linux-stable.git/tools/include, branch v7.2.6

xsk: align TX metadata layout across ABIs

2026-09-14T11:41:05+00:00

[ Upstream commit bd7d30bd1d3856d8354b5acef947d68ad1faf886 ]

Add explicit padding before launch_time so xsk_tx_metadata has the same
layout on 32-bit and 64-bit systems.

On several architectures (csky, i386, nios2, m65k, openrisc, sh), the old
native 32-bit layout put launch_time at offset 12 and had a natural size of
20 bytes. Using sizeof(struct xsk_tx_metadata) as tx_metadata_len was already
rejected because the length must be a multiple of eight, so the
straightforward use of the interface was broken on those ABIs. Userspace
could still register a padded length of 24 bytes, though; mixing the old and
new layouts then silently reads launch_time from the wrong offset and
misprograms packet launch times. This intentionally replaces that
incompatible layout because the affected architectures are unlikely to
have any notable users. (x86_64 and arm64 have the most users and are _not_
affected)

Fixes: ca4419f15abd ("xsk: Add launch time hardware offload support to XDP Tx metadata")
Reviewed-by: Simon Horman 
Signed-off-by: Stanislav Fomichev 
Link: https://patch.msgid.link/20260819160535.1472459-2-sdf@fomichev.me
Signed-off-by: Jakub Kicinski 
Signed-off-by: Sasha Levin

tools: Ensure tools copy of linux/filter.h exports the UAPI

2026-09-14T11:40:24+00:00

[ Upstream commit 7a1f400ff5e57f41e23c8145a54ea084039b023c ]

Normally when there is an include/foo.h and an include/uapi/foo.h the
non-UAPI copy includes the UAPI copy.  This is the case for the in
kernel copy of linux/filter.h but not for the copy in tools/ which
results in build breaks for the newly added arm64
seccomp_ptrace_x0_bypass selftest.  Add an explicit include of the uapi
to fix the test and avoid future surprises.

Fixes: 2fcbc4adf997 ("kselftest/arm64: Add seccomp ptrace x0 bypass test")
Fixes: f143c11bb7b9 ("tools: bpf: Use local copy of headers including uapi/linux/filter.h")
Signed-off-by: Mark Brown 
Signed-off-by: Will Deacon 
Signed-off-by: Sasha Levin

tools/nolibc/powerpc: mark ctr and xer as clobbered by system call

2026-09-14T11:39:56+00:00

[ Upstream commit b9fc5a1742b0c8fb7edf066cc17fa0b18b7be623 ]

The system call can clobber the ctr and xer registers.

Make sure the compiler takes this into account.

The missing clobbers only seem to be an issue with newer compilers.

Fixes: 0cb0675ec37e ("tools/nolibc: add support for powerpc")
Signed-off-by: Thomas Weißschuh 
Link: https://patch.msgid.link/20260727-nolibc-powerpc-clobber-v1-1-e0911cc99ce1@linutronix.de
Signed-off-by: Thomas Weißschuh 
Signed-off-by: Sasha Levin

tools/nolibc: mark arg1 operand in __nolibc_syscall0() as write-only

2026-09-14T11:39:13+00:00

[ Upstream commit a3b2181459a2c74c03ddbad585f884eefc8ff8ff ]

__nolibc_syscall0() does not set the arg1 variable before passing it to
the asm block. This uninitialized variable read is undefined behavior.
Clang can miscompile this.

Mark the asm operand as write-only to fix this.

Fixes: 8e1930296f92 ("tools/nolibc: Add support for SPARC")
Signed-off-by: Thomas Weißschuh 
Acked-by: Willy Tarreau 
Link: https://patch.msgid.link/20260703-nolibc-sparc-asm-v1-1-c7fe73e2e777@weissschuh.net
Signed-off-by: Sasha Levin

tools/compiler: match glibc 2.42 definition of __attribute_const__

2026-09-07T15:36:36+00:00

commit 8700a4761beb219873956666cf91776a2c61e698 upstream.

glibc 2.42 added __attribute_const__ to sys/cdefs.h:

    # define __attribute_const__ __attribute__ ((__const__))

GCC 15 warns when a macro is redefined to a different replacement list
(-Wbuiltin-macro-redefined). Since host tool Makefiles (resolve_btfids,
objtool) pass -Werror, this conflict becomes fatal.

The warning is suppressed on standard native builds because GCC treats
/usr/include as a system header path (-isystem), and macro-redefinition
warnings from system headers are silently suppressed by GCC. It fires
when glibc headers are on a regular include path (-I) instead, which
is the case in cross-compilation setups such as NixOS, where the
sysroot's glibc is passed explicitly via -I rather than -isystem.

Per (C11 6.10.3), identical replacement lists are accepted silently.
Match the glibc definition exactly, including the space before "((", so
the redefinition is accepted without warning regardless of whether
glibc headers are treated as system or non-system includes.

Link: https://lore.kernel.org/20260701200635.3992767-1-rkr0k0r@gmail.com
Signed-off-by: Joy H.J. Lee 
Cc: Nathan Chancellor 
Cc: David Laight 
Cc: 
Signed-off-by: Andrew Morton 
Signed-off-by: Greg Kroah-Hartman

tools headers: Sync KVM headers with the kernel sources

2026-07-22T00:00:10+00:00

To pick up the changes in:

  103ff3a50e3a50a9 ("KVM: s390: Add capability to support 2G hugepages")
  229132c309d667bb ("LoongArch: KVM: Add DMSINTC device support")
  2619da73bb2f10d8 ("KVM: x86: Use __DECLARE_FLEX_ARRAY() for UAPI structures with VLAs")
  4aebd7d5c72f805e ("KVM: s390: Add KVM capability for ESA mode guests")
  4f256d5770febb9d ("KVM: x86: nSVM: Save/restore gPAT with KVM_{GET,SET}_NESTED_STATE")
  822790ab01495d67 ("KVM: x86: Define KVM_X86_QUIRK_NESTED_SVM_SHARED_PAT")
  8800dbf6614aad10 ("KVM: arm64: Allow userspace to create protected VMs when pKVM is enabled")
  bf8f3cec939db68e ("KVM: s390: vsie: Refactor handle_stfle")
  c547c51ff4d44c78 ("KVM: arm64: gic-v5: Add ARM_VGIC_V5 device to KVM headers")
  d7507a94a0720223 ("KVM: SVM: Treat exit_code as an unsigned 64-bit value through all of KVM")

This addresses these perf build warnings:

  Warning: Kernel ABI header differences:
    diff -u tools/include/uapi/linux/kvm.h include/uapi/linux/kvm.h
    diff -u tools/arch/x86/include/uapi/asm/kvm.h arch/x86/include/uapi/asm/kvm.h
    diff -u tools/arch/x86/include/uapi/asm/svm.h arch/x86/include/uapi/asm/svm.h
    diff -u tools/arch/s390/include/uapi/asm/kvm.h arch/s390/include/uapi/asm/kvm.h

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

Signed-off-by: Arnaldo Carvalho de Melo

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

2026-07-22T00:00:09+00:00

To pick up the changes in:

  b56ca146a2b27501 ("vmalloc: add __GFP_SKIP_KASAN support")
  6a288a4ddb4a9944 ("mm/page_alloc: fix initialization of tags of the huge zero folio with init_on_free")

That just rebuilds perf, silencing this build warning.

This addresses this perf build warning:

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

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

Cc: David Hildenbrand (Arm) 
Cc: Muhammad Usama Anjum 
Signed-off-by: Arnaldo Carvalho de Melo

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

2026-07-22T00:00:09+00:00

To pick up the changes in:

  b588019e85f49069 ("rtnetlink: add RTEXT_FILTER_NAME_ONLY support")

That just rebuilds perf, silencing this build warning.

This addresses this perf build warning:

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

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

Cc: Eric Dumazet 
Signed-off-by: Arnaldo Carvalho de Melo

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

2026-07-22T00:00:09+00:00

To pick up the changes in:

  de9e2b3d88af3641 ("uapi: Provide DIV_ROUND_CLOSEST()")

That just rebuilds perf, silencing this build warning.

This addresses this perf build warning:

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

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

Cc: Cristian Ciocaltea 
Signed-off-by: Arnaldo Carvalho de Melo

tools/include: include stdint.h for SIZE_MAX in overflow.h

2026-07-02T02:02:56+00:00

tools/include/linux/overflow.h uses SIZE_MAX in its size helper functions.

Include stdint.h so tools users that include overflow.h without another
SIZE_MAX provider can build.

Link: https://lore.kernel.org/20260629022124.131894-3-chenyichong@uniontech.com
Signed-off-by: Yichong Chen 
Acked-by: Eugenio Pérez 
Cc: Jason Wang 
Cc: Lorenzo Stoakes 
Cc: "Michael S. Tsirkin" 
Cc: Mike Rapoport 
Cc: Paolo Abeni 
Cc: Xuan Zhuo 
Signed-off-by: Andrew Morton