Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux...

[pandora-kernel.git] / kernel / time / tick-sched.c

diff --git a/kernel/time/tick-sched.c b/kernel/time/tick-sched.c
index ce89ffb..10a1347 100644 (file)
--- a/kernel/time/tick-sched.c
+++ b/kernel/time/tick-sched.c
@@ -153,6 +153,7 @@ void tick_nohz_stop_sched_tick(void)
        unsigned long seq, last_jiffies, next_jiffies, delta_jiffies, flags;
        struct tick_sched *ts;
        ktime_t last_update, expires, now, delta;
+       struct clock_event_device *dev = __get_cpu_var(tick_cpu_device).evtdev;
        int cpu;
 
        local_irq_save(flags);
@@ -302,10 +303,25 @@ void tick_nohz_stop_sched_tick(void)
 out:
        ts->next_jiffies = next_jiffies;
        ts->last_jiffies = last_jiffies;
+       ts->sleep_length = ktime_sub(dev->next_event, now);
 end:
        local_irq_restore(flags);
 }
 
+/**
+ * tick_nohz_get_sleep_length - return the length of the current sleep
+ *
+ * Called from power state control code with interrupts disabled
+ */
+ktime_t tick_nohz_get_sleep_length(void)
+{
+       struct tick_sched *ts = &__get_cpu_var(tick_cpu_sched);
+
+       return ts->sleep_length;
+}
+
+EXPORT_SYMBOL_GPL(tick_nohz_get_sleep_length);
+
 /**
  * nohz_restart_sched_tick - restart the idle tick from the idle task
  *