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workqueue: sanity check pool->cpu in wq_worker_sleeping()

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In theory, pool->cpu is equals to @cpu in wq_worker_sleeping() after
worker->flags is checked.

And "pool->cpu != cpu" sanity check will help us if something wrong.

Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
This commit is contained in:
Lai Jiangshan 2014-06-03 15:33:08 +08:00 committed by Tejun Heo
parent b62c075194
commit 92b69f5091
1 changed files with 1 additions and 1 deletions
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2
kernel/workqueue.c
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@ -843,7 +843,7 @@ struct task_struct *wq_worker_sleeping(struct task_struct *task, int cpu)
pool = worker->pool;
/* this can only happen on the local cpu */
if (WARN_ON_ONCE(cpu != raw_smp_processor_id()))
if (WARN_ON_ONCE(cpu != raw_smp_processor_id() || pool->cpu != cpu))
return NULL;
/*