From 763142d1efb56effe614d71185781796c4b83c78 Mon Sep 17 00:00:00 2001
From: Paul Mundt <lethal@linux-sh.org>
Date: Mon, 26 Apr 2010 19:08:55 +0900
Subject: sh: CPU hotplug support.

This adds preliminary support for CPU hotplug for SH SMP systems.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
 arch/sh/kernel/idle.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

(limited to 'arch/sh/kernel/idle.c')

diff --git a/arch/sh/kernel/idle.c b/arch/sh/kernel/idle.c
index 204005329fe1..425d604e3a28 100644
--- a/arch/sh/kernel/idle.c
+++ b/arch/sh/kernel/idle.c
@@ -19,6 +19,7 @@
 #include <asm/pgalloc.h>
 #include <asm/system.h>
 #include <asm/atomic.h>
+#include <asm/smp.h>
 
 void (*pm_idle)(void) = NULL;
 
@@ -89,10 +90,13 @@ void cpu_idle(void)
 	while (1) {
 		tick_nohz_stop_sched_tick(1);
 
-		while (!need_resched() && cpu_online(cpu)) {
+		while (!need_resched()) {
 			check_pgt_cache();
 			rmb();
 
+			if (cpu_is_offline(cpu))
+				play_dead();
+
 			local_irq_disable();
 			/* Don't trace irqs off for idle */
 			stop_critical_timings();
-- 
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