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work_on_cpu: Use our own workqueue.

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Impact: remove potential clashes with generic kevent workqueue

Annoyingly, some places we want to use work_on_cpu are already in
workqueues.  As per Ingo's suggestion, we create a different workqueue
for work_on_cpu.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Mike Travis <travis@sgi.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Rusty Russell 2009-01-16 15:31:15 -08:00 committed by Ingo Molnar
parent 31ad908120
commit 8ccad40df8
1 changed files with 7 additions and 1 deletions
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8
kernel/workqueue.c
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@ -971,6 +971,8 @@ static int __devinit workqueue_cpu_callback(struct notifier_block *nfb,
}
#ifdef CONFIG_SMP
static struct workqueue_struct *work_on_cpu_wq __read_mostly;
struct work_for_cpu {
struct work_struct work;
long (*fn)(void *);
@ -1001,7 +1003,7 @@ long work_on_cpu(unsigned int cpu, long (*fn)(void *), void *arg)
INIT_WORK(&wfc.work, do_work_for_cpu);
wfc.fn = fn;
wfc.arg = arg;
schedule_work_on(cpu, &wfc.work);
queue_work_on(cpu, work_on_cpu_wq, &wfc.work);
flush_work(&wfc.work);
return wfc.ret;
@ -1019,4 +1021,8 @@ void __init init_workqueues(void)
hotcpu_notifier(workqueue_cpu_callback, 0);
keventd_wq = create_workqueue("events");
BUG_ON(!keventd_wq);
#ifdef CONFIG_SMP
work_on_cpu_wq = create_workqueue("work_on_cpu");
BUG_ON(!work_on_cpu_wq);
#endif
}