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From: Konstantin Belousov <kib@FreeBSD.org>
Date: Sat, 19 Nov 2011 07:41:37 +0000 (UTC)
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Subject: svn commit: r227696 - head/sys/fs/nullfs
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Author: kib
Date: Sat Nov 19 07:41:37 2011
New Revision: 227696
URL: http://svn.freebsd.org/changeset/base/227696

Log:
  Do not use NULLVPTOLOWERVP() in the null_print(). If diagnostic is compiled
  in, and show vnode is used from ddb on the faulty nullfs vnode, we get
  panic instead of vnode dump.
  
  MFC after:	1 week

Modified:
  head/sys/fs/nullfs/null_vnops.c

Modified: head/sys/fs/nullfs/null_vnops.c
==============================================================================
--- head/sys/fs/nullfs/null_vnops.c	Sat Nov 19 07:40:13 2011	(r227695)
+++ head/sys/fs/nullfs/null_vnops.c	Sat Nov 19 07:41:37 2011	(r227696)
@@ -729,7 +729,7 @@ null_print(struct vop_print_args *ap)
 {
 	struct vnode *vp = ap->a_vp;
 
-	printf("\tvp=%p, lowervp=%p\n", vp, NULLVPTOLOWERVP(vp));
+	printf("\tvp=%p, lowervp=%p\n", vp, VTONULL(vp)->null_lowervp);
 	return (0);
 }