sky2: optimize transmit completion

Don't reference the list element in hardware transmit ring on transmit
completion. The list element is updated by hardware, therefore
it causes a cache miss. Do book keeping in software structure.

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 3 insertions, 0 deletions

diff --git a/drivers/net/sky2.h b/drivers/net/sky2.h
index 2c262f763f93..9d07a466aec1 100644
--- a/drivers/net/sky2.h
+++ b/drivers/net/sky2.h
@@ -1984,6 +1984,9 @@ struct sky2_status_le {
 
 struct tx_ring_info {
         struct sk_buff  *skb;
+        unsigned long flags;
+#define TX_MAP_SINGLE   0x0001
+#define TX_MAP_PAGE     000002
         DECLARE_PCI_UNMAP_ADDR(mapaddr);
         DECLARE_PCI_UNMAP_LEN(maplen);
 };