ipv6: Optimize ipv6_addr_is_ll_all_{nodes,routers}().
authorYOSHIFUJI Hideaki / 吉藤英明 <yoshfuji@linux-ipv6.org>
Sun, 20 Jan 2013 07:38:52 +0000 (07:38 +0000)
committerDavid S. Miller <davem@davemloft.net>
Mon, 21 Jan 2013 03:29:49 +0000 (22:29 -0500)
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
include/net/addrconf.h

index 9dc5efc3b0d6925cb7ff2b91e06f9ed83d926555..6c58d507123fbf1370942143aaf151fcf17e4394 100644 (file)
@@ -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)