From 78929984b35f18549d709e695fda2db9701ed3dd Mon Sep 17 00:00:00 2001
From: phk <phk@FreeBSD.org>
Date: Tue, 1 Apr 2003 12:49:40 +0000
Subject: [PATCH] Introduce bioq_flush() function.

---
 sys/kern/subr_disk.c | 15 +++++++++++++++
 sys/sys/bio.h        |  1 +
 2 files changed, 16 insertions(+)

diff --git a/sys/kern/subr_disk.c b/sys/kern/subr_disk.c
index 35c2295b745e..475b4d873d3a 100644
--- a/sys/kern/subr_disk.c
+++ b/sys/kern/subr_disk.c
@@ -89,6 +89,21 @@ bioq_remove(struct bio_queue_head *head, struct bio *bp)
 	if (TAILQ_FIRST(&head->queue) == head->switch_point)
 		head->switch_point = NULL;
 }
+
+void
+bioq_flush(struct bio_queue_head *head, struct devstat *stp, int error)
+{
+	struct bio *bp;
+
+	for (;;) {
+		bp = bioq_first(head);
+		if (bp == NULL)
+			break;
+		bioq_remove(head, bp);
+		biofinish(bp, stp, ENXIO);
+	}
+}
+
 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 c7e81ea8d114..89b68f588647 100644
--- a/sys/sys/bio.h
+++ b/sys/sys/bio.h
@@ -120,6 +120,7 @@ int biowait(struct bio *bp, const char *wchan);
 void bioq_disksort(struct bio_queue_head *ap, struct bio *bp);
 #define bioqdisksort(foo, bar) bioq_disksort(foo, bar)
 struct bio *bioq_first(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_tail(struct bio_queue_head *head, struct bio *bp);
 void bioq_remove(struct bio_queue_head *head, struct bio *bp);