Index: kern/subr_disk.c
===================================================================
RCS file: /private/FreeBSD/src/sys/kern/subr_disk.c,v
retrieving revision 1.81
diff -u -p -r1.81 subr_disk.c
--- kern/subr_disk.c	19 Aug 2004 19:51:51 -0000	1.81
+++ kern/subr_disk.c	13 Dec 2004 12:49:08 -0000
@@ -99,6 +99,13 @@ bioq_flush(struct bio_queue_head *head, 
 }
 
 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)
 {
 
Index: sys/bio.h
===================================================================
RCS file: /private/FreeBSD/src/sys/sys/bio.h,v
retrieving revision 1.141
diff -u -p -r1.141 bio.h
--- sys/bio.h	30 Aug 2004 09:33:06 -0000	1.141
+++ sys/bio.h	13 Dec 2004 12:49:37 -0000
@@ -118,6 +118,7 @@ struct bio *bioq_first(struct bio_queue_
 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);