ipv6: 64bit version of ipv6_addr_v4mapped().
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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_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;
}
/*