* [PATCH 2/6] ipv6: 64bit version of ipv6_addr_loopback().
@ 2013-01-14 17:10 YOSHIFUJI Hideaki
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From: YOSHIFUJI Hideaki @ 2013-01-14 17:10 UTC (permalink / raw)
To: davem, netdev; +Cc: yoshfuji
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
---
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
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2013-01-14 17:10 [PATCH 2/6] ipv6: 64bit version of ipv6_addr_loopback() YOSHIFUJI Hideaki
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