mm: slab: make slab iterator functions static
There is no external users of slab_start/next/stop(), so make them static. And the memory.kmem.slabinfo is deprecated, which outputs nothing now, so move memcg_slab_show() into mm/memcontrol.c and rename it to mem_cgroup_slab_show to be consistent with other function names. Link: https://lkml.kernel.org/r/20211109133359.32881-1-songmuchun@bytedance.comSigned-off-by: Muchun Song <songmuchun@bytedance.com> Reviewed-by: Vlastimil Babka <vbabka@suse.cz> Cc: Christoph Lameter <cl@linux.com> Cc: Pekka Enberg <penberg@kernel.org> Cc: David Rientjes <rientjes@google.com> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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