linux-stable.git/tools/include, branch v7.0.10

tools/nolibc: avoid -Wundef warning for __STDC_VERSION__

2026-05-23T11:08:32+00:00

[ Upstream commit 3eb97c4cbd4d874e7e327ec512f6169934e12b8a ]

With -std=c89 the macro __STDC_VERSION__ is not defined.
While undefined identifiers in '#if' directives are assumed to be '0',
with -Wundef a warning is emitted.

Avoid the warning by explicitly falling back to '0' if __STDC_VERSION__
is not provided by the preprocessor.

Fixes: 37219aa5b123 ("tools/nolibc: add __nolibc_static_assert()")
Signed-off-by: Thomas Weißschuh 
Acked-by: Willy Tarreau 
Link: https://patch.msgid.link/20260318-nolibc-wundef-v1-1-fcb7f9ac7298@weissschuh.net
Signed-off-by: Sasha Levin

tools/nolibc: MIPS: fix clobbers of 'lo' and 'hi' registers on different ISAs

2026-05-23T11:08:32+00:00

[ Upstream commit e83b07dc8c05a55d02057b1484724a0b188f6f8d ]

All MIPS ISAs before r6 use the 'lo' and 'hi' special registers.
These are clobbered by system calls and need to be marked as such to
avoid miscompilations. Currently nolibc ties the clobbers to the ABI.
But this is wrong and leads to ISA<->ABI combinations which are not
handled correctly, leading to compiler errors or miscompilations.

Handle all different combinations of ABI and ISA.

Fixes: a6a2a8a42972 ("tools/nolibc: MIPS: add support for N64 and N32 ABIs")
Fixes: 66b6f755ad45 ("rcutorture: Import a copy of nolibc")
Suggested-by: Maciej W. Rozycki 
Link: https://lore.kernel.org/lkml/alpine.DEB.2.21.2603141744240.55200@angie.orcam.me.uk/
Signed-off-by: Thomas Weißschuh 
Link: https://patch.msgid.link/20260317-nolibc-mips-clobber-v2-1-5b9a97761a9e@linutronix.de
Signed-off-by: Thomas Weißschuh 
Signed-off-by: Sasha Levin

tools/nolibc/printf: Move snprintf length check to callback

2026-05-23T11:08:32+00:00

[ Upstream commit 4045e7b19bbf7338452cda11e64cfe7ae3361964 ]

Move output truncation to the snprintf() callback.
This simplifies the main code and fixes truncation of padded fields.

Add a zero length callback to 'finalise' the buffer rather than
doing it in snprintf() itself.

Fixes: e90ce42e81381 ("tools/nolibc: implement width padding in printf()")
Signed-off-by: David Laight 
Acked-by: Willy Tarreau 
Link: https://patch.msgid.link/20260302101815.3043-3-david.laight.linux@gmail.com
[Thomas: clean up Fixes trailer]
Signed-off-by: Thomas Weißschuh 
Signed-off-by: Sasha Levin

tools/nolibc/printf: Change variables 'c' to 'ch' and 'tmpbuf[]' to 'outbuf[]'

2026-05-23T11:08:32+00:00

[ Upstream commit f675ae28fcdf7db93a8c1a6964f062725b1e06a0 ]

Changing 'c' makes the code slightly easier to read because the variable
stands out from the single character literals (especially 'c').

Change tmpbuf[] to outbuf[] because 'out' points into it.

The following patches pretty much rewrite the function so the
churn is limited.

Signed-off-by: David Laight 
Acked-by: Willy Tarreau 
Link: https://patch.msgid.link/20260223101735.2922-7-david.laight.linux@gmail.com
Signed-off-by: Thomas Weißschuh 
Stable-dep-of: 4045e7b19bbf ("tools/nolibc/printf: Move snprintf length check to callback")
Signed-off-by: Sasha Levin

tools headers: Synchronize linux/build_bug.h with the kernel sources

2026-03-22T21:34:39+00:00

To pick up the changes in:

  6ffd853b0b10e1e2 ("build_bug.h: correct function parameters names in kernel-doc")

That just add some comments, addressing this perf tools build warning:

  Warning: Kernel ABI header differences:
    diff -u tools/include/linux/build_bug.h include/linux/build_bug.h

Please take a look at tools/include/uapi/README for further info on this
synchronization process.

Cc: Andrew Morton 
Cc: Ian Rogers 
Cc: Randy Dunlap 
Signed-off-by: Arnaldo Carvalho de Melo

tools headers UAPI: Sync linux/kvm.h with the kernel sources

2026-03-22T21:31:54+00:00

To pick the changes in:

  da142f3d373a6dda ("KVM: Remove subtle "struct kvm_stats_desc" pseudo-overlay")

That just rebuilds perf, as these patches don't add any new KVM ioctl to
be harvested for the 'perf trace' ioctl syscall argument beautifiers.

This addresses this perf build warning:

  Warning: Kernel ABI header differences:
    diff -u tools/include/uapi/linux/kvm.h include/uapi/linux/kvm.h

Please see tools/include/uapi/README for further details.

Cc: Sean Christopherson 
Signed-off-by: Arnaldo Carvalho de Melo

Merge tag 'perf-tools-fixes-for-v7.0-1-2026-03-13' of git://git.kernel.org/pub/scm/linux/kernel/git/perf/perf-tools

2026-03-13T21:24:15+00:00

Pull perf tools fixes from Arnaldo Carvalho de Melo:

 - Fix stale build ID in module MMAP2 records in events synthesized for
   pre-existing processes

 - Fix rust cross compilation

 - hashmap__new() error pointer return handling fixes

 - Fix off-by-one bug in outside of functions check on the disasm code

 - Update header copies of kernel headers, including prctl.h, mount.h,
   fs.h, irq_vectors.h, perf_event.h, gfp_types.h, kvm.h, cpufeatures.h
   msr-index.h, also the syscall tables files that introduced the
   'rseq_slice_yield' syscall

 - Finish removal of ETM_OPT_* on the ARM coresight support, needed to
   sync the coresight-pmu.h header with the kernel sources

 - Make in-target rule robust against too long argument error

* tag 'perf-tools-fixes-for-v7.0-1-2026-03-13' of git://git.kernel.org/pub/scm/linux/kernel/git/perf/perf-tools: (22 commits)
  perf synthetic-events: Fix stale build ID in module MMAP2 records
  perf annotate loongarch: Fix off-by-one bug in outside check
  perf ftrace: Fix hashmap__new() error checking
  perf annotate: Fix hashmap__new() error checking
  perf cs-etm: Sync coresight-pmu.h header with the kernel sources
  perf cs-etm: Finish removal of ETM_OPT_*
  tools headers UAPI: Update tools' copy of linux/coresight-pmu.h
  tools headers: Update the syscall tables and unistd.h, to support the new 'rseq_slice_yield' syscall
  perf disasm: Fix off-by-one bug in outside check
  tools arch x86: Sync msr-index.h to pick MSR_{OMR_[0-3],CORE_PERF_GLOBAL_STATUS_SET}
  tools headers UAPI: Sync x86's asm/kvm.h with the kernel sources
  tools headers x86 cpufeatures: Sync with the kernel sources
  tools headers UAPI: Sync linux/kvm.h with the kernel sources
  tools headers: Update the linux/gfp_types.h copy with the kernel sources
  perf beauty: Update the linux/perf_event.h copy with the kernel sources
  perf beauty: Update the arch/x86/include/asm/irq_vectors.h copy with the kernel sources
  perf beauty: Sync UAPI linux/fs.h with kernel sources
  perf beauty: Sync linux/mount.h copy with the kernel sources
  tools build: Fix rust cross compilation
  perf build: Prevent "argument list too long" error
  ...

Merge tag 'mm-hotfixes-stable-2026-03-09-16-36' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

2026-03-10T19:47:56+00:00

Pull misc fixes from Andrew Morton:
 "15 hotfixes. 6 are cc:stable. 14 are for MM.

  Singletons, with one doubleton - please see the changelogs for details"

* tag 'mm-hotfixes-stable-2026-03-09-16-36' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm:
  MAINTAINERS, mailmap: update email address for Lorenzo Stoakes
  mm/mmu_notifier: clean up mmu_notifier.h kernel-doc
  uaccess: correct kernel-doc parameter format
  mm/huge_memory: fix a folio_split() race condition with folio_try_get()
  MAINTAINERS: add co-maintainer and reviewer for SLAB ALLOCATOR
  MAINTAINERS: add RELAY entry
  memcg: fix slab accounting in refill_obj_stock() trylock path
  mm/hugetlb.c: use __pa() instead of virt_to_phys() in early bootmem alloc code
  zram: rename writeback_compressed device attr
  tools/testing: fix testing/vma and testing/radix-tree build
  Revert "ptdesc: remove references to folios from __pagetable_ctor() and pagetable_dtor()"
  mm/cma: move put_page_testzero() out of VM_WARN_ON in cma_release()
  mm/damon/core: clear walk_control on inactive context in damos_walk()
  mm: memfd_luo: always dirty all folios
  mm: memfd_luo: always make all folios uptodate

perf cs-etm: Sync coresight-pmu.h header with the kernel sources

2026-03-10T12:52:00+00:00

Update the header to pull in the changes from commit 3285c471d0c0b991
("coresight: Remove misleading definitions").

Signed-off-by: James Clark 
Requested-by: Arnaldo Carvalho de Melo 
Tested-by: Leo Yan 
Cc: Adrian Hunter 
Cc: Alexander Shishkin 
Cc: Ian Rogers 
Cc: Ingo Molnar 
Cc: Jiri Olsa 
Cc: John Garry 
Cc: Leo Yan 
Cc: Mark Rutland 
Cc: Mike Leach 
Cc: Namhyung Kim 
Cc: Peter Zijlstra 
Cc: Suzuki Poulouse 
Cc: Will Deacon 
Link: https://lore.kernel.org/r/557db631-aef8-43b1-9f45-fae75910ccb4@linaro.org
Signed-off-by: Arnaldo Carvalho de Melo

tools headers: Update the syscall tables and unistd.h, to support the new 'rseq_slice_yield' syscall

2026-03-05T20:20:23+00:00

Picking up the changes from these csets:

  2153b2e8917b73e9 ("sparc: Add architecture support for clone3")
  99d2592023e5d0a3 ("rseq: Implement sys_rseq_slice_yield()")
  4ac286c4a8d904c8 ("s390/syscalls: Switch to generic system call table generation")

This makes 'perf trace' support it, now its possible, for instance, to
do:

  # perf trace -e rseq_slice_yield --max-stack=16

Here is an example with the 'sendmmsg' syscall:

  root@x1:~# perf trace -e sendmmsg --max-stack 16 --max-events=1
       0.000 ( 0.062 ms): dbus-broker/1012 sendmmsg(fd: 150, mmsg: 0x7ffef57cca50, vlen: 1, flags: DONTWAIT|NOSIGNAL) = 1
                                         syscall_exit_to_user_mode_prepare ([kernel.kallsyms])
                                         syscall_exit_to_user_mode_prepare ([kernel.kallsyms])
                                         syscall_exit_to_user_mode ([kernel.kallsyms])
                                         do_syscall_64 ([kernel.kallsyms])
                                         entry_SYSCALL_64 ([kernel.kallsyms])
                                         [0x117ce7] (/usr/lib64/libc.so.6 (deleted))
  root@x1:~#

To do a system wide tracing of the new 'rseq_slice_yield' syscall with a
backtrace of at most 16 entries.

This addresses these perf tools build warnings:

  Warning: Kernel ABI header differences:
    diff -u tools/include/uapi/asm-generic/unistd.h include/uapi/asm-generic/unistd.h
    diff -u tools/scripts/syscall.tbl scripts/syscall.tbl
    diff -u tools/perf/arch/x86/entry/syscalls/syscall_32.tbl arch/x86/entry/syscalls/syscall_32.tbl
    diff -u tools/perf/arch/x86/entry/syscalls/syscall_64.tbl arch/x86/entry/syscalls/syscall_64.tbl
    diff -u tools/perf/arch/powerpc/entry/syscalls/syscall.tbl arch/powerpc/kernel/syscalls/syscall.tbl
    diff -u tools/perf/arch/s390/entry/syscalls/syscall.tbl arch/s390/kernel/syscalls/syscall.tbl
    diff -u tools/perf/arch/mips/entry/syscalls/syscall_n64.tbl arch/mips/kernel/syscalls/syscall_n64.tbl
    diff -u tools/perf/arch/arm/entry/syscalls/syscall.tbl arch/arm/tools/syscall.tbl
    diff -u tools/perf/arch/sh/entry/syscalls/syscall.tbl arch/sh/kernel/syscalls/syscall.tbl
    diff -u tools/perf/arch/sparc/entry/syscalls/syscall.tbl arch/sparc/kernel/syscalls/syscall.tbl
    diff -u tools/perf/arch/xtensa/entry/syscalls/syscall.tbl arch/xtensa/kernel/syscalls/syscall.tbl

Cc: Andreas Larsson 
Cc: Heiko Carstens 
Cc: Ludwig Rydberg 
Cc: Peter Zijlstra 
Cc: Thomas Gleixner 
Signed-off-by: Arnaldo Carvalho de Melo