From 9625ab1727743f6a164df26b7b1eeeced7380b42 Mon Sep 17 00:00:00 2001
From: Lai Jiangshan <laijs@cn.fujitsu.com>
Date: Tue, 20 May 2014 17:46:27 +0800
Subject: [PATCH] workqueue: use manager lock only to protect worker_idr

worker_idr is highly bound to managers and is always/only accessed in manager
lock context. So we don't need pool->lock for it.

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