From 2eab8b3609fc71ea44ba0c8f7f350400434f4a10 Mon Sep 17 00:00:00 2001
From: Matthew Dillon <dillon@FreeBSD.org>
Date: Fri, 17 Sep 1999 05:03:27 +0000
Subject: [PATCH]     Add required BUF_KERNPROC to flushchainbuf() to
 disassociate the     current process from the exclusive lock prior to
 initiating I/O.

    This fixes a panic related to swap-backed VN disks

Reviewed by:	Alan Cox <alc@cs.rice.edu>, David Greenman <dg@root.com>
---
 sys/vm/vm_pager.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/sys/vm/vm_pager.c b/sys/vm/vm_pager.c
index 70452ed04ebd..a9e1c7e93283 100644
--- a/sys/vm/vm_pager.c
+++ b/sys/vm/vm_pager.c
@@ -566,6 +566,7 @@ flushchainbuf(struct buf *nbp)
 		nbp->b_bufsize = nbp->b_bcount;
 		if ((nbp->b_flags & B_READ) == 0)
 			nbp->b_dirtyend = nbp->b_bcount;
+		BUF_KERNPROC(nbp);
 		VOP_STRATEGY(nbp->b_vp, nbp);
 	} else {
 		biodone(nbp);