[ARM] 4258/2: Support for dynticks in idle loop

And, wrap timer_tick() and sysdev suspend/resume in
!GENERIC_CLOCKEVENTS since clockevent layer takes care
of these.

Signed-off-by: Kevin Hilman <khilman@mvista.com>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

diff --git a/arch/arm/kernel/process.c b/arch/arm/kernel/process.c
index 8afd83d0cbdd98fc98c51d71f86b38c95323af37..5d6e6523598b88359afac5ad473cc4c26dd521b2 100644 (file)
--- a/arch/arm/kernel/process.c
+++ b/arch/arm/kernel/process.c
@@ -27,6 +27,7 @@
 #include <linux/cpu.h>
 #include <linux/elfcore.h>
 #include <linux/pm.h>
+#include <linux/tick.h>
 
 #include <asm/leds.h>
 #include <asm/processor.h>
@@ -159,9 +160,11 @@ void cpu_idle(void)
                if (!idle)
                        idle = default_idle;
                leds_event(led_idle_start);
+               tick_nohz_stop_sched_tick();
                while (!need_resched())
                        idle();
                leds_event(led_idle_end);
+               tick_nohz_restart_sched_tick();
                preempt_enable_no_resched();
                schedule();
                preempt_disable();

diff --git a/arch/arm/kernel/time.c b/arch/arm/kernel/time.c
index f61decb89ba25ffcb58933d8ece66a6918b0606e..d0540e4eaf5b328d9f8a248df8a40647add6d03b 100644 (file)
--- a/arch/arm/kernel/time.c
+++ b/arch/arm/kernel/time.c
@@ -327,6 +327,7 @@ void restore_time_delta(struct timespec *delta, struct timespec *rtc)
 }
 EXPORT_SYMBOL(restore_time_delta);
 
+#ifndef CONFIG_GENERIC_CLOCKEVENTS
 /*
  * Kernel system timer support.
  */
@@ -340,8 +341,9 @@ void timer_tick(void)
        update_process_times(user_mode(get_irq_regs()));
 #endif
 }
+#endif
 
-#ifdef CONFIG_PM
+#if defined(CONFIG_PM) && !defined(CONFIG_GENERIC_CLOCKEVENTS)
 static int timer_suspend(struct sys_device *dev, pm_message_t state)
 {
        struct sys_timer *timer = container_of(dev, struct sys_timer, dev);