Merge branch 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...

[karo-tx-linux.git] / drivers / cpuidle / cpuidle.c

diff --git a/drivers/cpuidle/cpuidle.c b/drivers/cpuidle/cpuidle.c
index a5d9f2e470ea1fc9f94536f230d60c0633933dda..33253930247f758a9db032632ff14e68e41a1990 100644 (file)
--- a/drivers/cpuidle/cpuidle.c
+++ b/drivers/cpuidle/cpuidle.c
@@ -112,7 +112,12 @@ int cpuidle_find_deepest_state(struct cpuidle_driver *drv,
 static void enter_freeze_proper(struct cpuidle_driver *drv,
                                struct cpuidle_device *dev, int index)
 {
-       tick_freeze();
+       /*
+        * trace_suspend_resume() called by tick_freeze() for the last CPU
+        * executing it contains RCU usage regarded as invalid in the idle
+        * context, so tell RCU about that.
+        */
+       RCU_NONIDLE(tick_freeze());
        /*
         * The state used here cannot be a "coupled" one, because the "coupled"
         * cpuidle mechanism enables interrupts and doing that with timekeeping
@@ -123,7 +128,7 @@ static void enter_freeze_proper(struct cpuidle_driver *drv,
        WARN_ON(!irqs_disabled());
        /*
         * timekeeping_resume() that will be called by tick_unfreeze() for the
-        * last CPU executing it calls functions containing RCU read-side
+        * first CPU executing it calls functions containing RCU read-side
         * critical sections, so tell RCU about that.
         */
        RCU_NONIDLE(tick_unfreeze());