]> git.itanic.dy.fi Git - linux-stable/commit
tools headers: Update tools's copy of arm64/asm headers
authorNamhyung Kim <namhyung@kernel.org>
Tue, 21 Nov 2023 22:56:44 +0000 (14:56 -0800)
committerNamhyung Kim <namhyung@kernel.org>
Wed, 22 Nov 2023 18:57:47 +0000 (10:57 -0800)
commitfad8afdcc18ff72e1d90c558be364f26534b8a5b
treeedc53b8cd75de83eed0d72b8512272c74aa4f893
parentc23708f37652b74570409725e0bd70a81c275867
tools headers: Update tools's copy of arm64/asm headers

tldr; Just FYI, I'm carrying this on the perf tools tree.

Full explanation:

There used to be no copies, with tools/ code using kernel headers
directly. From time to time tools/perf/ broke due to legitimate kernel
hacking. At some point Linus complained about such direct usage. Then we
adopted the current model.

The way these headers are used in perf are not restricted to just
including them to compile something.

There are sometimes used in scripts that convert defines into string
tables, etc, so some change may break one of these scripts, or new MSRs
may use some different #define pattern, etc.

E.g.:

  $ ls -1 tools/perf/trace/beauty/*.sh | head -5
  tools/perf/trace/beauty/arch_errno_names.sh
  tools/perf/trace/beauty/drm_ioctl.sh
  tools/perf/trace/beauty/fadvise.sh
  tools/perf/trace/beauty/fsconfig.sh
  tools/perf/trace/beauty/fsmount.sh
  $
  $ tools/perf/trace/beauty/fadvise.sh
  static const char *fadvise_advices[] = {
        [0] = "NORMAL",
        [1] = "RANDOM",
        [2] = "SEQUENTIAL",
        [3] = "WILLNEED",
        [4] = "DONTNEED",
        [5] = "NOREUSE",
  };
  $

The tools/perf/check-headers.sh script, part of the tools/ build
process, points out changes in the original files.

So its important not to touch the copies in tools/ when doing changes in
the original kernel headers, that will be done later, when
check-headers.sh inform about the change to the perf tools hackers.

Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will@kernel.org>
Cc: linux-arm-kernel@lists.infradead.org
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Link: https://lore.kernel.org/r/20231121225650.390246-9-namhyung@kernel.org
tools/arch/arm64/include/asm/cputype.h
tools/arch/arm64/include/uapi/asm/kvm.h
tools/arch/arm64/include/uapi/asm/perf_regs.h