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| author |   Len Brown <len.brown@intel.com> | 2007-10-10 00:32:13 -0400 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2007-10-10 00:32:13 -0400 |
| commit | de85871a9a53c00cae4c3a70849b5eaad0eb38b2 (patch) | |
| tree | e1f5ea71da333598db35a63a2c6faa1343037412 /kernel | |
| parent | Pull bugzilla-8709 into release branch (diff) | |
| parent | ACPI: cpuidle: port idle timer suspend/resume workaround to cpuidle (diff) | |
| download | linux-dev-de85871a9a53c00cae4c3a70849b5eaad0eb38b2.tar.xz linux-dev-de85871a9a53c00cae4c3a70849b5eaad0eb38b2.zip | |
Pull cpuidle into test branch
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/time/tick-sched.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/kernel/time/tick-sched.c b/kernel/time/tick-sched.c index 8c3fef1db09c..637519af6151 100644 --- 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); @@ -302,11 +303,26 @@ 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 * * Restart the idle tick when the CPU is woken up from idle |