memcgroup: return negative error code in mem_cgroup_create()
Cgroup requires the subsystem to return negative error code on error in the create method. Signed-off-by: NLi Zefan <lizf@cn.fujitsu.com> Acked-by: NKAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Acked-by: NBalbir Singh <balbir@in.ibm.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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