[PATCH 2/6] ipv6: 64bit version of ipv6_addr_loopback().
From: YOSHIFUJI Hideaki <hidden>
Date: 2013-01-14 17:10:08
Subsystem:
networking [general], networking [ipv4/ipv6], the rest · Maintainers:
"David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, David Ahern, Ido Schimmel, Linus Torvalds
Signed-off-by: YOSHIFUJI Hideaki <redacted> --- include/net/ipv6.h | 6 ++++++ 1 file changed, 6 insertions(+)
diff --git a/include/net/ipv6.h b/include/net/ipv6.h
index ace1113..c5049b0 100644
--- a/include/net/ipv6.h
+++ b/include/net/ipv6.h@@ -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)
--
1.7.9.5