From owner-svn-src-stable-8@FreeBSD.ORG  Thu Jul  8 21:02:32 2010
Return-Path: <owner-svn-src-stable-8@FreeBSD.ORG>
Delivered-To: svn-src-stable-8@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id 880F0106564A;
	Thu,  8 Jul 2010 21:02:32 +0000 (UTC) (envelope-from avg@FreeBSD.org)
Received: from svn.freebsd.org (svn.freebsd.org [IPv6:2001:4f8:fff6::2c])
	by mx1.freebsd.org (Postfix) with ESMTP id 762638FC12;
	Thu,  8 Jul 2010 21:02:32 +0000 (UTC)
Received: from svn.freebsd.org (localhost [127.0.0.1])
	by svn.freebsd.org (8.14.3/8.14.3) with ESMTP id o68L2WGM026588;
	Thu, 8 Jul 2010 21:02:32 GMT (envelope-from avg@svn.freebsd.org)
Received: (from avg@localhost)
	by svn.freebsd.org (8.14.3/8.14.3/Submit) id o68L2WSR026586;
	Thu, 8 Jul 2010 21:02:32 GMT (envelope-from avg@svn.freebsd.org)
Message-Id: <201007082102.o68L2WSR026586@svn.freebsd.org>
From: Andriy Gapon <avg@FreeBSD.org>
Date: Thu, 8 Jul 2010 21:02:32 +0000 (UTC)
To: src-committers@freebsd.org, svn-src-all@freebsd.org,
	svn-src-stable@freebsd.org, svn-src-stable-8@freebsd.org
X-SVN-Group: stable-8
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Cc: 
Subject: svn commit: r209831 - stable/8/sys/kern
X-BeenThere: svn-src-stable-8@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: SVN commit messages for only the 8-stable src tree
	<svn-src-stable-8.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/svn-src-stable-8>, 
	<mailto:svn-src-stable-8-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/svn-src-stable-8>
List-Post: <mailto:svn-src-stable-8@freebsd.org>
List-Help: <mailto:svn-src-stable-8-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/svn-src-stable-8>, 
	<mailto:svn-src-stable-8-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Thu, 08 Jul 2010 21:02:32 -0000

Author: avg
Date: Thu Jul  8 21:02:31 2010
New Revision: 209831
URL: http://svn.freebsd.org/changeset/base/209831

Log:
  MFC r209247: lock_profile_release_lock: do not compare unsigned with zero
  
  Note: no MFC to stable/7

Modified:
  stable/8/sys/kern/subr_lock.c
Directory Properties:
  stable/8/sys/   (props changed)
  stable/8/sys/amd64/include/xen/   (props changed)
  stable/8/sys/cddl/contrib/opensolaris/   (props changed)
  stable/8/sys/contrib/dev/acpica/   (props changed)
  stable/8/sys/contrib/pf/   (props changed)
  stable/8/sys/dev/xen/xenpci/   (props changed)

Modified: stable/8/sys/kern/subr_lock.c
==============================================================================
--- stable/8/sys/kern/subr_lock.c	Thu Jul  8 20:57:37 2010	(r209830)
+++ stable/8/sys/kern/subr_lock.c	Thu Jul  8 21:02:31 2010	(r209831)
@@ -600,7 +600,7 @@ lock_profile_release_lock(struct lock_ob
 	struct lock_profile_object *l;
 	struct lock_prof_type *type;
 	struct lock_prof *lp;
-	u_int64_t holdtime;
+	u_int64_t curtime, holdtime;
 	struct lpohead *head;
 	int spin;
 
@@ -628,9 +628,11 @@ lock_profile_release_lock(struct lock_ob
 	lp = lock_profile_lookup(lo, spin, l->lpo_file, l->lpo_line);
 	if (lp == NULL)
 		goto release;
-	holdtime = nanoseconds() - l->lpo_acqtime;
-	if (holdtime < 0)
+	curtime = nanoseconds();
+	if (curtime < l->lpo_acqtime)
 		goto release;
+	holdtime = curtime - l->lpo_acqtime;
+
 	/*
 	 * Record if the lock has been held longer now than ever
 	 * before.