Avoid divide (modulus) in receive buffer handling path.
Signed-off-by: Stephen Hemminger <[EMAIL PROTECTED]>
--- a/drivers/net/sky2.c 2007-08-29 11:41:23.000000000 -0700
+++ b/drivers/net/sky2.c 2007-08-29 11:45:00.000000000 -0700
@@ -2140,7 +2140,8 @@ static struct sk_buff *sky2_receive(stru
printk(KERN_DEBUG PFX "%s: rx slot %u status 0x%x len %d\n",
dev->name, sky2->rx_next, status, length);
- sky2->rx_next = (sky2->rx_next + 1) % sky2->rx_pending;
+ if (++sky2->rx_next >= sky2->rx_pending)
+ sky2->rx_next = 0;
prefetch(sky2->rx_ring + sky2->rx_next);
if (status & GMR_FS_ANY_ERR)
--
Stephen Hemminger <[EMAIL PROTECTED]>
-
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