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Commit 054bb880 authored by dingtianhong's avatar dingtianhong Committed by David S. Miller
Browse files

bonding: slight optimization for bond xmit path 



Add unlikely() micro to the unlikely conditions in the bond
xmit path for slight optimization.

Signed-off-by: default avatarDing Tianhong <dingtianhong@huawei.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 7aceb47a

drivers/net/bonding/bond_main.c

+3 −3
Original line number Diff line number Diff line
@@ -2957,7 +2957,7 @@ static bool bond_flow_dissect(struct bonding *bond, struct sk_buff *skb, 
	fk->ports = 0;

	noff = skb_network_offset(skb);

	if (skb->protocol == htons(ETH_P_IP)) {

		if (!pskb_may_pull(skb, noff + sizeof(*iph)))

		if (unlikely(!pskb_may_pull(skb, noff + sizeof(*iph))))

			return false;

		iph = ip_hdr(skb);

		fk->src = iph->saddr;
@@ -2966,7 +2966,7 @@ static bool bond_flow_dissect(struct bonding *bond, struct sk_buff *skb, 
		if (!ip_is_fragment(iph))

			proto = iph->protocol;

	} else if (skb->protocol == htons(ETH_P_IPV6)) {

		if (!pskb_may_pull(skb, noff + sizeof(*iph6)))

		if (unlikely(!pskb_may_pull(skb, noff + sizeof(*iph6))))

			return false;

		iph6 = ipv6_hdr(skb);

		fk->src = (__force __be32)ipv6_addr_hash(&iph6->saddr);
@@ -3768,7 +3768,7 @@ static netdev_tx_t bond_start_xmit(struct sk_buff *skb, struct net_device *dev) 
	 * If we risk deadlock from transmitting this in the

	 * netpoll path, tell netpoll to queue the frame for later tx

	 */

	if (is_netpoll_tx_blocked(dev))

	if (unlikely(is_netpoll_tx_blocked(dev)))

		return NETDEV_TX_BUSY;



	rcu_read_lock();