[src/trunk]: src/sys/kern Assign vnode to dead_rootmount before vcache_deallo...

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

details:   https://anonhg.NetBSD.org/src/rev/2441b8172940
branches:  trunk
changeset: 997071:2441b8172940
user:      hannken <hannken%NetBSD.org@localhost>
date:      Wed Feb 20 10:06:33 2019 +0000

description:
Assign vnode to dead_rootmount before vcache_dealloc() releases it.

Now v_mount is never NULL.

diffstat:

 sys/kern/vfs_vnode.c |  6 ++++--
 1 files changed, 4 insertions(+), 2 deletions(-)

diffs (27 lines):

diff -r f2e96b26cbb0 -r 2441b8172940 sys/kern/vfs_vnode.c
--- a/sys/kern/vfs_vnode.c      Wed Feb 20 10:05:59 2019 +0000
+++ b/sys/kern/vfs_vnode.c      Wed Feb 20 10:06:33 2019 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: vfs_vnode.c,v 1.101 2019/01/01 10:06:54 hannken Exp $  */
+/*     $NetBSD: vfs_vnode.c,v 1.102 2019/02/20 10:06:33 hannken Exp $  */
 
 /*-
  * Copyright (c) 1997-2011 The NetBSD Foundation, Inc.
@@ -156,7 +156,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: vfs_vnode.c,v 1.101 2019/01/01 10:06:54 hannken Exp $");
+__KERNEL_RCSID(0, "$NetBSD: vfs_vnode.c,v 1.102 2019/02/20 10:06:33 hannken Exp $");
 
 #include <sys/param.h>
 #include <sys/kernel.h>
@@ -1162,6 +1162,8 @@
        KASSERT(mutex_owned(&vcache_lock));
 
        vp = VIMPL_TO_VNODE(vip);
+       vfs_ref(dead_rootmount);
+       vfs_insmntque(vp, dead_rootmount);
        mutex_enter(vp->v_interlock);
        vp->v_op = dead_vnodeop_p;
        VSTATE_CHANGE(vp, VS_LOADING, VS_RECLAIMED);