From: Tejun Heo <tj@kernel.org>
Date: Wed, 12 Feb 2014 14:29:50 +0000 (-0500)
Subject: cgroup: make cgroup hold onto its kernfs_node
X-Git-Tag: v3.15-rc1~109^2~51
X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=6f30558f37bfbd428e3854c2c34b5c32117c8f7e;p=pandora-kernel.git

cgroup: make cgroup hold onto its kernfs_node

cgroup currently releases its kernfs_node when it gets removed.  While
not buggy, this makes cgroup->kn access rules complicated than
necessary and leads to things like get/put protection around
kernfs_remove() in cgroup_destroy_locked().  In addition, we want to
use kernfs_name/path() and friends but also want to be able to
determine a cgroup's name between removal and release.

This patch makes cgroup hold onto its kernfs_node until freed so that
cgroup->kn is always accessible.

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

Reading git-diff-tree failed