[src/trunk]: src/external/cddl/osnet/sys/sys Hack: Instead of dying in vrele ...

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

details:   https://anonhg.NetBSD.org/src/rev/68b911f64355
branches:  trunk
changeset: 790177:68b911f64355
user:      christos <christos%NetBSD.org@localhost>
date:      Mon Sep 23 19:44:21 2013 +0000

description:
Hack: Instead of dying in vrele with a kernel assertion, detect that the
usecount of the vnode is 0 and treat it as a noop. This is wrong, buf it
get us through the VN_RELE() after the close in vdev_file.c

diffstat:

 external/cddl/osnet/sys/sys/vnode.h |  9 +++++++--
 1 files changed, 7 insertions(+), 2 deletions(-)

diffs (24 lines):

diff -r 7fea7437a6b0 -r 68b911f64355 external/cddl/osnet/sys/sys/vnode.h
--- a/external/cddl/osnet/sys/sys/vnode.h       Mon Sep 23 19:42:42 2013 +0000
+++ b/external/cddl/osnet/sys/sys/vnode.h       Mon Sep 23 19:44:21 2013 +0000
@@ -1,5 +1,5 @@
 
-/*     $NetBSD: vnode.h,v 1.9 2011/06/12 04:43:11 mrg Exp $    */
+/*     $NetBSD: vnode.h,v 1.10 2013/09/23 19:44:21 christos Exp $      */
 
 /*
  * CDDL HEADER START
@@ -294,7 +294,12 @@
 #define vn_renamepath(tdvp, svp, tnm, lentnm)   do { } while (0)
 
 #define        VN_HOLD(v)      vref(v)
-#define        VN_RELE(v)      vrele(v)
+#define        VN_RELE(v)      do { \
+           if ((v)->v_usecount == 0) \
+                   printf("%s, %d: %p unused\n", __FILE__, __LINE__, v); \
+           else \
+                   vrele(v); \
+    } while (/*CONSTCOND*/0)
 #define        VN_URELE(v)     vput(v)
 #define        VN_SET_VFS_TYPE_DEV(vp, vfs, type, flag)        (0)