Author: kib
Date: Tue Jan 3 21:03:20 2012
New Revision: 229428
URL: http://svn.freebsd.org/changeset/base/229428
Log:
Document the state of the lowervp vnode for null_nodeget().
Tested by: pho
MFC after: 1 week
Modified:
head/sys/fs/nullfs/null_subr.c
Modified: head/sys/fs/nullfs/null_subr.c
==============================================================================
--- head/sys/fs/nullfs/null_subr.c Tue Jan 3 20:53:58 2012
(r229427)
+++ head/sys/fs/nullfs/null_subr.c Tue Jan 3 21:03:20 2012
(r229428)
@@ -198,6 +198,9 @@ null_nodeget(mp, lowervp, vpp)
struct vnode *vp;
int error;
+ ASSERT_VOP_LOCKED(lowervp, "lowervp");
+ KASSERT(lowervp->v_usecount >= 1, ("Unreferenced vnode %p\n", vp));
+
/* Lookup the hash firstly */
*vpp = null_hashget(mp, lowervp);
if (*vpp != NULL) {
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