From 535114539bb2c081b6680cb5a34be17e7b45df37 Mon Sep 17 00:00:00 2001 From: Eric Dumazet Date: Wed, 8 Oct 2014 08:19:27 -0700 Subject: net: add netdev_txq_bql_{enqueue, complete}_prefetchw() helpers Add two helpers so that drivers do not have to care of BQL being available or not. Signed-off-by: Eric Dumazet Reported-by: Jim Davis Fixes: 29d40c903247 ("net/mlx4_en: Use prefetch in tx path") Signed-off-by: David S. Miller --- drivers/net/ethernet/mellanox/mlx4/en_tx.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) (limited to 'drivers') diff --git a/drivers/net/ethernet/mellanox/mlx4/en_tx.c b/drivers/net/ethernet/mellanox/mlx4/en_tx.c index 8726a4aee5a7..34c137878545 100644 --- a/drivers/net/ethernet/mellanox/mlx4/en_tx.c +++ b/drivers/net/ethernet/mellanox/mlx4/en_tx.c @@ -392,7 +392,8 @@ static bool mlx4_en_process_tx_cq(struct net_device *dev, if (!priv->port_up) return true; - prefetchw(&ring->tx_queue->dql.limit); + netdev_txq_bql_complete_prefetchw(ring->tx_queue); + index = cons_index & size_mask; cqe = mlx4_en_get_cqe(buf, index, priv->cqe_size) + factor; last_nr_txbb = ACCESS_ONCE(ring->last_nr_txbb); @@ -737,7 +738,7 @@ netdev_tx_t mlx4_en_xmit(struct sk_buff *skb, struct net_device *dev) vlan_tag = vlan_tx_tag_get(skb); - prefetchw(&ring->tx_queue->dql); + netdev_txq_bql_enqueue_prefetchw(ring->tx_queue); /* Track current inflight packets for performance analysis */ AVG_PERF_COUNTER(priv->pstats.inflight_avg, -- cgit v1.2.3-55-g7522