Hi Linus,
On Tue, 30 Jul 2024 08:22:04 +1000 Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx> wrote:
>
> After merging the origin tree, today's linux-next build (powerpc
> ppc64_defconfig) produced these warnings:
>
> In file included from include/asm-generic/percpu.h:7,
> from arch/powerpc/include/asm/percpu.h:28,
> from include/linux/irqflags.h:19,
> from include/linux/spinlock.h:59,
> from include/linux/mmzone.h:8,
> from include/linux/gfp.h:7,
> from include/linux/mm.h:7,
> from include/linux/memblock.h:12,
> from kernel/profile.c:20:
> kernel/profile.c:52:28: warning: 'cpu_profile_flip' defined but not used [-Wunused-variable]
> 52 | static DEFINE_PER_CPU(int, cpu_profile_flip);
> | ^~~~~~~~~~~~~~~~
> include/linux/percpu-defs.h:104:44: note: in definition of macro 'DEFINE_PER_CPU_SECTION'
> 104 | __PCPU_ATTRS(sec) __typeof__(type) name
> | ^~~~
> kernel/profile.c:52:8: note: in expansion of macro 'DEFINE_PER_CPU'
> 52 | static DEFINE_PER_CPU(int, cpu_profile_flip);
> | ^~~~~~~~~~~~~~
> kernel/profile.c:51:48: warning: 'cpu_profile_hits' defined but not used [-Wunused-variable]
> 51 | static DEFINE_PER_CPU(struct profile_hit *[2], cpu_profile_hits);
> | ^~~~~~~~~~~~~~~~
> include/linux/percpu-defs.h:104:44: note: in definition of macro 'DEFINE_PER_CPU_SECTION'
> 104 | __PCPU_ATTRS(sec) __typeof__(type) name
> | ^~~~
> kernel/profile.c:51:8: note: in expansion of macro 'DEFINE_PER_CPU'
> 51 | static DEFINE_PER_CPU(struct profile_hit *[2], cpu_profile_hits);
> | ^~~~~~~~~~~~~~
>
> Introduced by commit
>
> 2accfdb7eff6 ("profiling: attempt to remove per-cpu profile flip buffer")
I also did not understand why my arm and x86_64 builds did not get
these warnings, but my i386 defconig build (that I only do at the end
of my merging) actually failed, so I remerged your tree with the fix in
it.
--
Cheers,
Stephen Rothwell
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