From owner-svn-src-head@FreeBSD.ORG  Wed Oct 27 02:32:54 2010
Return-Path: <owner-svn-src-head@FreeBSD.ORG>
Delivered-To: svn-src-head@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id 88D29106564A;
	Wed, 27 Oct 2010 02:32:54 +0000 (UTC)
	(envelope-from davidxu@FreeBSD.org)
Received: from svn.freebsd.org (svn.freebsd.org [IPv6:2001:4f8:fff6::2c])
	by mx1.freebsd.org (Postfix) with ESMTP id 77FAA8FC1C;
	Wed, 27 Oct 2010 02:32:54 +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 o9R2Wsco084555;
	Wed, 27 Oct 2010 02:32:54 GMT (envelope-from davidxu@svn.freebsd.org)
Received: (from davidxu@localhost)
	by svn.freebsd.org (8.14.3/8.14.3/Submit) id o9R2Wsu3084553;
	Wed, 27 Oct 2010 02:32:54 GMT (envelope-from davidxu@svn.freebsd.org)
Message-Id: <201010270232.o9R2Wsu3084553@svn.freebsd.org>
From: David Xu <davidxu@FreeBSD.org>
Date: Wed, 27 Oct 2010 02:32:54 +0000 (UTC)
To: src-committers@freebsd.org, svn-src-all@freebsd.org,
	svn-src-head@freebsd.org
X-SVN-Group: head
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Cc: 
Subject: svn commit: r214409 - head/sys/kern
X-BeenThere: svn-src-head@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: SVN commit messages for the src tree for head/-current
	<svn-src-head.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/svn-src-head>,
	<mailto:svn-src-head-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/svn-src-head>
List-Post: <mailto:svn-src-head@freebsd.org>
List-Help: <mailto:svn-src-head-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/svn-src-head>,
	<mailto:svn-src-head-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Wed, 27 Oct 2010 02:32:54 -0000

Author: davidxu
Date: Wed Oct 27 02:32:54 2010
New Revision: 214409
URL: http://svn.freebsd.org/changeset/base/214409

Log:
  If input parameter cpusetsize is zero, give userland size of cpuset mask
  kernel is using.

Modified:
  head/sys/kern/kern_cpuset.c

Modified: head/sys/kern/kern_cpuset.c
==============================================================================
--- head/sys/kern/kern_cpuset.c	Wed Oct 27 02:07:25 2010	(r214408)
+++ head/sys/kern/kern_cpuset.c	Wed Oct 27 02:32:54 2010	(r214409)
@@ -889,6 +889,10 @@ cpuset_getaffinity(struct thread *td, st
 	int error;
 	size_t size;
 
+	if (uap->cpusetsize == 0) {
+		td->td_retval[0] = sizeof(cpuset_t);
+		return (0);
+	}
 	if (uap->cpusetsize < sizeof(cpuset_t) ||
 	    uap->cpusetsize > CPU_MAXSIZE / NBBY)
 		return (ERANGE);