diff --git a/kernel/cpu.c b/kernel/cpu.c
index 9482ceb928e0137284979c53ef442c1b61ce014c..ff8bc3817dde87c3953863d0d61a785e5147f8df 100644
--- a/kernel/cpu.c
+++ b/kernel/cpu.c
@@ -889,7 +889,7 @@ void notify_cpu_starting(unsigned int cpu)
 	struct cpuhp_cpu_state *st = per_cpu_ptr(&cpuhp_state, cpu);
 	enum cpuhp_state target = min((int)st->target, CPUHP_AP_ONLINE);
 
-	rcu_cpu_starting(cpu);  /* All CPU_STARTING notifiers can use RCU. */
+	rcu_cpu_starting(cpu);	/* Enables RCU usage on this CPU. */
 	while (st->state < target) {
 		struct cpuhp_step *step;