Re: Build error kernel/cgroup/rstat.c on v6.7-1959-gaffc5af36bbb

[Thomas Voegtle]

On Wed, 10 Jan 2024, Arnd Bergmann wrote:

> On Wed, Jan 10, 2024, at 20:50, Thomas Voegtle wrote:
> > Hello,
> >
> > building v6.7-1959-gaffc5af36bbb I get this:
> >
> > ...
> >    CALL    scripts/checksyscalls.sh
> >    DESCEND objtool
> >    INSTALL libsubcmd_headers
> >    CC      kernel/cgroup/rstat.o
> > kernel/cgroup/rstat.c:218:22: error: no previous prototype for
> > ‘bpf_rstat_flush’ [-Werror=missing-prototypes]
> >   __weak noinline void bpf_rstat_flush(struct cgroup *cgrp,
> >                        ^~~~~~~~~~~~~~~
> >
> >
> > git bisects points to:
> >
> > commit 0fcb70851fbfea1776ae62f67c503fef8f0292b9 (refs/bisect/bad)
> > Author: Arnd Bergmann <arnd@xxxxxxxx>
> > Date:   Thu Nov 23 12:05:06 2023 +0100
> >
> >      Makefile.extrawarn: turn on missing-prototypes globally
> >
> >
> > My config is attached.
> > openSUSE Leap 15.5 x86_64 with gcc 7.5.0
> >
> >
> > Is this already known?
>
> There is a workaround in linux-next, see commit
> 15fb6f2b6c4c ("bpf: Add __bpf_hook_{start,end} macros")
>
> I assume this will be merged soon.

That commit is already merged?