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workqueue: reuse the already calculated pwq in try_to_grab_pending()

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try_to_grab_pending() was re-calculating the associated pwq using
get_work_pwq() when it already has it cached in a local varible and
the association can't change.  Reuse the local variable instead.

This doesn't introduce any functional changes.

tj: Updated description.

Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
This commit is contained in:
Lai Jiangshan 2014-07-11 00:11:13 +08:00 committed by Tejun Heo
parent 85327af61d
commit 9c34a7042e
1 changed files with 1 additions and 1 deletions
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2
kernel/workqueue.c
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@ -1225,7 +1225,7 @@ static int try_to_grab_pending(struct work_struct *work, bool is_dwork,
pwq_activate_delayed_work(work);
list_del_init(&work->entry);
pwq_dec_nr_in_flight(get_work_pwq(work), get_work_color(work));
pwq_dec_nr_in_flight(pwq, get_work_color(work));
/* work->data points to pwq iff queued, point to pool */
set_work_pool_and_keep_pending(work, pool->id);