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Commit 8ccad40d authored by Rusty Russell's avatar Rusty Russell Committed by Ingo Molnar
Browse files

work_on_cpu: Use our own workqueue. 



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: default avatarRusty Russell <rusty@rustcorp.com.au>
Signed-off-by: default avatarMike Travis <travis@sgi.com>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent 31ad9081

kernel/workqueue.c

+7 −1
Original line number Diff line number Diff line
@@ -971,6 +971,8 @@ undo: 
}



#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

}