diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index dc2c703..31e1105 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -796,6 +796,7 @@
 extern struct request *blk_get_request(struct request_queue *, int, gfp_t);
 extern struct request *blk_make_request(struct request_queue *, struct bio *,
 					gfp_t);
+extern void blk_rq_set_block_pc(struct request *);
 extern void blk_requeue_request(struct request_queue *, struct request *);
 extern void blk_add_request_payload(struct request *rq, struct page *page,
 		unsigned int len);