[PATCH] invert irq/migration.c brach prediction

[Daniel Walker <dwalker@mvista.com>]

	If you get to that point in the code it means that 
desc->move_irq is set, pending_irq_cpumask[irq] and cpu_online_map 
should have a value. Still pretty good chance anding those two 
you'll still have a value. So these two branch predictors should
be inverted .

Signed-Off-By: Daniel Walker <dwalker@mvista.com>

Index: linux-2.6.16/kernel/irq/migration.c
===================================================================
--- linux-2.6.16.orig/kernel/irq/migration.c
+++ linux-2.6.16/kernel/irq/migration.c
@@ -30,7 +30,7 @@ void move_native_irq(int irq)
 
 	desc->move_irq = 0;
 
-	if (likely(cpus_empty(pending_irq_cpumask[irq])))
+	if (unlikely(cpus_empty(pending_irq_cpumask[irq])))
 		return;
 
 	if (!desc->handler->set_affinity)
@@ -49,7 +49,7 @@ void move_native_irq(int irq)
 	 * cause some ioapics to mal-function.
 	 * Being paranoid i guess!
 	 */
-	if (unlikely(!cpus_empty(tmp))) {
+	if (likely(!cpus_empty(tmp))) {
 		if (likely(!(desc->status & IRQ_DISABLED)))
 			desc->handler->disable(irq);
 
-
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