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由 Michal Hocko 提交于
We are checking whether a given two groups are same or at least in the same subtree of a hierarchy at several places. Let's make a helper for it to make code easier to read. Signed-off-by: NMichal Hocko <mhocko@suse.cz> Acked-by: NKAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: Balbir Singh <bsingharora@gmail.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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