[RFC][PATCH] PM / Runtime: Use alloc_workqueue() for creating PM workqueue

["Rafael J. Wysocki" <rjw@sisk.pl>]

From: Rafael J. Wysocki <rjw@sisk.pl>
Subject: PM / Runtime: Use alloc_workqueue() for creating PM workqueue

Although we need the PM workqueue to be freezable, we don't need it
to be singlethread.  Also, the number of concurrent work items
running on a single CPU need not be constrained.  For these reasons
use alloc_workqueue() directly, with suitable arguments, instead of
create_freezeable_workqueue(), to create the runtime PM workqueue.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
---

Tejun,

I'm not sure about that WQ_RESCUER thing.  Can you please tell me what
exactly it is for?

Thanks,
Rafael

---
 kernel/power/main.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Index: linux-2.6/kernel/power/main.c
===================================================================
--- linux-2.6.orig/kernel/power/main.c
+++ linux-2.6/kernel/power/main.c
@@ -308,7 +308,7 @@ EXPORT_SYMBOL_GPL(pm_wq);
 
 static int __init pm_start_workqueue(void)
 {
-	pm_wq = create_freezeable_workqueue("pm");
+	pm_wq = alloc_workqueue("pm", WQ_FREEZEABLE | WQ_RESCUER, 0);
 
 	return pm_wq ? 0 : -ENOMEM;
 }