2 files changed, 8 insertions, 0 deletions

diff --git a/sys/kern/subr_disk.c b/sys/kern/subr_disk.c
index fcd0c9da63b0..9d1ef07d0062 100644
--- a/sys/kern/subr_disk.c
+++ b/sys/kern/subr_disk.c
@@ -99,6 +99,13 @@ bioq_flush(struct bio_queue_head *head, struct devstat *stp, int error)
 }
 
 void
+bioq_insert_head(struct bio_queue_head *head, struct bio *bp)
+{
+
+	TAILQ_INSERT_HEAD(&head->queue, bp, bio_queue);
+}
+
+void
 bioq_insert_tail(struct bio_queue_head *head, struct bio *bp)
 {
 
diff --git a/sys/sys/bio.h b/sys/sys/bio.h
index 52a7bf894563..cb1a5a2486a8 100644
--- a/sys/sys/bio.h
+++ b/sys/sys/bio.h
@@ -118,6 +118,7 @@ struct bio *bioq_first(struct bio_queue_head *head);
 struct bio *bioq_takefirst(struct bio_queue_head *head);
 void bioq_flush(struct bio_queue_head *head, struct devstat *stp, int error);
 void bioq_init(struct bio_queue_head *head);
+void bioq_insert_head(struct bio_queue_head *head, struct bio *bp);
 void bioq_insert_tail(struct bio_queue_head *head, struct bio *bp);
 void bioq_remove(struct bio_queue_head *head, struct bio *bp);