On Thu, Jan 19, 2012 at 12:51:47PM -0800, Hugh Dickins wrote:

Remove lock and unlock around css_get_next()'s call to idr_get_next().
memcg iterators (only users of css_get_next) already did rcu_read_lock(),
and its comment demands that; but add a WARN_ON_ONCE to make sure of it.

Signed-off-by: Hugh Dickins <redacted>
Acked-by: KAMEZAWA Hiroyuki <redacted>
Acked-by: Li Zefan <redacted>

All three look good to me,

 Acked-by: Tejun Heo [off-list ref]

Thanks.

-- 
tejun