Re: [PATCH] Makefile.kcov: apply needed compiler option unconditionally in CFLAGS_KCOV

["Arnd Bergmann" <arnd@arndb.de>]

On Wed, May 21, 2025, at 12:02, Alexander Potapenko wrote:
> On Tue, May 20, 2025 at 4:57 PM 'Dmitry Vyukov' via kasan-dev
> <kasan-dev@googlegroups.com> wrote:
>>
>> On Thu, 8 May 2025 at 18:44, Nathan Chancellor <nathan@kernel.org> wrote:
>> >
>> > On Wed, May 07, 2025 at 03:30:43PM +0200, Lukas Bulwahn wrote:
>> > > From: Lukas Bulwahn <lukas.bulwahn@redhat.com>
>> > >
>> > > Commit 852faf805539 ("gcc-plugins: remove SANCOV gcc plugin") removes the
>> > > config CC_HAS_SANCOV_TRACE_PC, as all supported compilers include the
>> > > compiler option '-fsanitize-coverage=trace-pc' by now.
>> > >
>> > > The commit however misses the important use of this config option in
>> > > Makefile.kcov to add '-fsanitize-coverage=trace-pc' to CFLAGS_KCOV.
>> > > Include the compiler option '-fsanitize-coverage=trace-pc' unconditionally
>> > > to CFLAGS_KCOV, as all compilers provide that option now.
>> > >
>> > > Fixes: 852faf805539 ("gcc-plugins: remove SANCOV gcc plugin")
>> > > Signed-off-by: Lukas Bulwahn <lukas.bulwahn@redhat.com>
>> >
>> > Good catch.
>> >
>> > Reviewed-by: Nathan Chancellor <nathan@kernel.org>
>>
>> Reviewed-by: Dmitry Vyukov <dvyukov@google.com>
>>
>> Thanks for fixing this!
>
> @akpm, could you please take this patch at your convenience?

I have applied it on the asm-generic tree now, as this contains
the original broken commit. Sorry for missing it earlier.

      Arnd