[PATCH] powerpc: Ensure runlatch is off in the idle loop

Since external and decrementer interrupts set the runlatch on, we need
to ensure its set off again in the idle loop. At the moment we dont turn
it off in the inner loop.
Signed-off-by: NAnton Blanchard <anton@samba.org>
Signed-off-by: NPaul Mackerras <paulus@samba.org>

arch/powerpc/kernel/idle.c

@@ -50,9 +50,9 @@ void cpu_idle(void)
 
 	set_thread_flag(TIF_POLLING_NRFLAG);
 	while (1) {
-		ppc64_runlatch_off();
-
 		while (!need_resched() && !cpu_should_die()) {
+			ppc64_runlatch_off();
+
 			if (ppc_md.power_save) {
 				clear_thread_flag(TIF_POLLING_NRFLAG);
 				/*