From: Tejun Heo <tj@kernel.org>
Date: Thu, 14 Mar 2013 02:47:40 +0000 (-0700)
Subject: workqueue: separate out pool_workqueue locking into pwq_lock
X-Git-Tag: omap-for-v3.10/dt-fixes-for-merge-window~125^2~37
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=794b18bc8a3f80445e1f85c9c87c74de9575c93a;p=pandora-kernel.git

workqueue: separate out pool_workqueue locking into pwq_lock

This patch continues locking cleanup from the previous patch.  It
breaks out pool_workqueue synchronization from workqueue_lock into a
new spinlock - pwq_lock.  The followings are protected by pwq_lock.

* workqueue->pwqs
* workqueue->saved_max_active

The conversion is straight-forward.  workqueue_lock usages which cover
the above two are converted to pwq_lock.  New locking label PW added
for things protected by pwq_lock and FR is updated to mean flush_mutex
+ pwq_lock + sched-RCU.

This patch shouldn't introduce any visible behavior changes.

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