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| author | YOSHIFUJI Hideaki / 吉藤英明 <yoshfuji@linux-ipv6.org> | 2013-01-20 11:38:52 +0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2013-01-21 07:29:49 +0400 |
| commit | d1641565f6926c2e9f5859d81bc6f72fc0e1ad76 (patch) | |
| tree | fa5f134b9f5faa2413c439019918d0020742c685 /include/net/addrconf.h | |
| parent | 9d1007740041613bae8492be092932a3f0eb1ebf (diff) | |
| download | linux-d1641565f6926c2e9f5859d81bc6f72fc0e1ad76.tar.xz | |
ipv6: Optimize ipv6_addr_is_ll_all_{nodes,routers}().
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net/addrconf.h')
| -rw-r--r-- | include/net/addrconf.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/include/net/addrconf.h b/include/net/addrconf.h index 9dc5efc3b0d6..6c58d507123f 100644 --- a/include/net/addrconf.h +++ b/include/net/addrconf.h @@ -288,16 +288,26 @@ static inline bool ipv6_addr_is_multicast(const struct in6_addr *addr) static inline bool ipv6_addr_is_ll_all_nodes(const struct in6_addr *addr) { +#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(1))) == 0UL; +#else return ((addr->s6_addr32[0] ^ htonl(0xff020000)) | addr->s6_addr32[1] | addr->s6_addr32[2] | (addr->s6_addr32[3] ^ htonl(0x00000001))) == 0; +#endif } static inline bool ipv6_addr_is_ll_all_routers(const struct in6_addr *addr) { +#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(2))) == 0UL; +#else return ((addr->s6_addr32[0] ^ htonl(0xff020000)) | addr->s6_addr32[1] | addr->s6_addr32[2] | (addr->s6_addr32[3] ^ htonl(0x00000002))) == 0; +#endif } static inline bool ipv6_addr_is_isatap(const struct in6_addr *addr) |