From: Tejun Heo <tj@kernel.org>
Date: Sun, 14 Apr 2013 18:36:58 +0000 (-0700)
Subject: cgroup: make hierarchy_id use cyclic idr
X-Git-Tag: omap-for-v3.11/fixes-for-merge-window~43^2~23
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=1a574231669f8c3065c83974e9557fcbbd94b8a6;p=pandora-kernel.git

cgroup: make hierarchy_id use cyclic idr

We want to be able to lookup a hierarchy from its id and cyclic
allocation is a whole lot simpler with idr.  Convert to idr and use
idr_alloc_cyclc().

Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Li Zefan <lizefan@huawei.com>
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