diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h
index e07446c5546a..c168a91ef6d7 100644
--- a/include/linux/perf_event.h
+++ b/include/linux/perf_event.h
@@ -648,6 +648,7 @@ struct perf_event {
 
 	int				oncpu;
 	int				cpu;
+	cpumask_t			readable_on_cpus;
 
 	struct list_head		owner_entry;
 	struct task_struct		*owner;