sched/idle: replace smp_mb__after_atomic function in cpu_idle_loop

The function used widely in drivers, so better not to use it in
backporting.

Signed-off-by: Alex Shi <alex.shi@linaro.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/kernel/sched/idle.c b/kernel/sched/idle.c
index d2458063b5f..0699101147a 100644
--- a/kernel/sched/idle.c
+++ b/kernel/sched/idle.c
@@ -241,7 +241,7 @@ static void cpu_idle_loop(void)
 		 * means that clearing polling needs to be visible
 		 * before doing these things.
 		 */
-		smp_mb__after_atomic();
+		smp_mb();
 
 		sched_ttwu_pending();
 		schedule_preempt_disabled();