From 8cca0eea3964b72b14e8c3f88e3a40bef7b9113e Mon Sep 17 00:00:00 2001
From: Tejun Heo <tj@kernel.org>
Date: Tue, 29 Jun 2010 10:07:13 +0200
Subject: [PATCH] workqueue: add find_worker_executing_work() and track
 current_cwq

Now that all the workers are tracked by gcwq, we can find which worker
is executing a work from gcwq.  Implement find_worker_executing_work()
and make worker track its current_cwq so that we can find things the
other way around.  This will be used to implement non-reentrant wqs.

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