From: Zefan Li <lizefan@huawei.com>
Date: Sat, 20 Sep 2014 06:49:10 +0000 (+0800)
Subject: cgroup: remove redundant variable in cgroup_mount()
X-Git-Tag: fixes-against-v3.18-rc2~135^2~1
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=0c7bf3e8cab7900e17ce7f97104c39927d835469;p=pandora-kernel.git

cgroup: remove redundant variable in cgroup_mount()

Both pinned_sb and new_sb indicate if a new superblock is needed,
so we can just remove new_sb.

Note now we must check if kernfs_tryget_sb() returns NULL, because
when it returns NULL, kernfs_mount() may still re-use an existing
superblock, which is just allocated by another concurent mount.

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

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