On Tue, 2007-02-06 at 21:53 +0100, Eric Dumazet wrote:
> Signed-off-by: Eric Dumazet <[EMAIL PROTECTED]>
> plain text document attachment (tg3_avoid_divide.patch)
> --- linux-2.6.20/drivers/net/tg3.c.orig 2007-02-06 22:30:39.000000000
> +0100
> +++ linux-2.6.20-ed/drivers/net/tg3.c 2007-02-06 22:32:42.000000000 +0100
> @@ -3384,7 +3384,7 @@
> }
> next_pkt_nopost:
> sw_idx++;
> - sw_idx %= TG3_RX_RCB_RING_SIZE(tp);
> + sw_idx &= (TG3_RX_RCB_RING_SIZE(tp) - 1);
>
> /* Refresh hw_idx to see if there is new work */
> if (sw_idx == hw_idx) {
There are other places doing similar divide (e.g. tg3_recycle_rx(),
tg3_alloc_rx_skb()). I think we should change them all.
-
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