From 2f0edc04e702fc07d29621f9e361b9120a7594d0 Mon Sep 17 00:00:00 2001
From: Jianyu Zhan <nasa4836@gmail.com>
Date: Fri, 25 Apr 2014 18:28:03 -0400
Subject: [PATCH] cgroup: clean up obsolete comment for
 parse_cgroupfs_options()

1d5be6b287c8efc87 ("cgroup: move module ref handling into
rebind_subsystems()") makes parse_cgroupfs_options() no longer takes
refcounts on subsystems.

And unified hierachy makes parse_cgroupfs_options not need to call
with cgroup_mutex held to protect the cgroup_subsys[].

So this patch removes BUG_ON() and the comment.  As the comment
doesn't contain useful information afterwards, the whole comment is
removed.

Signed-off-by: Jianyu Zhan <nasa4836@gmail.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
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