sh: CPU hotplug support.
This adds preliminary support for CPU hotplug for SH SMP systems.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
diff --git a/arch/sh/kernel/idle.c b/arch/sh/kernel/idle.c
index 2040053..425d604 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 @@
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();