diff --git a/kernel/workqueue.c b/kernel/workqueue.c
index 80190755a3c4b6b98b20debc8840616b3c08dfe5..bd4b24d3489dac4fe93f2e026a298c327b567213 100644
--- a/kernel/workqueue.c
+++ b/kernel/workqueue.c
@@ -337,8 +337,6 @@ struct workqueue_struct *system_freezable_power_efficient_wq __read_mostly;
 EXPORT_SYMBOL_GPL(system_freezable_power_efficient_wq);
 
 static int worker_thread(void *__worker);
-static void copy_workqueue_attrs(struct workqueue_attrs *to,
-				 const struct workqueue_attrs *from);
 static void workqueue_sysfs_unregister(struct workqueue_struct *wq);
 
 #define CREATE_TRACE_POINTS