From mboxrd@z Thu Jan 1 00:00:00 1970 From: YOSHIFUJI Hideaki Subject: [PATCH 2/6] ipv6: 64bit version of ipv6_addr_loopback(). Date: Tue, 15 Jan 2013 02:10:06 +0900 Message-ID: <50F43BEE.1070608@linux-ipv6.org> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-2022-JP Content-Transfer-Encoding: 7bit Cc: yoshfuji@linux-ipv6.org To: davem@davemloft.net, netdev@vger.kernel.org Return-path: 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 Sender: netdev-owner@vger.kernel.org List-ID: 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) -- 1.7.9.5