On Mon, 11 Dec 2017 21:26:41 +0800
yuan linyu <cug...@163.com> wrote:
> From: yuan linyu <linyu.y...@alcatel-sbell.com.cn>
>
> Signed-off-by: yuan linyu <linyu.y...@alcatel-sbell.com.cn>
> ---
> drivers/net/tap.c | 6 +-----
> 1 file changed, 1 insertion(+), 5 deletions(-)
>
> diff --git a/drivers/net/tap.c b/drivers/net/tap.c
> index 0a886fda..78900a0 100644
> --- a/drivers/net/tap.c
> +++ b/drivers/net/tap.c
> @@ -275,11 +275,7 @@ static struct tap_queue *tap_get_queue(struct tap_dev
> *tap,
>
> if (likely(skb_rx_queue_recorded(skb))) {
> rxq = skb_get_rx_queue(skb);
> -
> - while (unlikely(rxq >= numvtaps))
> - rxq -= numvtaps;
> -
> - queue = rcu_dereference(tap->taps[rxq]);
> + queue = rcu_dereference(tap->taps[rxq % numvtaps]);
> goto out;
> }
>
Modulus is slower than the loop.
