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: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Mike Travis <travis@sgi.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/kernel/workqueue.c b/kernel/workqueue.c
index a35afdb..1f0c509 100644
--- a/kernel/workqueue.c
+++ b/kernel/workqueue.c
@@ -971,6 +971,8 @@
}
#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 @@
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 @@
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
}