Re: linux-next: build failure after merge of the tip tree

[Jiri Slaby]

On 17. 03. 25, 6:05, Stephen Rothwell wrote:
> Hi all,
>
> On Tue, 11 Mar 2025 15:24:29 +1100 Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx> wrote:
> > On Thu, 6 Mar 2025 15:25:16 +1100 Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx> wrote:
> > > On Tue, 4 Mar 2025 16:25:31 +1100 Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx> wrote:
> > > > After merging the tip tree, today's linux-next build (x86_64 allmodconfig)
> > > > failed like this:
> > > >
> > > > In file included from include/asm-generic/percpu.h:7,
> > > >                   from arch/x86/include/asm/percpu.h:597,
> > > >                   from arch/x86/include/asm/preempt.h:6,
> > > >                   from include/linux/preempt.h:79,
> > > >                   from include/linux/spinlock.h:56,
> > > >                   from include/linux/wait.h:9,
> > > >                   from include/linux/wait_bit.h:8,
> > > >                   from include/linux/fs.h:7,
> > > >                   from kernel/events/core.c:11:
> > > > kernel/events/core.c: In function 'this_cpc':
> > > > include/linux/percpu-defs.h:220:45: error: initialization from pointer to non-enclosed address space
> > > >    220 |         const void __percpu *__vpp_verify = (typeof((ptr) + 0))NULL;    \
> > > >        |                                             ^
> > > > include/linux/percpu-defs.h:251:9: note: in expansion of macro '__verify_pcpu_ptr'
> > > >    251 |         __verify_pcpu_ptr(ptr);                                         \
> > > >        |         ^~~~~~~~~~~~~~~~~
> > > > kernel/events/core.c:1222:17: note: in expansion of macro 'this_cpu_ptr'
> > > >   1222 |         return *this_cpu_ptr(pmu->cpu_pmu_context);
> > > >        |                 ^~~~~~~~~~~~
> > > >
> > > > (and many more similar)
> > > >
> > > > Presumably caused by commit
> > > >
> > > >    f67d1ffd841f ("perf/core: Detach 'struct perf_cpu_pmu_context' and 'struct pmu' lifetimes")
> > > >
> > > > I have used the tip tree from next-20250303 for today.
> > >
> > > I am still seeing this build failure.
> >
> > Ditto.  Anything happening with this?
> >
> > I am still using the tip tree from next-20250303.
>
> So am I missing something here?  I am still seeing this build failure.
>
> That commit is now
>
>    4eabf533fb18 ("perf/core: Detach 'struct perf_cpu_pmu_context' and 'struct pmu' lifetimes")
>
> Is there something in my toolchain?   Or some other difference in our
> build environments?

FWIW I cannot reproduce with gcc 14 or 9. tip/master builds that file 
fine for me. Perhaps a merge with some other tree introduces this?

thanks,
--
js
suse labs