From: Tejun Heo <tj@kernel.org>
Date: Sun, 14 Apr 2013 17:32:19 +0000 (-0700)
Subject: cgroup: make cgroup_path() not print double slashes
X-Git-Tag: omap-for-v3.10/dt-fixes-for-merge-window~124^2~12
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=da1f296fd2bfd5ad3c53d72a1ece593e821cf374;p=pandora-kernel.git

cgroup: make cgroup_path() not print double slashes

While reimplementing cgroup_path(), 65dff759d2 ("cgroup: fix
cgroup_path() vs rename() race") introduced a bug where the path of a
non-root cgroup would have two slahses at the beginning, which is
caused by treating the root cgroup which has the name '/' like
non-root cgroups.

 $ grep systemd /proc/self/cgroup
 1:name=systemd://user/root/1

Fix it by special casing root cgroup case and not looping over it in
the normal path.

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