Merge tag 'pinctrl-for-3.7-late' of git://git.kernel.org/pub/scm/linux/kernel/git...

[karo-tx-linux.git] / include / linux / netpoll.h

diff --git a/include/linux/netpoll.h b/include/linux/netpoll.h
index 28f5389c924b51b76cf88dc5da1af7f3a0853138..66d5379c305e60d17dcde8b60d286f0b57b23a16 100644 (file)
--- a/include/linux/netpoll.h
+++ b/include/linux/netpoll.h
@@ -23,6 +23,7 @@ struct netpoll {
        u8 remote_mac[ETH_ALEN];
 
        struct list_head rx; /* rx_np list element */
+       struct rcu_head rcu;
 };
 
 struct netpoll_info {
@@ -38,28 +39,40 @@ struct netpoll_info {
        struct delayed_work tx_work;
 
        struct netpoll *netpoll;
+       struct rcu_head rcu;
 };
 
 void netpoll_send_udp(struct netpoll *np, const char *msg, int len);
 void netpoll_print_options(struct netpoll *np);
 int netpoll_parse_options(struct netpoll *np, char *opt);
-int __netpoll_setup(struct netpoll *np, struct net_device *ndev);
+int __netpoll_setup(struct netpoll *np, struct net_device *ndev, gfp_t gfp);
 int netpoll_setup(struct netpoll *np);
 int netpoll_trap(void);
 void netpoll_set_trap(int trap);
 void __netpoll_cleanup(struct netpoll *np);
+void __netpoll_free_rcu(struct netpoll *np);
 void netpoll_cleanup(struct netpoll *np);
-int __netpoll_rx(struct sk_buff *skb);
+int __netpoll_rx(struct sk_buff *skb, struct netpoll_info *npinfo);
 void netpoll_send_skb_on_dev(struct netpoll *np, struct sk_buff *skb,
                             struct net_device *dev);
 static inline void netpoll_send_skb(struct netpoll *np, struct sk_buff *skb)
 {
+       unsigned long flags;
+       local_irq_save(flags);
        netpoll_send_skb_on_dev(np, skb, np->dev);
+       local_irq_restore(flags);
 }
 
 
 
 #ifdef CONFIG_NETPOLL
+static inline bool netpoll_rx_on(struct sk_buff *skb)
+{
+       struct netpoll_info *npinfo = rcu_dereference_bh(skb->dev->npinfo);
+
+       return npinfo && (!list_empty(&npinfo->rx_np) || npinfo->rx_flags);
+}
+
 static inline bool netpoll_rx(struct sk_buff *skb)
 {
        struct netpoll_info *npinfo;
@@ -67,14 +80,14 @@ static inline bool netpoll_rx(struct sk_buff *skb)
        bool ret = false;
 
        local_irq_save(flags);
-       npinfo = rcu_dereference_bh(skb->dev->npinfo);
 
-       if (!npinfo || (list_empty(&npinfo->rx_np) && !npinfo->rx_flags))
+       if (!netpoll_rx_on(skb))
                goto out;
 
+       npinfo = rcu_dereference_bh(skb->dev->npinfo);
        spin_lock(&npinfo->rx_lock);
        /* check rx_flags again with the lock held */
-       if (npinfo->rx_flags && __netpoll_rx(skb))
+       if (npinfo->rx_flags && __netpoll_rx(skb, npinfo))
                ret = true;
        spin_unlock(&npinfo->rx_lock);
 
@@ -83,13 +96,6 @@ out:
        return ret;
 }
 
-static inline int netpoll_rx_on(struct sk_buff *skb)
-{
-       struct netpoll_info *npinfo = rcu_dereference_bh(skb->dev->npinfo);
-
-       return npinfo && (!list_empty(&npinfo->rx_np) || npinfo->rx_flags);
-}
-
 static inline int netpoll_receive_skb(struct sk_buff *skb)
 {
        if (!list_empty(&skb->dev->napi_list))
@@ -119,7 +125,7 @@ static inline void netpoll_poll_unlock(void *have)
        }
 }
 
-static inline int netpoll_tx_running(struct net_device *dev)
+static inline bool netpoll_tx_running(struct net_device *dev)
 {
        return irqs_disabled();
 }
@@ -127,11 +133,11 @@ static inline int netpoll_tx_running(struct net_device *dev)
 #else
 static inline bool netpoll_rx(struct sk_buff *skb)
 {
-       return 0;
+       return false;
 }
-static inline int netpoll_rx_on(struct sk_buff *skb)
+static inline bool netpoll_rx_on(struct sk_buff *skb)
 {
-       return 0;
+       return false;
 }
 static inline int netpoll_receive_skb(struct sk_buff *skb)
 {
@@ -147,9 +153,9 @@ static inline void netpoll_poll_unlock(void *have)
 static inline void netpoll_netdev_init(struct net_device *dev)
 {
 }
-static inline int netpoll_tx_running(struct net_device *dev)
+static inline bool netpoll_tx_running(struct net_device *dev)
 {
-       return 0;
+       return false;
 }
 #endif