Re: [PATCH] smp: fix smp_call_function_single_async prototype

[Arnd Bergmann <arnd@kernel.org>]

On Thu, Apr 29, 2021 at 8:24 PM 'Nick Desaulniers' via Clang Built
Linux <clang-built-linux@googlegroups.com> wrote:
>
> On Thu, Apr 29, 2021 at 11:17 AM Nick Desaulniers
> <ndesaulniers@google.com> wrote:
> >
> > (replying manually to
> > https://lore.kernel.org/lkml/20210429150940.3256656-1-arnd@kernel.org/)
> >
> > Thanks for the patch; with this applied I observe the following new warnings
> > though (for x86_64 defconfig; make LLVM=1 LLVM_IAS=1 -j72)
> >
> > kernel/smp.c:515:19: warning: passing 8-byte aligned argument to 32-byte
> > aligned parameter 1 of 'csd_lock_record' may result in an unaligned pointer
> > access [-Walign-mismatch]
> >                 csd_lock_record(csd);
> >                                 ^
> > kernel/smp.c:516:14: warning: passing 8-byte aligned argument to 32-byte
> > aligned parameter 1 of 'csd_unlock' may result in an unaligned pointer access
> > [-Walign-mismatch]
> >                 csd_unlock(csd);
> >                            ^
> > kernel/smp.c:525:14: warning: passing 8-byte aligned argument to 32-byte
> > aligned parameter 1 of 'csd_unlock' may result in an unaligned pointer access
> > [-Walign-mismatch]
> >                 csd_unlock(csd);
> >                            ^
>
> Perhaps roll this into a v2?
>

Right, I just did the same thing. I wonder if I failed to hit those because of
differences in configuration or because I tested the wrong way.

Either way, I'll give it some more time on the randconfig build machine
before I send out v2.

       Arnd