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authorYOSHIFUJI Hideaki / 吉藤英明 <yoshfuji@linux-ipv6.org>2013-01-14 07:10:06 +0000
committerDavid S. Miller <davem@davemloft.net>2013-01-14 13:17:00 -0500
commite287656b365f8db4486371c76ea54cbdbed7129c (patch)
tree9a324f88d4a1dc84843052a3f6c14800a533a5b8 /include/net/ipv6.h
parent9f2e73345ad9466618edfec35d98c074f2e0570d (diff)
ipv6: 64bit version of ipv6_addr_loopback().
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.h6
1 files changed, 6 insertions, 0 deletions
diff --git a/include/net/ipv6.h b/include/net/ipv6.h
index ace1113bef85..c5049b019332 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)