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vn_lock: add an assertion about usecount.

This commit is contained in:
yamt 2004-05-31 09:02:51 +00:00
parent 97c923cdc2
commit bd2a784b57
1 changed files with 5 additions and 2 deletions
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7
sys/kern/vfs_vnops.c
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@ -1,4 +1,4 @@
/* $NetBSD: vfs_vnops.c,v 1.79 2004/05/30 20:48:04 yamt Exp $ */ /* $NetBSD: vfs_vnops.c,v 1.80 2004/05/31 09:02:51 yamt Exp $ */
/* /*
* Copyright (c) 1982, 1986, 1989, 1993 * Copyright (c) 1982, 1986, 1989, 1993
@ -37,7 +37,7 @@
*/ */
#include <sys/cdefs.h> #include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: vfs_vnops.c,v 1.79 2004/05/30 20:48:04 yamt Exp $"); __KERNEL_RCSID(0, "$NetBSD: vfs_vnops.c,v 1.80 2004/05/31 09:02:51 yamt Exp $");
#include "fs_union.h" #include "fs_union.h"
@ -766,6 +766,9 @@ vn_lock(vp, flags)
{ {
int error; int error;
KASSERT(vp->v_usecount > 0 || (flags & LK_INTERLOCK) != 0
|| (vp->v_flag & VONWORKLST) != 0);
do { do {
if ((flags & LK_INTERLOCK) == 0) if ((flags & LK_INTERLOCK) == 0)
simple_lock(&vp->v_interlock); simple_lock(&vp->v_interlock);