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authorHugh Dickins <hughd@google.com>2012-03-22 00:34:20 +0100
committerLinus Torvalds <torvalds@linux-foundation.org>2012-03-22 01:55:01 +0100
commit9f7de8275b46d9d11b1505adbfe6c2bb48df4741 (patch)
tree7495111b20585e6e4da20d1b46b7a3747903ce2a /Documentation/auxdisplay
parentmemcg: remove unnecessary thp check in page stat accounting (diff)
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idr: make idr_get_next() good for rcu_read_lock()
Make one small adjustment to idr_get_next(): take the height from the top layer (stable under RCU) instead of from the root (unprotected by RCU), as idr_find() does: so that it can be used with RCU locking. Copied comment on RCU locking from idr_find(). Signed-off-by: Hugh Dickins <hughd@google.com> Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Acked-by: Li Zefan <lizf@cn.fujitsu.com> Cc: Eric Dumazet <eric.dumazet@gmail.com> Acked-by: Tejun Heo <tj@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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