idle: Remove stale RCU comment

The call of rcu_idle_enter() from within cpuidle_idle_call() was
removed in commit 1098582a0f6c ("sched,idle,rcu: Push rcu_idle deeper
into the idle path") which makes the comment out of place.

Signed-off-by: Christian Loehle <christian.loehle@arm.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/5b936388-47df-4050-9229-6617a6c2bba5@arm.com

diff --git a/kernel/sched/idle.c b/kernel/sched/idle.c
index 770e6984f264a8923c04420c11a9eb6f1bea2a37..6e78d071beb58ad26665be2c87e46bc7bab061b4 100644 (file)
--- a/kernel/sched/idle.c
+++ b/kernel/sched/idle.c
@@ -179,12 +179,6 @@ static void cpuidle_idle_call(void)
                return;
        }
 
-       /*
-        * The RCU framework needs to be told that we are entering an idle
-        * section, so no more RCU read side critical sections and one more
-        * step to the grace period
-        */
-
        if (cpuidle_not_available(drv, dev)) {
                tick_nohz_idle_stop_tick();