Re: [kbuild-all] Re: [PATCH] kcov: add __no_sanitize_coverage to fix noinstr for all architectures

[Rong Chen]

On 5/26/21 6:29 AM, Marco Elver wrote:
> On Wed, 26 May 2021 at 00:23, kernel test robot <lkp@xxxxxxxxx> wrote:
> [...]
> > [auto build test WARNING on linux/master]
> > [also build test WARNING on kees/for-next/pstore linus/master v5.13-rc3 next-20210525]
> > [If your patch is applied to the wrong git tree, kindly drop us a note.
> > And when submitting patch, we suggest to use '--base' as documented in
> > https://git-scm.com/docs/git-format-patch]
> >
> > url:    https://github.com/0day-ci/linux/commits/Marco-Elver/kcov-add-__no_sanitize_coverage-to-fix-noinstr-for-all-architectures/20210526-020046
> > base:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git dd860052c99b1e088352bdd4fb7aef46f8d2ef47
> > config: s390-randconfig-r002-20210525 (attached as .config)
> > compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 99155e913e9bad5f7f8a247f8bb3a3ff3da74af1)
> ^^^ you're using a Clang pre-release, breakages are expected until
> Clang 13 is final.

Hi Marco,

I really appreciate for your comment, we'll update clang to the latest 
version.

Best Regards,
Rong Chen

> I think there was a thread about this at some point. I guess LKP has
> decided that testing Clang pre-releases is fair game? I guess it's
> useful, but this warning here needs to be ignored. It'll go away when
> you rebuild your pre-release Clang 13 from the latest LLVM main
> branch.
>
> [...]
> > > > arch/s390/kernel/nmi.c:182:6: warning: unknown sanitizer 'coverage' ignored [-Wunknown-sanitizers]
> >     void noinstr s390_handle_mcck(void)
> >          ^
> >     include/linux/compiler_types.h:213:35: note: expanded from macro 'noinstr'
> >             __no_kcsan __no_sanitize_address __no_sanitize_coverage
> >                                              ^
> >     include/linux/compiler-clang.h:49:59: note: expanded from macro '__no_sanitize_coverage'
> >     #define __no_sanitize_coverage __attribute__((no_sanitize("coverage")))
> >                                                               ^
> Clang 13 will support the attribute, but this is a pre-release Clang
> 13 -- so please ignore the report. FWIW, I tested my patch of course
> with a version of Clang 13 that supports the attribute. :-)
>
> Thanks,
> -- Marco
> _______________________________________________
> kbuild-all mailing list -- kbuild-all@xxxxxxxxxxxx
> To unsubscribe send an email to kbuild-all-leave@xxxxxxxxxxxx