Add a couple more prefetches to where we walk the rings.
Signed-off-by: Stephen Hemminger <[EMAIL PROTECTED]>
--- sky2-netdev.orig/drivers/net/sky2.c
+++ sky2-netdev/drivers/net/sky2.c
@@ -45,6 +45,7 @@
#include <linux/delay.h>
#include <linux/workqueue.h>
#include <linux/if_vlan.h>
+#include <linux/prefetch.h>
#include <linux/mii.h>
#include <asm/irq.h>
@@ -1248,6 +1249,7 @@ static void sky2_tx_complete(struct sky2
nxt = re->idx;
BUG_ON(nxt >= TX_RING_SIZE);
+ prefetch(sky2->tx_ring + nxt);
/* Check for partial status */
if (tx_dist(put, done) < tx_dist(put, nxt))
@@ -1659,6 +1661,7 @@ static struct sk_buff *sky2_receive(stru
sky2->netdev->name, sky2->rx_next, status, length);
sky2->rx_next = (sky2->rx_next + 1) % sky2->rx_pending;
+ prefetch(sky2->rx_ring + sky2->rx_next);
if (status & GMR_FS_ANY_ERR)
goto error;
--
Stephen Hemminger <[EMAIL PROTECTED]>
OSDL http://developer.osdl.org/~shemminger
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