From: Tejun Heo <tj@kernel.org>
Date: Fri, 28 Jun 2013 23:24:11 +0000 (-0700)
Subject: cgroup: update error handling in cgroup_populate_dir()
X-Git-Tag: v3.12-rc1~173^2~65
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=bee550994f6b0c1179bd3ccea58dc5c2c4ccf842;p=pandora-kernel.git

cgroup: update error handling in cgroup_populate_dir()

cgroup_populate_dir() didn't use to check whether the actual file
creations were successful and could return success with only subset of
the requested files created, which is nasty.

This patch udpates cgroup_populate_dir() so that it either succeeds
with all files or fails with no file.

v2: The original patch also converted for_each_root_subsys() usages to
    for_each_subsys() without explaining why.  That part has been
    moved to a separate patch.

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

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