linux.git/tools/include/linux, branch v6.6.132

tools: Fix bitfield dependency failure

2026-03-04T12:21:13+00:00

[ Upstream commit a537c0da168a08b0b6a7f7bd9e75f4cc8d45ff57 ]

A perf build failure was reported by Thomas Voegtle on stable kernel
v6.6.120:

    CC      tests/sample-parsing.o
    CC      util/intel-pt-decoder/intel-pt-pkt-decoder.o
    CC      util/perf-regs-arch/perf_regs_csky.o
    CC      util/arm-spe-decoder/arm-spe-pkt-decoder.o
    CC      util/perf-regs-arch/perf_regs_loongarch.o
  In file included from util/arm-spe-decoder/arm-spe-pkt-decoder.h:10,
                   from util/arm-spe-decoder/arm-spe-pkt-decoder.c:14:
  /local/git/linux-stable-rc/tools/include/linux/bitfield.h: In function ‘le16_encode_bits’:
  /local/git/linux-stable-rc/tools/include/linux/bitfield.h:166:31: error: implicit declaration of
  function ‘cpu_to_le16’; did you mean ‘htole16’? [-Werror=implicit-function-declaration]
    ____MAKE_OP(le##size,u##size,cpu_to_le##size,le##size##_to_cpu) \
                                 ^~~~~~~~~
  /local/git/linux-stable-rc/tools/include/linux/bitfield.h:149:9: note: in definition of macro
  ‘____MAKE_OP’
    return to((v & field_mask(field)) * field_multiplier(field)); \
           ^~
  /local/git/linux-stable-rc/tools/include/linux/bitfield.h:170:1: note: in expansion of macro
  ‘__MAKE_OP’
   __MAKE_OP(16)

Fix this by including linux/kernel.h, which provides the required
definitions.

The issue was not found on the mainline due to the relevant C files have
included kernel.h.  It'd be good to merge this change on mainline
as well for robustness.

Closes: https://lore.kernel.org/stable/3a44500b-d7c8-179f-61f6-e51cb50d3512@lio96.de/
Fixes: 64d86c03e1441742 ("perf arm-spe: Extend branch operations")
Reported-by: Hamza Mahfooz 
Reported-by: Thomas Voegtle 
Signed-off-by: Leo Yan 
Cc: Greg Kroah-Hartman 
Cc: Ian Rogers 
Cc: James Clark 
Cc: Leo Yan 
Cc: Namhyung Kim 
To: Sasha Levin 
Cc: stable@vger.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo 
Signed-off-by: Sasha Levin

tools bitmap: Add missing asm-generic/bitsperlong.h include

2025-11-24T09:29:49+00:00

[ Upstream commit f38ce0209ab4553906b44bd1159e35c740a84161 ]

small_const_nbits is defined in asm-generic/bitsperlong.h which
bitmap.h uses but doesn't include causing build failures in some build
systems. Add the missing #include.

Note the bitmap.h in tools has diverged from that of the kernel, so no
changes are made there.

Signed-off-by: Ian Rogers 
Acked-by: Yury Norov 
Cc: Adrian Hunter 
Cc: Alexander Shishkin 
Cc: André Almeida 
Cc: Daniel Borkmann 
Cc: Darren Hart 
Cc: David S. Miller 
Cc: Davidlohr Bueso 
Cc: Ido Schimmel 
Cc: Ingo Molnar 
Cc: Jakub Kicinski 
Cc: Jamal Hadi Salim 
Cc: Jason Xing 
Cc: Jiri Olsa 
Cc: Jonas Gottlieb 
Cc: Kan Liang 
Cc: Mark Rutland 
Cc: Maurice Lambert 
Cc: Namhyung Kim 
Cc: Paolo Abeni 
Cc: Peter Zijlstra 
Cc: Petr Machata 
Cc: Rasmus Villemoes 
Cc: Thomas Gleixner 
Cc: Yuyang Huang 
Signed-off-by: Arnaldo Carvalho de Melo 
Signed-off-by: Sasha Levin

kallsyms: fix build without execinfo

2025-07-17T16:35:14+00:00

commit a95743b53031b015e8949e845a9f6fdfb2656347 upstream.

Some libc's like musl libc don't provide execinfo.h since it's not part of
POSIX.  In order to fix compilation on musl, only include execinfo.h if
available (HAVE_BACKTRACE_SUPPORT)

This was discovered with c104c16073b7 ("Kunit to check the longest symbol
length") which starts to include linux/kallsyms.h with Alpine Linux'
configs.

Link: https://lkml.kernel.org/r/20250622014608.448718-1-fossdd@pwned.life
Fixes: c104c16073b7 ("Kunit to check the longest symbol length")
Signed-off-by: Achill Gilgenast 
Cc: Luis Henriques 
Cc: Greg Kroah-Hartman 
Cc: 
Signed-off-by: Andrew Morton 
Signed-off-by: Greg Kroah-Hartman

memblock tests: fix implicit declaration of function 'numa_valid_node'

2025-01-17T12:36:14+00:00

commit 9364a7e40d54e6858479f0a96e1a04aa1204be16 upstream.

commit 8043832e2a12 ("memblock: use numa_valid_node() helper to check
for invalid node ID") introduce a new helper numa_valid_node(), which is
not defined in memblock tests.

Let's add it in the corresponding header file.

Signed-off-by: Wei Yang 
CC: Mike Rapoport (IBM) 
Link: https://lore.kernel.org/r/20240624015432.31134-1-richard.weiyang@gmail.com
Signed-off-by: Mike Rapoport 
Signed-off-by: Greg Kroah-Hartman

tools: move alignment-related macros to new

2024-08-29T15:33:59+00:00

commit 10a04ff09bcc39e0044190ffe9f00f998f13647c upstream.

Currently, tools have *ALIGN*() macros scattered across the unrelated
headers, as there are only 3 of them and they were added separately
each time on an as-needed basis.
Anyway, let's make it more consistent with the kernel headers and allow
using those macros outside of the mentioned headers. Create
 inside the tools/ folder and include it where needed.

Signed-off-by: Yury Norov 
Signed-off-by: Alexander Lobakin 
Signed-off-by: David S. Miller 
Signed-off-by: Greg Kroah-Hartman

bitmap: introduce generic optimized bitmap_size()

2024-08-29T15:33:14+00:00

commit a37fbe666c016fd89e4460d0ebfcea05baba46dc upstream.

The number of times yet another open coded
`BITS_TO_LONGS(nbits) * sizeof(long)` can be spotted is huge.
Some generic helper is long overdue.

Add one, bitmap_size(), but with one detail.
BITS_TO_LONGS() uses DIV_ROUND_UP(). The latter works well when both
divident and divisor are compile-time constants or when the divisor
is not a pow-of-2. When it is however, the compilers sometimes tend
to generate suboptimal code (GCC 13):

48 83 c0 3f          	add    $0x3f,%rax
48 c1 e8 06          	shr    $0x6,%rax
48 8d 14 c5 00 00 00 00	lea    0x0(,%rax,8),%rdx

%BITS_PER_LONG is always a pow-2 (either 32 or 64), but GCC still does
full division of `nbits + 63` by it and then multiplication by 8.
Instead of BITS_TO_LONGS(), use ALIGN() and then divide by 8. GCC:

8d 50 3f             	lea    0x3f(%rax),%edx
c1 ea 03             	shr    $0x3,%edx
81 e2 f8 ff ff 1f    	and    $0x1ffffff8,%edx

Now it shifts `nbits + 63` by 3 positions (IOW performs fast division
by 8) and then masks bits[2:0]. bloat-o-meter:

add/remove: 0/0 grow/shrink: 20/133 up/down: 156/-773 (-617)

Clang does it better and generates the same code before/after starting
from -O1, except that with the ALIGN() approach it uses %edx and thus
still saves some bytes:

add/remove: 0/0 grow/shrink: 9/133 up/down: 18/-538 (-520)

Note that we can't expand DIV_ROUND_UP() by adding a check and using
this approach there, as it's used in array declarations where
expressions are not allowed.
Add this helper to tools/ as well.

Reviewed-by: Przemek Kitszel 
Acked-by: Yury Norov 
Signed-off-by: Alexander Lobakin 
Signed-off-by: David S. Miller 
Signed-off-by: Greg Kroah-Hartman

memblock tests: fix undefined reference to `panic'

2024-05-17T10:02:14+00:00

[ Upstream commit e0f5a8e74be88f2476e58b25d3b49a9521bdc4ec ]

commit e96c6b8f212a ("memblock: report failures when memblock_can_resize
is not set") introduced the usage of panic, which is not defined in
memblock test.

Let's define it directly in panic.h to fix it.

Signed-off-by: Wei Yang 
CC: Song Shuai 
CC: Mike Rapoport 
Link: https://lore.kernel.org/r/20240402132701.29744-3-richard.weiyang@gmail.com
Signed-off-by: Mike Rapoport (IBM) 
Signed-off-by: Sasha Levin

memblock tests: fix undefined reference to `early_pfn_to_nid'

2024-05-17T10:02:14+00:00

[ Upstream commit 7d8ed162e6a92268d4b2b84d364a931216102c8e ]

commit 6a9531c3a880 ("memblock: fix crash when reserved memory is not
added to memory") introduce the usage of early_pfn_to_nid, which is not
defined in memblock tests.

The original definition of early_pfn_to_nid is defined in mm.h, so let
add this in the corresponding mm.h.

Signed-off-by: Wei Yang 
CC: Yajun Deng 
CC: Mike Rapoport 
Link: https://lore.kernel.org/r/20240402132701.29744-2-richard.weiyang@gmail.com
Signed-off-by: Mike Rapoport (IBM) 
Signed-off-by: Sasha Levin

tools/resolve_btfids: fix build with musl libc

2024-04-03T13:29:03+00:00

commit 62248b22d01e96a4d669cde0d7005bd51ebf9e76 upstream.

Include the header that defines u32.
This fixes build of 6.6.23 and 6.1.83 kernels for Alpine Linux, which
uses musl libc. I assume that GNU libc indirecly pulls in linux/types.h.

Fixes: 9707ac4fe2f5 ("tools/resolve_btfids: Refactor set sorting with types from btf_ids.h")
Closes: https://bugzilla.kernel.org/show_bug.cgi?id=218647
Cc: stable@vger.kernel.org
Signed-off-by: Natanael Copa 
Tested-by: Greg Thelen 
Link: https://lore.kernel.org/r/20240328110103.28734-1-ncopa@alpinelinux.org
Signed-off-by: Alexei Starovoitov 
Signed-off-by: Greg Kroah-Hartman

tools/resolve_btfids: Refactor set sorting with types from btf_ids.h

2024-03-26T22:19:27+00:00

[ Upstream commit 9707ac4fe2f5bac6406d2403f8b8a64d7b3d8e43 ]

Instead of using magic offsets to access BTF ID set data, leverage types
from btf_ids.h (btf_id_set and btf_id_set8) which define the actual
layout of the data. Thanks to this change, set sorting should also
continue working if the layout changes.

This requires to sync the definition of 'struct btf_id_set8' from
include/linux/btf_ids.h to tools/include/linux/btf_ids.h. We don't sync
the rest of the file at the moment, b/c that would require to also sync
multiple dependent headers and we don't need any other defs from
btf_ids.h.

Signed-off-by: Viktor Malik 
Signed-off-by: Andrii Nakryiko 
Acked-by: Daniel Xu 
Link: https://lore.kernel.org/bpf/ff7f062ddf6a00815fda3087957c4ce667f50532.1707223196.git.vmalik@redhat.com
Stable-dep-of: 903fad439466 ("tools/resolve_btfids: Fix cross-compilation to non-host endianness")
Signed-off-by: Sasha Levin