cpuidle: Remove time measurement in poll state

The time measurement is already done in the cpuidle framework in the
'cpuidle_enter_state' function.

Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

diff --git a/drivers/cpuidle/driver.c b/drivers/cpuidle/driver.c
index 9634f20e392611b32349aaa348aa3980f2344ecd..e431d11abf8d86deb79b200ef17eaa24a2c139ca 100644 (file)
--- a/drivers/cpuidle/driver.c
+++ b/drivers/cpuidle/driver.c
@@ -182,10 +182,6 @@ static void __cpuidle_driver_init(struct cpuidle_driver *drv)
 static int poll_idle(struct cpuidle_device *dev,
                struct cpuidle_driver *drv, int index)
 {
-       ktime_t t1, t2;
-       s64 diff;
-
-       t1 = ktime_get();
        local_irq_enable();
        if (!current_set_polling_and_test()) {
                while (!need_resched())
@@ -193,13 +189,6 @@ static int poll_idle(struct cpuidle_device *dev,
        }
        current_clr_polling();
 
-       t2 = ktime_get();
-       diff = ktime_to_us(ktime_sub(t2, t1));
-       if (diff > INT_MAX)
-               diff = INT_MAX;
-
-       dev->last_residency = (int) diff;
-
        return index;
 }