net: remove support for per driver ndo_busy_poll()
We added generic support for busy polling in NAPI layer in linux-4.5 No network driver uses ndo_busy_poll() anymore, we can get rid of the pointer in struct net_device_ops, and its use in sk_busy_loop() Saves NETIF_F_BUSY_POLL features bit. Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -71,7 +71,6 @@ enum {
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NETIF_F_HW_VLAN_STAG_RX_BIT, /* Receive VLAN STAG HW acceleration */
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NETIF_F_HW_VLAN_STAG_FILTER_BIT,/* Receive filtering on VLAN STAGs */
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NETIF_F_HW_L2FW_DOFFLOAD_BIT, /* Allow L2 Forwarding in Hardware */
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NETIF_F_BUSY_POLL_BIT, /* Busy poll */
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NETIF_F_HW_TC_BIT, /* Offload TC infrastructure */
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@ -134,7 +133,6 @@ enum {
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#define NETIF_F_HW_VLAN_STAG_RX __NETIF_F(HW_VLAN_STAG_RX)
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#define NETIF_F_HW_VLAN_STAG_TX __NETIF_F(HW_VLAN_STAG_TX)
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#define NETIF_F_HW_L2FW_DOFFLOAD __NETIF_F(HW_L2FW_DOFFLOAD)
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#define NETIF_F_BUSY_POLL __NETIF_F(BUSY_POLL)
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#define NETIF_F_HW_TC __NETIF_F(HW_TC)
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#define for_each_netdev_feature(mask_addr, bit) \
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@ -1184,9 +1184,6 @@ struct net_device_ops {
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int (*ndo_netpoll_setup)(struct net_device *dev,
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struct netpoll_info *info);
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void (*ndo_netpoll_cleanup)(struct net_device *dev);
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#endif
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#ifdef CONFIG_NET_RX_BUSY_POLL
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int (*ndo_busy_poll)(struct napi_struct *dev);
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#endif
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int (*ndo_set_vf_mac)(struct net_device *dev,
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int queue, u8 *mac);
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@ -4978,7 +4978,6 @@ bool sk_busy_loop(struct sock *sk, int nonblock)
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{
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unsigned long end_time = !nonblock ? sk_busy_loop_end_time(sk) : 0;
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int (*napi_poll)(struct napi_struct *napi, int budget);
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int (*busy_poll)(struct napi_struct *dev);
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void *have_poll_lock = NULL;
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struct napi_struct *napi;
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int rc;
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@ -4993,17 +4992,10 @@ restart:
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if (!napi)
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goto out;
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/* Note: ndo_busy_poll method is optional in linux-4.5 */
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busy_poll = napi->dev->netdev_ops->ndo_busy_poll;
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preempt_disable();
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for (;;) {
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rc = 0;
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local_bh_disable();
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if (busy_poll) {
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rc = busy_poll(napi);
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goto count;
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}
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if (!napi_poll) {
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unsigned long val = READ_ONCE(napi->state);
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@ -6956,13 +6948,6 @@ static netdev_features_t netdev_fix_features(struct net_device *dev,
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features &= ~dev->gso_partial_features;
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}
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#ifdef CONFIG_NET_RX_BUSY_POLL
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if (dev->netdev_ops->ndo_busy_poll)
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features |= NETIF_F_BUSY_POLL;
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else
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#endif
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features &= ~NETIF_F_BUSY_POLL;
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return features;
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}
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@ -102,7 +102,6 @@ static const char netdev_features_strings[NETDEV_FEATURE_COUNT][ETH_GSTRING_LEN]
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[NETIF_F_RXFCS_BIT] = "rx-fcs",
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[NETIF_F_RXALL_BIT] = "rx-all",
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[NETIF_F_HW_L2FW_DOFFLOAD_BIT] = "l2-fwd-offload",
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[NETIF_F_BUSY_POLL_BIT] = "busy-poll",
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[NETIF_F_HW_TC_BIT] = "hw-tc-offload",
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};
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