[PATCH v2 -mmotm 2/4] cgroups: remove events before destroying subsystem state objects

[Li Zefan]

Kirill A. Shutemov wrote:
> Events should be removed after rmdir of cgroup directory, but before
> destroying subsystem state objects. Let's take reference to cgroup
> directory dentry to do that.
> 
> Signed-off-by: Kirill A. Shutemov <kirill at shutemov.name>
> Acked-by: KAMEZAWA Hiroyuki <kamezawa.hioryu at jp.fujitsu.com>

Looks good.

Acked-by: Li Zefan <lizf at cn.fujitsu.com>