Hi Bixuan, On Tue, 14 Jul 2020 13:41:01 +0000 Bixuan Cui <cuibixuan@xxxxxxxxxx> wrote: > > Gcc report the following warning without CONFIG_MEMCG_KMEM: > > mm/percpu-internal.h:145:29: warning: ‘pcpu_chunk_type’ defined > but not used [-Wunused-function] > static enum pcpu_chunk_type pcpu_chunk_type(struct pcpu_chunk *chunk) > ^~~~~~~~~~~~~~~ > > Mark pcpu_chunk_type() as __maybe_unused to make it clear. Given that it is in a header file, it should probably just be "static inline" (which will also suppress the warning). As should pcpu_is_memcg_chunk() and pcpu_chunk_list(). Also, without them being inline, there will be a new copy for each file that mm/percpu-internal.h is included in. And that should be considered a fix for "mm: memcg/percpu: account percpu memory to memory cgroups". -- Cheers, Stephen Rothwell
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