diff options
| -rw-r--r-- | net/bridge/br_input.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/net/bridge/br_input.c b/net/bridge/br_input.c index 35b94f9a1ac..a260679afad 100644 --- a/net/bridge/br_input.c +++ b/net/bridge/br_input.c @@ -112,7 +112,11 @@ static int br_handle_local_finish(struct sk_buff *skb) */ static inline int is_link_local(const unsigned char *dest) { - return memcmp(dest, br_group_address, 5) == 0 && (dest[5] & 0xf0) == 0; + const u16 *a = (const u16 *) dest; + static const u16 *const b = (const u16 *const ) br_group_address; + static const u16 m = __constant_cpu_to_be16(0xfff0); + + return ((a[0] ^ b[0]) | (a[1] ^ b[1]) | ((a[2] ^ b[2]) & m)) == 0; } /* |