[PATCH 6/6] workqueue: remove pwq_lock which is no longer used

From: Lai Jiangshan To simplify locking, the previous patches expanded wq->mutex to protect all fields of each workqueue instance including the pwqs list leaving pwq_lock without any user. Remove the unused pwq_lock. tj: Rebased on top of the current dev branch. Updated description.

[PATCH 6/6] workqueue: remove pwq_lock which is no longer used

From: Lai Jiangshan la...@cn.fujitsu.com To simplify locking, the previous patches expanded wq-mutex to protect all fields of each workqueue instance including the pwqs list leaving pwq_lock without any user. Remove the unused pwq_lock. tj: Rebased on top of the current dev branch. Updated