From: Tejun Heo <tj@kernel.org>
Date: Tue, 12 Mar 2013 18:29:59 +0000 (-0700)
Subject: workqueue: remove workqueue_struct->pool_wq.single
X-Git-Tag: omap-for-v3.10/dt-fixes-for-merge-window~125^2~71
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=420c0ddb1f205a3511b766d0dfee2cc87ed9dae0;p=pandora-kernel.git

workqueue: remove workqueue_struct->pool_wq.single

workqueue->pool_wq union is used to point either to percpu pwqs
(pool_workqueues) or single unbound pwq.  As the first pwq can be
accessed via workqueue->pwqs list, there's no reason for the single
pointer anymore.

Use list_first_entry(workqueue->pwqs) to access the unbound pwq and
drop workqueue->pool_wq.single pointer and the pool_wq union.  It
simplifies the code and eases implementing multiple unbound pools w/
custom attributes.

This patch doesn't introduce any visible behavior changes.

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