From: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
To: davem@davemloft.net, netdev@vger.kernel.org
Cc: yoshfuji@linux-ipv6.org
Subject: [PATCH 3/6] ipv6: 64bit version of ipv6_addr_v4mapped().
Date: Tue, 15 Jan 2013 02:10:14 +0900 [thread overview]
Message-ID: <50F43BF6.4050301@linux-ipv6.org> (raw)
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
---
include/net/ipv6.h | 9 +++++++--
1 file changed, 7 insertions(+), 2 deletions(-)
diff --git a/include/net/ipv6.h b/include/net/ipv6.h
index c5049b0..77cef332 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;
}
/*
--
1.7.9.5
reply other threads:[~2013-01-14 17:10 UTC|newest]
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