diff -r 000000000000 -r 68f95e015346 usr/src/lib/libc/port/gen/munlock.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/usr/src/lib/libc/port/gen/munlock.c	Tue Jun 14 00:00:00 2005 -0700
@@ -0,0 +1,47 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License, Version 1.0 only
+ * (the "License").  You may not use this file except in compliance
+ * with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#pragma ident	"%Z%%M%	%I%	%E% SMI"
+
+/*	Copyright (c) 1988 AT&T	*/
+/*	  All Rights Reserved  	*/
+
+
+#pragma weak munlock = _munlock
+
+#include "synonyms.h"
+#include <sys/types.h>
+#include <sys/mman.h>
+
+/*
+ * Function to unlock address range from memory.
+ */
+
+int
+munlock(caddr_t addr, size_t len)
+{
+	return (memcntl(addr, len, MC_UNLOCK, 0, 0, 0));
+}