From owner-p4-projects@FreeBSD.ORG  Thu Apr 27 00:16:56 2006
Return-Path: <owner-p4-projects@FreeBSD.ORG>
X-Original-To: p4-projects@freebsd.org
Delivered-To: p4-projects@freebsd.org
Received: by hub.freebsd.org (Postfix, from userid 32767)
	id 9FD3716A405; Thu, 27 Apr 2006 00:16:56 +0000 (UTC)
X-Original-To: perforce@freebsd.org
Delivered-To: perforce@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP id 671F516A400
	for <perforce@freebsd.org>; Thu, 27 Apr 2006 00:16:56 +0000 (UTC)
	(envelope-from jb@freebsd.org)
Received: from repoman.freebsd.org (repoman.freebsd.org [216.136.204.115])
	by mx1.FreeBSD.org (Postfix) with ESMTP id 37ADE43D45
	for <perforce@freebsd.org>; Thu, 27 Apr 2006 00:16:56 +0000 (GMT)
	(envelope-from jb@freebsd.org)
Received: from repoman.freebsd.org (localhost [127.0.0.1])
	by repoman.freebsd.org (8.13.1/8.13.1) with ESMTP id k3R0GuXv049063
	for <perforce@freebsd.org>; Thu, 27 Apr 2006 00:16:56 GMT
	(envelope-from jb@freebsd.org)
Received: (from perforce@localhost)
	by repoman.freebsd.org (8.13.1/8.13.1/Submit) id k3R0GtUB049056
	for perforce@freebsd.org; Thu, 27 Apr 2006 00:16:55 GMT
	(envelope-from jb@freebsd.org)
Date: Thu, 27 Apr 2006 00:16:55 GMT
Message-Id: <200604270016.k3R0GtUB049056@repoman.freebsd.org>
X-Authentication-Warning: repoman.freebsd.org: perforce set sender to
	jb@freebsd.org using -f
From: John Birrell <jb@FreeBSD.org>
To: Perforce Change Reviews <perforce@freebsd.org>
Cc: 
Subject: PERFORCE change 96174 for review
X-BeenThere: p4-projects@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: p4 projects tree changes <p4-projects.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/p4-projects>,
	<mailto:p4-projects-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/p4-projects>
List-Post: <mailto:p4-projects@freebsd.org>
List-Help: <mailto:p4-projects-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/p4-projects>,
	<mailto:p4-projects-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Thu, 27 Apr 2006 00:16:56 -0000

http://perforce.freebsd.org/chv.cgi?CH=96174

Change 96174 by jb@jb_freebsd2 on 2006/04/27 00:16:37

	This is a hack for a function which should be in assembler.
	Check-and-set.

Affected files ...

.. //depot/projects/dtrace/src/sys/cddl/dev/dtrace/dtrace_hacks.c#8 edit

Differences ...

==== //depot/projects/dtrace/src/sys/cddl/dev/dtrace/dtrace_hacks.c#8 (text+ko) ====

@@ -147,10 +147,14 @@
 	vprintf(fmt,args);
 }
 uint32_t
-dtrace_cas32(uint32_t *a, uint32_t b, uint32_t c)
+dtrace_cas32(uint32_t *target, uint32_t cmp, uint32_t new)
 {
-	printf("%s:\n",__FUNCTION__);
-	return 0;
+        uint32_t old;
+
+        if ((old = *target) == cmp)
+                *target = new;
+        return (old);
+
 }
 void *dtrace_casptr(void *a, void *b, void *c)
 {