From owner-p4-projects@FreeBSD.ORG  Tue Jul 19 22:03:24 2005
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 83DA516A421; Tue, 19 Jul 2005 22:03:24 +0000 (GMT)
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 6028916A41F
	for <perforce@freebsd.org>; Tue, 19 Jul 2005 22:03:24 +0000 (GMT)
	(envelope-from sam@freebsd.org)
Received: from repoman.freebsd.org (repoman.freebsd.org [216.136.204.115])
	by mx1.FreeBSD.org (Postfix) with ESMTP id 32AF043D46
	for <perforce@freebsd.org>; Tue, 19 Jul 2005 22:03:24 +0000 (GMT)
	(envelope-from sam@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 j6JM3Oi0093027
	for <perforce@freebsd.org>; Tue, 19 Jul 2005 22:03:24 GMT
	(envelope-from sam@freebsd.org)
Received: (from perforce@localhost)
	by repoman.freebsd.org (8.13.1/8.13.1/Submit) id j6JM3NaI093024
	for perforce@freebsd.org; Tue, 19 Jul 2005 22:03:23 GMT
	(envelope-from sam@freebsd.org)
Date: Tue, 19 Jul 2005 22:03:23 GMT
Message-Id: <200507192203.j6JM3NaI093024@repoman.freebsd.org>
X-Authentication-Warning: repoman.freebsd.org: perforce set sender to
	sam@freebsd.org using -f
From: Sam Leffler <sam@FreeBSD.org>
To: Perforce Change Reviews <perforce@freebsd.org>
Cc: 
Subject: PERFORCE change 80557 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: Tue, 19 Jul 2005 22:03:25 -0000

http://perforce.freebsd.org/chv.cgi?CH=80557

Change 80557 by sam@sam_ebb on 2005/07/19 22:03:05

	add m_align; a function that aligns an arbitrary mbuf

Affected files ...

.. //depot/projects/wifi/sys/kern/uipc_mbuf.c#11 edit
.. //depot/projects/wifi/sys/sys/mbuf.h#11 edit

Differences ...

==== //depot/projects/wifi/sys/kern/uipc_mbuf.c#11 (text+ko) ====

@@ -1382,3 +1382,22 @@
 		m_freem(m_final);
 	return (NULL);
 }
+
+/*
+ * Set the m_data pointer of a newly-allocated mbuf
+ * to place an object of the specified size at the
+ * end of the mbuf, longword aligned.
+ */
+void
+m_align(struct mbuf *m, int len)
+{
+	int adjust;
+
+	if (m->m_flags & M_EXT)
+		adjust = m->m_ext.ext_size - len;
+	else if (m->m_flags & M_PKTHDR)
+		adjust = MHLEN - len;
+	else
+		adjust = MLEN - len;
+	m->m_data += adjust &~ (sizeof(long)-1);
+}

==== //depot/projects/wifi/sys/sys/mbuf.h#11 (text+ko) ====

@@ -562,6 +562,7 @@
 
 struct uio;
 
+void		 m_align(struct mbuf *, int);
 void		 m_adj(struct mbuf *, int);
 int		 m_apply(struct mbuf *, int, int,
 		    int (*)(void *, void *, u_int), void *);