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ipv6: 64bit version of ipv6_addr_loopback().

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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 07:10:06 +00:00 committed by David S. Miller
parent 9f2e73345a
commit e287656b36
1 changed files with 6 additions and 0 deletions
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6
include/net/ipv6.h
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@ -475,8 +475,14 @@ static inline u32 ipv6_addr_hash(const struct in6_addr *a)
static inline bool ipv6_addr_loopback(const struct in6_addr *a)
{
#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
const unsigned long *ul = (const unsigned long *)a;
return (ul[0] | (ul[1] ^ cpu_to_be64(1))) == 0UL;
#else
return (a->s6_addr32[0] | a->s6_addr32[1] |
a->s6_addr32[2] | (a->s6_addr32[3] ^ htonl(1))) == 0;
#endif
}
static inline bool ipv6_addr_v4mapped(const struct in6_addr *a)