diff --git a/kernel/events/core.c b/kernel/events/core.c
index 407dad6cf89ac55e221c3a4519ed2c25c1241dc7..bc63f8db1b0d218f09ae489fbfbeb042e82f5cf6 100644
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -925,11 +925,6 @@ static inline int is_cgroup_event(struct perf_event *event)
 	return 0;
 }
 
-static inline u64 perf_cgroup_event_cgrp_time(struct perf_event *event)
-{
-	return 0;
-}
-
 static inline void update_cgrp_time_from_event(struct perf_event *event)
 {
 }