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ipv6: 64bit version of ipv6_addr_v4mapped().

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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 2013-01-14 07:10:14 +00:00 committed by David S. Miller
parent e287656b36
commit a04d40b895
1 changed files with 7 additions and 2 deletions
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9
include/net/ipv6.h
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@ -487,8 +487,13 @@ static inline bool ipv6_addr_loopback(const struct in6_addr *a)
static inline bool ipv6_addr_v4mapped(const struct in6_addr *a)
{
return (a->s6_addr32[0] | a->s6_addr32[1] |
(a->s6_addr32[2] ^ htonl(0x0000ffff))) == 0;
return (
#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
*(__be64 *)a |
#else
(a->s6_addr32[0] | a->s6_addr32[1]) |
#endif
(a->s6_addr32[2] ^ htonl(0x0000ffff))) == 0UL;
}
/*