diff --git a/block/blk-mq-sched.c b/block/blk-mq-sched.c
index aa6bc5c..f6e3b10 100644
--- a/block/blk-mq-sched.c
+++ b/block/blk-mq-sched.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * blk-mq scheduling framework
  *