From: Lai Jiangshan <laijs@cn.fujitsu.com>
Date: Mon, 25 Mar 2013 23:57:19 +0000 (-0700)
Subject: workqueue: protect wq->saved_max_active with wq->mutex
X-Git-Tag: omap-for-v3.10/dt-fixes-for-merge-window~125^2~21
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a357fc03262988f2aa6c4a668b89be22b11ff1e7;p=pandora-kernel.git

workqueue: protect wq->saved_max_active with wq->mutex

We're expanding wq->mutex to cover all fields specific to each
workqueue with the end goal of replacing pwq_lock which will make
locking simpler and easier to understand.

This patch makes wq->saved_max_active protected by wq->mutex instead
of pwq_lock.  As pwq_lock locking around pwq_adjust_mac_active() is no
longer necessary, this patch also replaces pwq_lock lockings of
for_each_pwq() around pwq_adjust_max_active() to wq->mutex.

tj: Rebased on top of the current dev branch.  Updated description.

Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
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