From patchwork Mon Jan 14 17:10:14 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: =?utf-8?b?WU9TSElGVUpJIEhpZGVha2kgLyDlkInol6Toi7HmmI4=?= X-Patchwork-Id: 211844 X-Patchwork-Delegate: davem@davemloft.net Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id CF2BA2C009C for ; Tue, 15 Jan 2013 04:10:23 +1100 (EST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757684Ab3ANRKS (ORCPT ); Mon, 14 Jan 2013 12:10:18 -0500 Received: from 94.43.138.210.xn.2iij.net ([210.138.43.94]:39839 "EHLO mail.st-paulia.net" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1757243Ab3ANRKQ (ORCPT ); Mon, 14 Jan 2013 12:10:16 -0500 Received: from [192.168.2.160] (unknown [192.168.2.160]) by mail.st-paulia.net (Postfix) with ESMTPSA id 626B51BDE9; Tue, 15 Jan 2013 02:10:15 +0900 (JST) Message-ID: <50F43BF6.4050301@linux-ipv6.org> Date: Tue, 15 Jan 2013 02:10:14 +0900 From: YOSHIFUJI Hideaki Organization: USAGI Project User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130106 Thunderbird/17.0.2 MIME-Version: 1.0 To: davem@davemloft.net, netdev@vger.kernel.org CC: yoshfuji@linux-ipv6.org Subject: [PATCH 3/6] ipv6: 64bit version of ipv6_addr_v4mapped(). Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Signed-off-by: YOSHIFUJI Hideaki --- include/net/ipv6.h | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/include/net/ipv6.h b/include/net/ipv6.h index c5049b0..77cef332 100644 --- a/include/net/ipv6.h +++ b/include/net/ipv6.h @@ -487,8 +487,13 @@ static inline bool ipv6_addr_loopback(const struct in6_addr *a) static inline bool ipv6_addr_v4mapped(const struct in6_addr *a) { - return (a->s6_addr32[0] | a->s6_addr32[1] | - (a->s6_addr32[2] ^ htonl(0x0000ffff))) == 0; + return ( +#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 + *(__be64 *)a | +#else + (a->s6_addr32[0] | a->s6_addr32[1]) | +#endif + (a->s6_addr32[2] ^ htonl(0x0000ffff))) == 0UL; } /*