diff options
| author | YOSHIFUJI Hideaki / 吉藤英明 <yoshfuji@linux-ipv6.org> | 2013-01-14 07:10:14 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2013-01-14 13:17:00 -0500 |
| commit | a04d40b8956010d2a6a7abc9254792c8f8649242 (patch) | |
| tree | 29cafcaaa8ed96a4048a0feb1ca863f35b54d503 /include/net/ipv6.h | |
| parent | e287656b365f8db4486371c76ea54cbdbed7129c (diff) | |
ipv6: 64bit version of ipv6_addr_v4mapped().
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net/ipv6.h')
| -rw-r--r-- | include/net/ipv6.h | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/include/net/ipv6.h b/include/net/ipv6.h index c5049b019332..77cef3321571 100644 --- a/include/net/ipv6.h +++ b/include/net/ipv6.h @@ -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; } /* |