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-rw-r--r--arch/s390/kernel/process.c24
1 files changed, 15 insertions, 9 deletions
diff --git a/arch/s390/kernel/process.c b/arch/s390/kernel/process.c
index 9f3dff6c0b7..78b64fe5e7c 100644
--- a/arch/s390/kernel/process.c
+++ b/arch/s390/kernel/process.c
@@ -99,15 +99,15 @@ void default_idle(void)
{
int cpu, rc;
+ /* CPU is going idle. */
+ cpu = smp_processor_id();
+
local_irq_disable();
- if (need_resched()) {
+ if (need_resched()) {
local_irq_enable();
- schedule();
- return;
- }
+ return;
+ }
- /* CPU is going idle. */
- cpu = smp_processor_id();
rc = notifier_call_chain(&idle_chain, CPU_IDLE, (void *)(long) cpu);
if (rc != NOTIFY_OK && rc != NOTIFY_DONE)
BUG();
@@ -120,7 +120,7 @@ void default_idle(void)
__ctl_set_bit(8, 15);
#ifdef CONFIG_HOTPLUG_CPU
- if (cpu_is_offline(smp_processor_id()))
+ if (cpu_is_offline(cpu))
cpu_die();
#endif
@@ -139,8 +139,14 @@ void default_idle(void)
void cpu_idle(void)
{
- for (;;)
- default_idle();
+ for (;;) {
+ while (!need_resched())
+ default_idle();
+
+ preempt_enable_no_resched();
+ schedule();
+ preempt_disable();
+ }
}
void show_regs(struct pt_regs *regs)