From 7146d6cb3e9b88a881f8133cb98106feb39a1f44 Mon Sep 17 00:00:00 2001
From: Poul-Henning Kamp <phk@FreeBSD.org>
Date: Fri, 28 Jan 2005 08:56:48 +0000
Subject: [PATCH] Move the contents of vop_stddestroyvobject() to the new
 vnode_pager function vnode_destroy_vobject().

Make the new function zero the vp->v_object pointer so we can tell
if a call is missing.
---
 sys/kern/vfs_default.c | 26 +-------------------------
 sys/sys/vnode.h        |  1 +
 sys/vm/vnode_pager.c   | 33 +++++++++++++++++++++++++++++++++
 3 files changed, 35 insertions(+), 25 deletions(-)

diff --git a/sys/kern/vfs_default.c b/sys/kern/vfs_default.c
index 1798a9ec0cbb..73643e013c70 100644
--- a/sys/kern/vfs_default.c
+++ b/sys/kern/vfs_default.c
@@ -366,32 +366,8 @@ vop_stddestroyvobject(ap)
 		struct vnode *vp;
 	} */ *ap;
 {
-	struct vnode *vp = ap->a_vp;
-	vm_object_t obj = vp->v_object;
 
-	if (obj == NULL)
-		return (0);
-	VM_OBJECT_LOCK(obj);
-	if (obj->ref_count == 0) {
-		/*
-		 * vclean() may be called twice. The first time
-		 * removes the primary reference to the object,
-		 * the second time goes one further and is a
-		 * special-case to terminate the object.
-		 *
-		 * don't double-terminate the object
-		 */
-		if ((obj->flags & OBJ_DEAD) == 0)
-			vm_object_terminate(obj);
-		else
-			VM_OBJECT_UNLOCK(obj);
-	} else {
-		/*
-		 * Woe to the process that tries to page now :-).
-		 */
-		vm_pager_deallocate(obj);
-		VM_OBJECT_UNLOCK(obj);
-	}
+	vnode_destroy_vobject(ap->a_vp);
 	return (0);
 }
 
diff --git a/sys/sys/vnode.h b/sys/sys/vnode.h
index 8445326ac3ac..ea55ece339e3 100644
--- a/sys/sys/vnode.h
+++ b/sys/sys/vnode.h
@@ -687,6 +687,7 @@ void	vbusy(struct vnode *vp);
 void 	v_addpollinfo(struct vnode *vp);
 
 int vnode_create_vobject(struct vnode *vp, size_t size, struct thread *td);
+void vnode_destroy_vobject(struct vnode *vp);
 
 extern struct vop_vector fifo_specops;
 extern struct vop_vector dead_vnodeops;
diff --git a/sys/vm/vnode_pager.c b/sys/vm/vnode_pager.c
index 96aa36ceb084..0f9c3ebd5337 100644
--- a/sys/vm/vnode_pager.c
+++ b/sys/vm/vnode_pager.c
@@ -150,6 +150,39 @@ vnode_create_vobject(struct vnode *vp, size_t isize, struct thread *td)
 	return (0);
 }
 
+void
+vnode_destroy_vobject(struct vnode *vp)
+{
+	struct vm_object *obj;
+
+	obj = vp->v_object;
+	if (obj == NULL)
+		return;
+	vp->v_object = NULL;
+	VM_OBJECT_LOCK(obj);
+	if (obj->ref_count == 0) {
+		/*
+		 * vclean() may be called twice. The first time
+		 * removes the primary reference to the object,
+		 * the second time goes one further and is a
+		 * special-case to terminate the object.
+		 *
+		 * don't double-terminate the object
+		 */
+		if ((obj->flags & OBJ_DEAD) == 0)
+			vm_object_terminate(obj);
+		else
+			VM_OBJECT_UNLOCK(obj);
+	} else {
+		/*
+		 * Woe to the process that tries to page now :-).
+		 */
+		vm_pager_deallocate(obj);
+		VM_OBJECT_UNLOCK(obj);
+	}
+}
+
+
 /*
  * Allocate (or lookup) pager for a vnode.
  * Handle is a vnode pointer.