From: Tejun Heo <tj@kernel.org>
Date: Wed, 13 May 2015 20:35:18 +0000 (-0400)
Subject: cgroup: simplify threadgroup locking
X-Git-Tag: omap-for-v4.3/legacy-v2-signed~116^2~9
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b5ba75b5fc0e8404e2c50cb68f39bb6a53fc916f;p=pandora-kernel.git

cgroup: simplify threadgroup locking

Now that threadgroup locking is made global, code paths around it can
be simplified.

* lock-verify-unlock-retry dancing removed from __cgroup_procs_write().

* Race protection against de_thread() removed from
  cgroup_update_dfl_csses().

Signed-off-by: Tejun Heo <tj@kernel.org>
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