From: Tejun Heo <tj@kernel.org>
Date: Tue, 25 Feb 2014 15:04:03 +0000 (-0500)
Subject: cgroup: drop task_lock() protection around task->cgroups
X-Git-Tag: v3.15-rc1~109^2~18
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=0e1d768f1b1873272ec4e8dc1482bb5281855017;p=pandora-kernel.git

cgroup: drop task_lock() protection around task->cgroups

For optimization, task_lock() is additionally used to protect
task->cgroups.  The optimization is pretty dubious as either
css_set_rwsem is grabbed anyway or PF_EXITING already protects
task->cgroups.  It adds only overhead and confusion at this point.
Let's drop task_[un]lock() and update comments accordingly.

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

Reading git-diff-tree failed