ipv6: Optimize ipv6_addr_is_ll_all_{nodes,routers}().

Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 10 insertions, 0 deletions

diff --git a/include/net/addrconf.h b/include/net/addrconf.h
index 9dc5efc3b0d6..6c58d507123f 100644
--- a/include/net/addrconf.h
+++ b/include/net/addrconf.h
@@ -288,16 +288,26 @@ static inline bool ipv6_addr_is_multicast(const struct in6_addr *addr)
 
 static inline bool ipv6_addr_is_ll_all_nodes(const struct in6_addr *addr)
 {
+#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
+        __u64 *p = (__u64 *)addr;
+        return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) | (p[1] ^ cpu_to_be64(1))) == 0UL;
+#else
         return ((addr->s6_addr32[0] ^ htonl(0xff020000)) |
                 addr->s6_addr32[1] | addr->s6_addr32[2] |
                 (addr->s6_addr32[3] ^ htonl(0x00000001))) == 0;
+#endif
 }
 
 static inline bool ipv6_addr_is_ll_all_routers(const struct in6_addr *addr)
 {
+#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
+        __u64 *p = (__u64 *)addr;
+        return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) | (p[1] ^ cpu_to_be64(2))) == 0UL;
+#else
         return ((addr->s6_addr32[0] ^ htonl(0xff020000)) |
                 addr->s6_addr32[1] | addr->s6_addr32[2] |
                 (addr->s6_addr32[3] ^ htonl(0x00000002))) == 0;
+#endif
 }
 
 static inline bool ipv6_addr_is_isatap(const struct in6_addr *addr)