deprecated parameter comments
  efi/libstub: Fix missing-prototypes in string.c
  efi: Add definition of EFI_MEMORY_CPU_CRYPTO and ability to report it
  cper,edac,efi: Memory Error Record: bank group/address and chip id
  edac,ghes,cper: Add Row Extension to Memory Error Record
  efi/x86: Add a quirk to support command line arguments on Dell EFI firmware
  efi/libstub: Add efi_warn and *_once logging helpers
  integrity: Load certs from the EFI MOK config table
  integrity: Move import of MokListRT certs to a separate routine
  efi: Support for MOK variable config table
  ...
 2020-10-12 13:26:49 -07:00