Re: [PATCH net-next 19/20] net: plip: slight optimization of addr compare

Ding Tianhong
2013-12-28T05:05:49Z

On 2013/12/27 23:48, Eric Dumazet wrote:
> On Fri, 2013-12-27 at 14:49 +0800, Ding Tianhong wrote:
>> Use possibly more efficient ether_addr_equal
>> to instead of memcmp.
>>
>> Cc: "David S. Miller" <davem@davemloft.net>
>> Signed-off-by: Ding Tianhong <dingtianhong@huawei.com>
>> ---
>> drivers/net/plip/plip.c | 2 +-
>> 1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/drivers/net/plip/plip.c b/drivers/net/plip/plip.c
>> index 7b4ff35..26614df 100644
>> --- a/drivers/net/plip/plip.c
>> +++ b/drivers/net/plip/plip.c
>> @@ -549,7 +549,7 @@ static __be16 plip_type_trans(struct sk_buff *skb, struct net_device *dev)
>>
>> if(*eth->h_dest&1)
>> {
>> - if(memcmp(eth->h_dest,dev->broadcast, ETH_ALEN)==0)
>> + if(ether_addr_equal(eth->h_dest, dev->broadcast))
>> skb->pkt_type=PACKET_BROADCAST;
>> else
>> skb->pkt_type=PACKET_MULTICAST;
>
> What about :
>
> if (is_multicast_ether_addr(eth->h_dest)) {
> if (ether_addr_equal_64bits(eth->h_dest, dev->broadcast))
> skb->pkt_type = PACKET_BROADCAST;
> else
> skb->pkt_type = PACKET_MULTICAST;
> }
>
>
>
more better, thanks.

Regards
Ding

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