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authorYOSHIFUJI Hideaki / 吉藤英明 <yoshfuji@linux-ipv6.org>2013-01-20 07:39:07 +0000
committerDavid S. Miller <davem@davemloft.net>2013-01-20 22:29:49 -0500
commit9d1007740041613bae8492be092932a3f0eb1ebf (patch)
treee6032ef5ab4ec9ea33bad69043613ddfab0430f2 /include/net/addrconf.h
parentca97a644d752b46e5e08526e36705c3b0dd03f5f (diff)
ipv6: Optimize ipv6_addr_is_solict_mult().
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net/addrconf.h')
-rw-r--r--include/net/addrconf.h15
1 files changed, 11 insertions, 4 deletions
diff --git a/include/net/addrconf.h b/include/net/addrconf.h
index 3a3eeb407f4b..9dc5efc3b0d6 100644
--- a/include/net/addrconf.h
+++ b/include/net/addrconf.h
@@ -307,10 +307,17 @@ static inline bool ipv6_addr_is_isatap(const struct in6_addr *addr)
static inline bool ipv6_addr_is_solict_mult(const struct in6_addr *addr)
{
- return (addr->s6_addr32[0] == htonl(0xff020000) &&
- addr->s6_addr32[1] == htonl(0x00000000) &&
- addr->s6_addr32[2] == htonl(0x00000001) &&
- addr->s6_addr[12] == 0xff);
+#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(0x00000001ff000000UL)) &
+ cpu_to_be64(0xffffffffff000000UL))) == 0UL;
+#else
+ return ((addr->s6_addr32[0] ^ htonl(0xff020000)) |
+ addr->s6_addr32[1] |
+ (addr->s6_addr32[2] ^ htonl(0x00000001)) |
+ (addr->s6_addr[12] ^ 0xff)) == 0;
+#endif
}
#ifdef CONFIG_PROC_FS