cpuidle: Move dev->last_residency update to driver enter routine; remove dev->last_state

[deliverable/linux.git] / drivers / cpuidle / governors / menu.c

diff --git a/drivers/cpuidle/governors/menu.c b/drivers/cpuidle/governors/menu.c
index f508690eb95859ef80e217f68db827daba606f29..e4b200c5b441e2384dc2c0ee8bb3263f221c5f29 100644 (file)
--- a/drivers/cpuidle/governors/menu.c
+++ b/drivers/cpuidle/governors/menu.c
@@ -237,6 +237,7 @@ static int menu_select(struct cpuidle_device *dev)
        unsigned int power_usage = -1;
        int i;
        int multiplier;
+       struct timespec t;
 
        if (data->needs_update) {
                menu_update(dev);
@@ -251,8 +252,9 @@ static int menu_select(struct cpuidle_device *dev)
                return 0;
 
        /* determine the expected residency time, round up */
+       t = ktime_to_timespec(tick_nohz_get_sleep_length());
        data->expected_us =
-           DIV_ROUND_UP((u32)ktime_to_ns(tick_nohz_get_sleep_length()), 1000);
+               t.tv_sec * USEC_PER_SEC + t.tv_nsec / NSEC_PER_USEC;
 
 
        data->bucket = which_bucket(data->expected_us);
@@ -308,14 +310,17 @@ static int menu_select(struct cpuidle_device *dev)
 /**
  * menu_reflect - records that data structures need update
  * @dev: the CPU
+ * @index: the index of actual entered state
  *
  * NOTE: it's important to be fast here because this operation will add to
  *       the overall exit latency.
  */
-static void menu_reflect(struct cpuidle_device *dev)
+static void menu_reflect(struct cpuidle_device *dev, int index)
 {
        struct menu_device *data = &__get_cpu_var(menu_devices);
-       data->needs_update = 1;
+       data->last_state_idx = index;
+       if (index >= 0)
+               data->needs_update = 1;
 }
 
 /**