[src/trunk]: src/sys/net Use MH_ALIGN instead, ok knakahara@.

[maxv <maxv%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/bd547bcc9cf8
branches:  trunk
changeset: 359039:bd547bcc9cf8
user:      maxv <maxv%NetBSD.org@localhost>
date:      Fri Jan 26 14:10:15 2018 +0000

description:
Use MH_ALIGN instead, ok knakahara@.

diffstat:

 sys/net/if_l2tp.c |  7 +++----
 1 files changed, 3 insertions(+), 4 deletions(-)

diffs (35 lines):

diff -r ceb4e3b097e7 -r bd547bcc9cf8 sys/net/if_l2tp.c
--- a/sys/net/if_l2tp.c Fri Jan 26 11:06:32 2018 +0000
+++ b/sys/net/if_l2tp.c Fri Jan 26 14:10:15 2018 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: if_l2tp.c,v 1.19 2018/01/26 07:49:15 maxv Exp $        */
+/*     $NetBSD: if_l2tp.c,v 1.20 2018/01/26 14:10:15 maxv Exp $        */
 
 /*
  * Copyright (c) 2017 Internet Initiative Japan Inc.
@@ -31,7 +31,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: if_l2tp.c,v 1.19 2018/01/26 07:49:15 maxv Exp $");
+__KERNEL_RCSID(0, "$NetBSD: if_l2tp.c,v 1.20 2018/01/26 14:10:15 maxv Exp $");
 
 #ifdef _KERNEL_OPT
 #include "opt_inet.h"
@@ -482,7 +482,6 @@
                int copy_length;
 
 #define L2TP_COPY_LENGTH               60
-#define L2TP_LINK_HDR_ROOM     (MHLEN - L2TP_COPY_LENGTH - 4/*round4(2)*/)
 
                if (m->m_pkthdr.len < L2TP_COPY_LENGTH) {
                        copy_length = m->m_pkthdr.len;
@@ -503,7 +502,7 @@
                }
                M_COPY_PKTHDR(m_head, m);
 
-               m_head->m_data += 2 /* align */ + L2TP_LINK_HDR_ROOM;
+               MH_ALIGN(m_head, L2TP_COPY_LENGTH);
                memcpy(mtod(m_head, void *), mtod(m, void *), copy_length);
                m_head->m_len = copy_length;
                m->m_data += copy_length;