From 7c918cbbd829669bf70ffcc45962d5d992942243 Mon Sep 17 00:00:00 2001
From: Tejun Heo <tj@kernel.org>
Date: Mon, 26 Aug 2013 18:40:56 -0400
Subject: [PATCH] cgroup: make cgroup_write_event_control() use css_from_dir()
 instead of __d_cgrp()

cgroup_event will be moved to its only user - memcg.  Replace
__d_cgrp() usage with css_from_dir(), which is already exported.  This
also simplifies the code a bit.

Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Li Zefan <lizefan@huawei.com>
Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
---
Reading git-format-patch failed