From: Tejun Heo <tj@kernel.org>
Date: Wed, 13 Mar 2013 23:51:35 +0000 (-0700)
Subject: workqueue: implement and use pwq_adjust_max_active()
X-Git-Tag: omap-for-v3.10/dt-fixes-for-merge-window~125^2~47
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=699ce097efe8f45bc5c055e4f12cb1e271c270d9;p=pandora-kernel.git

workqueue: implement and use pwq_adjust_max_active()

Rename pwq_set_max_active() to pwq_adjust_max_active() and move
pool_workqueue->max_active synchronization and max_active
determination logic into it.

The new function should be called with workqueue_lock held for stable
workqueue->saved_max_active, determines the current max_active value
the target pool_workqueue should be using from @wq->saved_max_active
and the state of the associated pool, and applies it with proper
synchronization.

The current two users - workqueue_set_max_active() and
thaw_workqueues() - are updated accordingly.  In addition, the manual
freezing handling in __alloc_workqueue_key() and
freeze_workqueues_begin() are replaced with calls to
pwq_adjust_max_active().

This centralizes max_active handling so that it's less error-prone.

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