memcg: get rid of kmem_cache_dup()
kmem_cache_dup() is only called from memcg_create_kmem_cache(). The latter, in fact, does nothing besides this, so let's fold kmem_cache_dup() into memcg_create_kmem_cache(). This patch also makes the memcg_cache_mutex private to memcg_create_kmem_cache(), because it is not used anywhere else. Signed-off-by: Vladimir Davydov <vdavydov@parallels.com> Cc: Michal Hocko <mhocko@suse.cz> Cc: Glauber Costa <glommer@gmail.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Balbir Singh <bsingharora@gmail.com> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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