Re: Patch "perf python: Disable -Wno-cast-function-type-mismatch if present on clang" has been added to the 6.11-stable tree

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On Mon, Oct 7, 2024 at 6:28 PM <gregkh@xxxxxxxxxxxxxxxxxxx> wrote:
>
>
> This is a note to let you know that I've just added the patch titled
>
>     perf python: Disable -Wno-cast-function-type-mismatch if present on clang
>
> to the 6.11-stable tree which can be found at:
>     http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
>
> The filename of the patch is:
>      perf-python-disable-wno-cast-function-type-mismatch-if-present-on-clang.patch
> and it can be found in the queue-6.11 subdirectory.
>
> If you, or anyone else, feels it should not be added to the stable tree,
> please let <stable@xxxxxxxxxxxxxxx> know about it.
>
>
> From 00dc514612fe98cfa117193b9df28f15e7c9db9c Mon Sep 17 00:00:00 2001
> From: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
> Date: Thu, 22 Aug 2024 14:13:49 -0300
> Subject: perf python: Disable -Wno-cast-function-type-mismatch if present on clang
>
> From: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
>
> commit 00dc514612fe98cfa117193b9df28f15e7c9db9c upstream.
>
> The -Wcast-function-type-mismatch option was introduced in clang 19 and
> its enabled by default, since we use -Werror, and python bindings do
> casts that are valid but trips this warning, disable it if present.
>
> Closes: https://lore.kernel.org/all/CA+icZUXoJ6BS3GMhJHV3aZWyb5Cz2haFneX0C5pUMUUhG-UVKQ@xxxxxxxxxxxxxx
> Reported-by: Sedat Dilek <sedat.dilek@xxxxxxxxx>
> Tested-by: Sedat Dilek <sedat.dilek@xxxxxxxxx>
> Cc: Ian Rogers <irogers@xxxxxxxxxx>
> Cc: Ingo Molnar <mingo@xxxxxxxxxx>
> Cc: Namhyung Kim <namhyung@xxxxxxxxxx>
> Cc: Nathan Chancellor <nathan@xxxxxxxxxx>
> Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
> Cc: stable@xxxxxxxxxxxxxxx # To allow building with the upcoming clang 19
> Link: https://lore.kernel.org/lkml/CA+icZUVtHn8X1Tb_Y__c-WswsO0K8U9uy3r2MzKXwTA5THtL7w@xxxxxxxxxxxxxx
> Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
> ---
>  tools/perf/util/setup.py |    2 ++
>  1 file changed, 2 insertions(+)
>
> --- a/tools/perf/util/setup.py
> +++ b/tools/perf/util/setup.py
> @@ -63,6 +63,8 @@ cflags = getenv('CFLAGS', '').split()
>  cflags += ['-fno-strict-aliasing', '-Wno-write-strings', '-Wno-unused-parameter', '-Wno-redundant-decls' ]
>  if cc_is_clang:
>      cflags += ["-Wno-unused-command-line-argument" ]
> +    if clang_has_option("-Wno-cast-function-type-mismatch"):
> +        cflags += ["-Wno-cast-function-type-mismatch" ]
>  else:
>      cflags += ['-Wno-cast-function-type' ]
>
>
>
> Patches currently in stable-queue which might be from acme@xxxxxxxxxx are
>
> queue-6.11/perf-hist-update-hist-symbol-when-updating-maps.patch
> queue-6.11/perf-callchain-fix-stitch-lbr-memory-leaks.patch
> queue-6.11/perf-python-disable-wno-cast-function-type-mismatch-if-present-on-clang.patch

You need both patches:

upstream 00dc514612fe98cfa117193b9df28f15e7c9db9c
perf python: Disable -Wno-cast-function-type-mismatch if present on clang
^^ You have only this one - sets only the warning flag

upstream b81162302001f41157f6e93654aaccc30e817e2a
perf python: Allow checking for the existence of warning
^^ Add this please to all stable trees affected, Thanks.

-sed@-

[1] https://lore.kernel.org/all/CA+icZUUfk6bMCo+JXUy=5g-4qt20rDNR3b=HC9Ln_47UozXEDQ@xxxxxxxxxxxxxx/





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