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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>
This commit is contained in:
YOSHIFUJI Hideaki / 吉藤英明 2013-01-20 07:39:07 +00:00 committed by David S. Miller
parent ca97a644d7
commit 9d10077400
1 changed files with 11 additions and 4 deletions
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15
include/net/addrconf.h
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@ -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