diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index 9dd922c6923900cf73d97e3864152b2989b9d9e7..b36b08325c04ae711ab5e00a8b57fc246ce0ff8c 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -3218,11 +3218,6 @@ pick_next_task(struct rq *rq, struct task_struct *prev, struct rq_flags *rf)
 	BUG();
 }
 
-static int is_kthread(int flags)
-{
-	return flags & PF_KTHREAD && ! (flags & PF_IDLE);
-}
-
 /*
  * __schedule() is the main scheduler function.
  *