From 9d1007740041613bae8492be092932a3f0eb1ebf Mon Sep 17 00:00:00 2001 From: =?utf8?q?YOSHIFUJI=20Hideaki=20/=20=E5=90=89=E8=97=A4=E8=8B=B1?= =?utf8?q?=E6=98=8E?= Date: Sun, 20 Jan 2013 07:39:07 +0000 Subject: [PATCH] ipv6: Optimize ipv6_addr_is_solict_mult(). Signed-off-by: YOSHIFUJI Hideaki Signed-off-by: David S. Miller --- include/net/addrconf.h | 15 +++++++++++---- 1 file changed, 11 insertions(+), 4 deletions(-) diff --git a/include/net/addrconf.h b/include/net/addrconf.h index 3a3eeb407f4b..9dc5efc3b0d6 100644 --- a/include/net/addrconf.h +++ b/include/net/addrconf.h @@ -307,10 +307,17 @@ static inline bool ipv6_addr_is_isatap(const struct in6_addr *addr) static inline bool ipv6_addr_is_solict_mult(const struct in6_addr *addr) { - return (addr->s6_addr32[0] == htonl(0xff020000) && - addr->s6_addr32[1] == htonl(0x00000000) && - addr->s6_addr32[2] == htonl(0x00000001) && - addr->s6_addr[12] == 0xff); +#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 + __u64 *p = (__u64 *)addr; + return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) | + ((p[1] ^ cpu_to_be64(0x00000001ff000000UL)) & + cpu_to_be64(0xffffffffff000000UL))) == 0UL; +#else + return ((addr->s6_addr32[0] ^ htonl(0xff020000)) | + addr->s6_addr32[1] | + (addr->s6_addr32[2] ^ htonl(0x00000001)) | + (addr->s6_addr[12] ^ 0xff)) == 0; +#endif } #ifdef CONFIG_PROC_FS -- 2.30.2