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authorRafael J. Wysocki <rafael.j.wysocki@intel.com>2018-10-15 13:51:45 +0200
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2018-10-18 09:34:13 +0200
commit12b65eadf0bd41cf0dbf460f13bcd310a81afe2b (patch)
tree21c6aa8bcaaf1aad8f13ed6855212dffd33f89a8 /drivers/cpuidle
parentbde091ece2ad3f78d0896870f041bc52761ea3c1 (diff)
downloadlinux-12b65eadf0bd41cf0dbf460f13bcd310a81afe2b.tar.bz2
cpuidle: menu: Drop redundant comparison
Since the correction factor cannot be greater than RESOLUTION * DECAY, the result of the predicted_us computation in menu_select() cannot be greater than data->next_timer_us, so it is not necessary to compare the "typical interval" value coming from get_typical_interval() with data->next_timer_us separately. It is sufficient to copmare predicted_us with the return value of get_typical_interval() directly, so do that and drop the now redundant expected_interval variable. No intentional changes of behavior. Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/cpuidle')
-rw-r--r--drivers/cpuidle/governors/menu.c7
1 files changed, 1 insertions, 6 deletions
diff --git a/drivers/cpuidle/governors/menu.c b/drivers/cpuidle/governors/menu.c
index 4ed8004643f8..3d283211ad77 100644
--- a/drivers/cpuidle/governors/menu.c
+++ b/drivers/cpuidle/governors/menu.c
@@ -287,7 +287,6 @@ static int menu_select(struct cpuidle_driver *drv, struct cpuidle_device *dev,
int i;
int idx;
unsigned int interactivity_req;
- unsigned int expected_interval;
unsigned int predicted_us;
unsigned long nr_iowaiters, cpu_load;
ktime_t delta_next;
@@ -323,14 +322,10 @@ static int menu_select(struct cpuidle_driver *drv, struct cpuidle_device *dev,
predicted_us = DIV_ROUND_CLOSEST_ULL((uint64_t)data->next_timer_us *
data->correction_factor[data->bucket],
RESOLUTION * DECAY);
-
- expected_interval = get_typical_interval(data);
- expected_interval = min(expected_interval, data->next_timer_us);
-
/*
* Use the lowest expected idle interval to pick the idle state.
*/
- predicted_us = min(predicted_us, expected_interval);
+ predicted_us = min(predicted_us, get_typical_interval(data));
if (tick_nohz_tick_stopped()) {
/*