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| author |   YOSHIFUJI Hideaki / 吉藤英明 <yoshfuji@linux-ipv6.org> | 2013-01-20 07:39:07 +0000 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2013-01-20 22:29:49 -0500 |
| commit | 9d1007740041613bae8492be092932a3f0eb1ebf (patch) | |
| tree | e6032ef5ab4ec9ea33bad69043613ddfab0430f2 /include/net/addrconf.h | |
| parent | ipv6: Introduce ipv6_addr_is_solict_mult() to check Solicited Node Multicast Addresses. (diff) | |
| download | linux-dev-9d1007740041613bae8492be092932a3f0eb1ebf.tar.xz linux-dev-9d1007740041613bae8492be092932a3f0eb1ebf.zip | |
ipv6: Optimize ipv6_addr_is_solict_mult().
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 | 15 |
1 files 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 |