diff --git a/drivers/md/raid5.h b/drivers/md/raid5.h
index 1f16d43..32c8ce8 100644
--- a/drivers/md/raid5.h
+++ b/drivers/md/raid5.h
@@ -629,4 +629,5 @@
 extern void r5l_write_stripe_run(struct r5l_log *log);
 extern void r5l_flush_stripe_to_raid(struct r5l_log *log);
 extern void r5l_stripe_write_finished(struct stripe_head *sh);
+extern int r5l_handle_flush_request(struct r5l_log *log, struct bio *bio);
 #endif