diff --git a/kernel/sched/idle.c b/kernel/sched/idle.c
index 5f3a52387c84..1b9856cd08ab 100755
--- a/kernel/sched/idle.c
+++ b/kernel/sched/idle.c
@@ -229,6 +229,7 @@ exit_idle:
  */
 static void do_idle(void)
 {
+	int cpu = smp_processor_id();
 	/*
 	 * If the arch has a polling bit, we maintain an invariant:
 	 *
@@ -246,7 +247,7 @@ static void do_idle(void)
 		check_pgt_cache();
 		rmb();
 
-		if (cpu_is_offline(smp_processor_id())) {
+		if (cpu_is_offline(cpu)) {
 			tick_nohz_idle_stop_tick_protected();
 			cpuhp_report_idle_dead();
 			arch_cpu_idle_dead();