2 files changed, 2 insertions, 0 deletions

diff --git a/include/trace/events/rcu.h b/include/trace/events/rcu.h
index 337099783f37..aaa55e1b8c48 100644
--- a/include/trace/events/rcu.h
+++ b/include/trace/events/rcu.h
@@ -292,6 +292,7 @@ TRACE_EVENT(rcu_dyntick,
  *      "More callbacks": Still more callbacks, try again to clear them out.
  *      "Callbacks drained": All callbacks processed, off to dyntick idle!
  *      "Timer": Timer fired to cause CPU to continue processing callbacks.
+ *      "Cleanup after idle": Idle exited, timer canceled.
  */
 TRACE_EVENT(rcu_prep_idle,
 
diff --git a/kernel/rcutree_plugin.h b/kernel/rcutree_plugin.h
index c023464816be..1e561ab952a3 100644
--- a/kernel/rcutree_plugin.h
+++ b/kernel/rcutree_plugin.h
@@ -2085,6 +2085,7 @@ static void rcu_prepare_for_idle_init(int cpu)
 static void rcu_cleanup_after_idle(int cpu)
 {
         hrtimer_cancel(&per_cpu(rcu_idle_gp_timer, cpu));
+        trace_rcu_prep_idle("Cleanup after idle");
 }
 
 /*