diff options
| -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 c5049b01933..77cef332157 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; } /* |