aboutsummaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
-rw-r--r--include/linux/etherdevice.h24
-rw-r--r--net/ethernet/eth.c2
2 files changed, 24 insertions, 2 deletions
diff --git a/include/linux/etherdevice.h b/include/linux/etherdevice.h
index 606563ef8a72..c4a10f991fe0 100644
--- a/include/linux/etherdevice.h
+++ b/include/linux/etherdevice.h
@@ -110,7 +110,29 @@ static inline bool is_zero_ether_addr(const u8 *addr)
*/
static inline bool is_multicast_ether_addr(const u8 *addr)
{
- return 0x01 & addr[0];
+#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS)
+ u32 a = *(const u32 *)addr;
+#else
+ u16 a = *(const u16 *)addr;
+#endif
+#ifdef __BIG_ENDIAN
+ return 0x01 & (a >> ((sizeof(a) * 8) - 8));
+#else
+ return 0x01 & a;
+#endif
+}
+
+static inline bool is_multicast_ether_addr_64bits(const u8 addr[6+2])
+{
+#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
+#ifdef __BIG_ENDIAN
+ return 0x01 & ((*(const u64 *)addr) >> 56);
+#else
+ return 0x01 & (*(const u64 *)addr);
+#endif
+#else
+ return is_multicast_ether_addr(addr);
+#endif
}
/**
diff --git a/net/ethernet/eth.c b/net/ethernet/eth.c
index 60069318d5d1..21c211e9fd5a 100644
--- a/net/ethernet/eth.c
+++ b/net/ethernet/eth.c
@@ -159,7 +159,7 @@ __be16 eth_type_trans(struct sk_buff *skb, struct net_device *dev)
skb_pull_inline(skb, ETH_HLEN);
eth = eth_hdr(skb);
- if (unlikely(is_multicast_ether_addr(eth->h_dest))) {
+ if (unlikely(is_multicast_ether_addr_64bits(eth->h_dest))) {
if (ether_addr_equal_64bits(eth->h_dest, dev->broadcast))
skb->pkt_type = PACKET_BROADCAST;
else

Privacy Policy