From 483140ead1618cf00d359780f603758d3c8ccc2d Mon Sep 17 00:00:00 2001
From: John Dyson <dyson@FreeBSD.org>
Date: Mon, 29 Dec 1997 16:54:03 +0000
Subject: [PATCH] Add the vnode interlock back around vref.

---
 sys/kern/vfs_export.c | 10 +++++++++-
 sys/kern/vfs_subr.c   | 10 +++++++++-
 2 files changed, 18 insertions(+), 2 deletions(-)

diff --git a/sys/kern/vfs_export.c b/sys/kern/vfs_export.c
index 69f110188130..9a371b89c419 100644
--- a/sys/kern/vfs_export.c
+++ b/sys/kern/vfs_export.c
@@ -36,7 +36,7 @@
  * SUCH DAMAGE.
  *
  *	@(#)vfs_subr.c	8.31 (Berkeley) 5/26/95
- * $Id: vfs_subr.c,v 1.117 1997/12/29 00:22:45 dyson Exp $
+ * $Id: vfs_subr.c,v 1.118 1997/12/29 01:03:41 dyson Exp $
  */
 
 /*
@@ -880,6 +880,14 @@ vget(vp, flags, p)
 	return (0);
 }
 
+void
+vref(struct vnode *vp)
+{
+	simple_lock(&vp->v_interlock);
+	vp->v_usecount++;
+	simple_unlock(&vp->v_interlock);
+}
+
 /*
  * Vnode put/release.
  * If count drops to zero, call inactive routine and return to freelist.
diff --git a/sys/kern/vfs_subr.c b/sys/kern/vfs_subr.c
index 69f110188130..9a371b89c419 100644
--- a/sys/kern/vfs_subr.c
+++ b/sys/kern/vfs_subr.c
@@ -36,7 +36,7 @@
  * SUCH DAMAGE.
  *
  *	@(#)vfs_subr.c	8.31 (Berkeley) 5/26/95
- * $Id: vfs_subr.c,v 1.117 1997/12/29 00:22:45 dyson Exp $
+ * $Id: vfs_subr.c,v 1.118 1997/12/29 01:03:41 dyson Exp $
  */
 
 /*
@@ -880,6 +880,14 @@ vget(vp, flags, p)
 	return (0);
 }
 
+void
+vref(struct vnode *vp)
+{
+	simple_lock(&vp->v_interlock);
+	vp->v_usecount++;
+	simple_unlock(&vp->v_interlock);
+}
+
 /*
  * Vnode put/release.
  * If count drops to zero, call inactive routine and return to freelist.