diff --git a/include/linux/sched.h b/include/linux/sched.h
index ab80596dddfdc7d9e69bc050c37f100ba205c7db..ac98255d00fb2bcec46c673cba26bc36a1a89ae0 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -172,8 +172,6 @@ struct uts_namespace;
 
 extern cpumask_var_t cpu_isolated_map;
 
-extern int runqueue_is_locked(int cpu);
-
 extern void scheduler_tick(void);
 
 #define	MAX_SCHEDULE_TIMEOUT	LONG_MAX