From d2c1d40487bb1884be085c187233084f80df052d Mon Sep 17 00:00:00 2001
From: Tejun Heo <tj@kernel.org>
Date: Tue, 12 Mar 2013 11:30:04 -0700
Subject: [PATCH] workqueue: restructure __alloc_workqueue_key()

* Move initialization and linking of pool_workqueues into
  init_and_link_pwq().

* Make the failure path use destroy_workqueue() once pool_workqueue
  initialization succeeds.

These changes are to prepare for dynamic management of pool_workqueues
and don't introduce any functional changes.

While at it, convert list_del(&wq->list) to list_del_init() as a
precaution as scheduled changes will make destruction more complex.

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