From patchwork Mon Jan 14 17:10:06 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: 211843 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 8C60B2C009C for ; Tue, 15 Jan 2013 04:10:15 +1100 (EST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757681Ab3ANRKI (ORCPT ); Mon, 14 Jan 2013 12:10:08 -0500 Received: from 94.43.138.210.xn.2iij.net ([210.138.43.94]:39835 "EHLO mail.st-paulia.net" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1757241Ab3ANRKI (ORCPT ); Mon, 14 Jan 2013 12:10:08 -0500 Received: from [192.168.2.160] (unknown [192.168.2.160]) by mail.st-paulia.net (Postfix) with ESMTPSA id 3B7731BDBF; Tue, 15 Jan 2013 02:10:07 +0900 (JST) Message-ID: <50F43BEE.1070608@linux-ipv6.org> Date: Tue, 15 Jan 2013 02:10:06 +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 2/6] ipv6: 64bit version of ipv6_addr_loopback(). 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 | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/include/net/ipv6.h b/include/net/ipv6.h index ace1113..c5049b0 100644 --- a/include/net/ipv6.h +++ b/include/net/ipv6.h @@ -475,8 +475,14 @@ static inline u32 ipv6_addr_hash(const struct in6_addr *a) static inline bool ipv6_addr_loopback(const struct in6_addr *a) { +#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 + const unsigned long *ul = (const unsigned long *)a; + + return (ul[0] | (ul[1] ^ cpu_to_be64(1))) == 0UL; +#else return (a->s6_addr32[0] | a->s6_addr32[1] | a->s6_addr32[2] | (a->s6_addr32[3] ^ htonl(1))) == 0; +#endif } static inline bool ipv6_addr_v4mapped(const struct in6_addr *a)