[src/trunk]: src/sys/kern vfs_vnode_iterator_destroy: set v_usecount of marke...

[hannken <hannken%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/bd559a9c3c7b
branches:  trunk
changeset: 335475:bd559a9c3c7b
user:      hannken <hannken%NetBSD.org@localhost>
date:      Thu Jan 08 12:06:50 2015 +0000

description:
vfs_vnode_iterator_destroy: set v_usecount of marker to zero to prevent
an assertion from vnfree().

diffstat:

 sys/kern/vfs_mount.c |  8 +++++---
 1 files changed, 5 insertions(+), 3 deletions(-)

diffs (30 lines):

diff -r 44d1d6917934 -r bd559a9c3c7b sys/kern/vfs_mount.c
--- a/sys/kern/vfs_mount.c      Thu Jan 08 10:47:44 2015 +0000
+++ b/sys/kern/vfs_mount.c      Thu Jan 08 12:06:50 2015 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: vfs_mount.c,v 1.31 2014/11/14 10:09:50 manu Exp $      */
+/*     $NetBSD: vfs_mount.c,v 1.32 2015/01/08 12:06:50 hannken Exp $   */
 
 /*-
  * Copyright (c) 1997-2011 The NetBSD Foundation, Inc.
@@ -67,7 +67,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: vfs_mount.c,v 1.31 2014/11/14 10:09:50 manu Exp $");
+__KERNEL_RCSID(0, "$NetBSD: vfs_mount.c,v 1.32 2015/01/08 12:06:50 hannken Exp $");
 
 #define _VFS_VNODE_PRIVATE
 
@@ -365,8 +365,10 @@
 
        mutex_enter(&mntvnode_lock);
        KASSERT(ISSET(mvp->v_iflag, VI_MARKER));
-       if (mvp->v_usecount != 0)
+       if (mvp->v_usecount != 0) {
                TAILQ_REMOVE(&mvp->v_mount->mnt_vnodelist, mvp, v_mntvnodes);
+               mvp->v_usecount = 0;
+       }
        mutex_exit(&mntvnode_lock);
        vnfree(mvp);
 }