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workqueue: correct req_cpu in trace_workqueue_queue_work()

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When we do tracing workqueue_queue_work(), it records requested cpu.
But, if !(@wq->flag & WQ_UNBOUND) and @cpu is WORK_CPU_UNBOUND,
requested cpu is changed as local cpu.
In case of @wq->flag & WQ_UNBOUND, above change is not occured,
therefore it is reasonable to correct it.

Use temporary local variable for storing requested cpu.

Signed-off-by: Joonsoo Kim <js1304@gmail.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
This commit is contained in:
Joonsoo Kim 2012-08-15 23:25:37 +09:00 committed by Tejun Heo
parent 330dad5b9c
commit b75cac9368
1 changed files with 2 additions and 1 deletions
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3
kernel/workqueue.c
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@ -1198,6 +1198,7 @@ static void __queue_work(unsigned int cpu, struct workqueue_struct *wq,
struct cpu_workqueue_struct *cwq;
struct list_head *worklist;
unsigned int work_flags;
unsigned int req_cpu = cpu;
/*
* While a work item is PENDING && off queue, a task trying to
@ -1253,7 +1254,7 @@ static void __queue_work(unsigned int cpu, struct workqueue_struct *wq,
/* gcwq determined, get cwq and queue */
cwq = get_cwq(gcwq->cpu, wq);
trace_workqueue_queue_work(cpu, cwq, work);
trace_workqueue_queue_work(req_cpu, cwq, work);
if (WARN_ON(!list_empty(&work->entry))) {
spin_unlock(&gcwq->lock);