From 1ad749980a5fda46f7ec920d8409ddcc89b38714 Mon Sep 17 00:00:00 2001
From: Tony Breeds <tony@bakeyournoodle.com>
Date: Fri, 21 Sep 2007 13:26:03 +1000
Subject: [POWERPC] Enable tickless idle and high res timers for powerpc

Signed-off-by: Tony Breeds <tony@bakeyournoodle.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
---
 arch/powerpc/platforms/iseries/setup.c | 6 ++++++
 1 file changed, 6 insertions(+)

(limited to 'arch/powerpc/platforms/iseries')

diff --git a/arch/powerpc/platforms/iseries/setup.c b/arch/powerpc/platforms/iseries/setup.c
index fad493e29d37..37ae07ee54a9 100644
--- a/arch/powerpc/platforms/iseries/setup.c
+++ b/arch/powerpc/platforms/iseries/setup.c
@@ -26,6 +26,8 @@
 #include <linux/major.h>
 #include <linux/root_dev.h>
 #include <linux/kernel.h>
+#include <linux/hrtimer.h>
+#include <linux/tick.h>
 
 #include <asm/processor.h>
 #include <asm/machdep.h>
@@ -561,6 +563,7 @@ static void yield_shared_processor(void)
 static void iseries_shared_idle(void)
 {
 	while (1) {
+		tick_nohz_stop_sched_tick();
 		while (!need_resched() && !hvlpevent_is_pending()) {
 			local_irq_disable();
 			ppc64_runlatch_off();
@@ -574,6 +577,7 @@ static void iseries_shared_idle(void)
 		}
 
 		ppc64_runlatch_on();
+		tick_nohz_restart_sched_tick();
 
 		if (hvlpevent_is_pending())
 			process_iSeries_events();
@@ -589,6 +593,7 @@ static void iseries_dedicated_idle(void)
 	set_thread_flag(TIF_POLLING_NRFLAG);
 
 	while (1) {
+		tick_nohz_stop_sched_tick();
 		if (!need_resched()) {
 			while (!need_resched()) {
 				ppc64_runlatch_off();
@@ -605,6 +610,7 @@ static void iseries_dedicated_idle(void)
 		}
 
 		ppc64_runlatch_on();
+		tick_nohz_restart_sched_tick();
 		preempt_enable_no_resched();
 		schedule();
 		preempt_disable();
-- 
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