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Commit ac0b715e authored by Zhu Yanjun's avatar Zhu Yanjun Committed by David S. Miller
Browse files

forcedeth: optimize the rx with likely 



In the rx fastpath, the function netdev_alloc_skb rarely fails.
Therefore, a likely() optimization is added to this error check
conditional.

CC: Srinivas Eeda <srinivas.eeda@oracle.com>
CC: Joe Jin <joe.jin@oracle.com>
CC: Junxiao Bi <junxiao.bi@oracle.com>
Signed-off-by: default avatarZhu Yanjun <yanjun.zhu@oracle.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent d36f45e5

drivers/net/ethernet/nvidia/forcedeth.c

+2 −2
Original line number Diff line number Diff line
@@ -1817,7 +1817,7 @@ static int nv_alloc_rx(struct net_device *dev) 


	while (np->put_rx.orig != less_rx) {

		struct sk_buff *skb = netdev_alloc_skb(dev, np->rx_buf_sz + NV_RX_ALLOC_PAD);

		if (skb) {

		if (likely(skb)) {

			np->put_rx_ctx->skb = skb;

			np->put_rx_ctx->dma = dma_map_single(&np->pci_dev->dev,

							     skb->data,
@@ -1858,7 +1858,7 @@ static int nv_alloc_rx_optimized(struct net_device *dev) 


	while (np->put_rx.ex != less_rx) {

		struct sk_buff *skb = netdev_alloc_skb(dev, np->rx_buf_sz + NV_RX_ALLOC_PAD);

		if (skb) {

		if (likely(skb)) {

			np->put_rx_ctx->skb = skb;

			np->put_rx_ctx->dma = dma_map_single(&np->pci_dev->dev,

							     skb->data,