From ce9b499c9f58d7f3f680413f3ab5407f4e647ba2 Mon Sep 17 00:00:00 2001
From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Date: Mon, 13 Jan 2014 13:50:31 -0800
Subject: [PATCH] Revert "kernfs: remove unnecessary NULL check in
 __kernfs_remove()"

This reverts commit 88533f990c616cf50c2fe585ea03f75c806a293d.

Tejun writes:
        I'm sorry but can you please revert the whole series?
        get_active() waiting while a node is deactivated has potential
        to lead to deadlock and that deactivate/reactivate interface is
        something fundamentally flawed and that cgroup will have to work
        with the remove_self() like everybody else.  IOW, I think the
        first posting was correct.

Cc: Tejun Heo <tj@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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