2 files changed, 104 insertions, 50 deletions

diff --git a/include/linux/netpoll.h b/include/linux/netpoll.h
index ab9aaaff8d04..a0632af88d8b 100644
--- a/include/linux/netpoll.h
+++ b/include/linux/netpoll.h
@@ -24,32 +24,38 @@ struct netpoll {
         struct net_device *dev;
         char dev_name[IFNAMSIZ];
         const char *name;
-        void (*rx_skb_hook)(struct netpoll *np, int source, struct sk_buff *skb,
-                            int offset, int len);
 
         union inet_addr local_ip, remote_ip;
         bool ipv6;
         u16 local_port, remote_port;
         u8 remote_mac[ETH_ALEN];
 
-        struct list_head rx; /* rx_np list element */
         struct work_struct cleanup_work;
+
+#ifdef CONFIG_NETPOLL_TRAP
+        void (*rx_skb_hook)(struct netpoll *np, int source, struct sk_buff *skb,
+                            int offset, int len);
+        struct list_head rx; /* rx_np list element */
+#endif
 };
 
 struct netpoll_info {
         atomic_t refcnt;
 
-        spinlock_t rx_lock;
         struct semaphore dev_lock;
-        struct list_head rx_np; /* netpolls that registered an rx_skb_hook */
 
-        struct sk_buff_head neigh_tx; /* list of neigh requests to reply to */
         struct sk_buff_head txq;
 
         struct delayed_work tx_work;
 
         struct netpoll *netpoll;
         struct rcu_head rcu;
+
+#ifdef CONFIG_NETPOLL_TRAP
+        spinlock_t rx_lock;
+        struct list_head rx_np; /* netpolls that registered an rx_skb_hook */
+        struct sk_buff_head neigh_tx; /* list of neigh requests to reply to */
+#endif
 };
 
 #ifdef CONFIG_NETPOLL
@@ -68,7 +74,6 @@ int netpoll_setup(struct netpoll *np);
 void __netpoll_cleanup(struct netpoll *np);
 void __netpoll_free_async(struct netpoll *np);
 void netpoll_cleanup(struct netpoll *np);
-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)
@@ -82,25 +87,12 @@ static inline void netpoll_send_skb(struct netpoll *np, struct sk_buff *skb)
 #ifdef CONFIG_NETPOLL_TRAP
 int netpoll_trap(void);
 void netpoll_set_trap(int trap);
+int __netpoll_rx(struct sk_buff *skb, struct netpoll_info *npinfo);
 static inline bool netpoll_rx_processing(struct netpoll_info *npinfo)
 {
         return !list_empty(&npinfo->rx_np);
 }
-#else
-static inline int netpoll_trap(void)
-{
-        return 0;
-}
-static inline void netpoll_set_trap(int trap)
-{
-}
-static inline bool netpoll_rx_processing(struct netpoll_info *npinfo)
-{
-        return false;
-}
-#endif
 
-#ifdef CONFIG_NETPOLL
 static inline bool netpoll_rx_on(struct sk_buff *skb)
 {
         struct netpoll_info *npinfo = rcu_dereference_bh(skb->dev->npinfo);
@@ -138,6 +130,33 @@ static inline int netpoll_receive_skb(struct sk_buff *skb)
         return 0;
 }
 
+#else
+static inline int netpoll_trap(void)
+{
+        return 0;
+}
+static inline void netpoll_set_trap(int trap)
+{
+}
+static inline bool netpoll_rx_processing(struct netpoll_info *npinfo)
+{
+        return false;
+}
+static inline bool netpoll_rx(struct sk_buff *skb)
+{
+        return false;
+}
+static inline bool netpoll_rx_on(struct sk_buff *skb)
+{
+        return false;
+}
+static inline int netpoll_receive_skb(struct sk_buff *skb)
+{
+        return 0;
+}
+#endif
+
+#ifdef CONFIG_NETPOLL
 static inline void *netpoll_poll_lock(struct napi_struct *napi)
 {
         struct net_device *dev = napi->dev;
@@ -166,18 +185,6 @@ static inline bool netpoll_tx_running(struct net_device *dev)
 }
 
 #else
-static inline bool netpoll_rx(struct sk_buff *skb)
-{
-        return false;
-}
-static inline bool netpoll_rx_on(struct sk_buff *skb)
-{
-        return false;
-}
-static inline int netpoll_receive_skb(struct sk_buff *skb)
-{
-        return 0;
-}
 static inline void *netpoll_poll_lock(struct napi_struct *napi)
 {
         return NULL;
diff --git a/net/core/netpoll.c b/net/core/netpoll.c
index b69bb3f1ba3f..eed8b1d2d302 100644
--- a/net/core/netpoll.c
+++ b/net/core/netpoll.c
@@ -48,6 +48,7 @@ static struct sk_buff_head skb_pool;
 
 #ifdef CONFIG_NETPOLL_TRAP
 static atomic_t trapped;
+static void netpoll_neigh_reply(struct sk_buff *skb, struct netpoll_info *npinfo);
 #endif
 
 DEFINE_STATIC_SRCU(netpoll_srcu);
@@ -61,7 +62,6 @@ DEFINE_STATIC_SRCU(netpoll_srcu);
          MAX_UDP_CHUNK)
 
 static void zap_completion_queue(void);
-static void netpoll_neigh_reply(struct sk_buff *skb, struct netpoll_info *npinfo);
 static void netpoll_async_cleanup(struct work_struct *work);
 
 static unsigned int carrier_timeout = 4;
@@ -109,6 +109,7 @@ static void queue_process(struct work_struct *work)
         }
 }
 
+#ifdef CONFIG_NETPOLL_TRAP
 static __sum16 checksum_udp(struct sk_buff *skb, struct udphdr *uh,
                             unsigned short ulen, __be32 saddr, __be32 daddr)
 {
@@ -127,6 +128,7 @@ static __sum16 checksum_udp(struct sk_buff *skb, struct udphdr *uh,
 
         return __skb_checksum_complete(skb);
 }
+#endif /* CONFIG_NETPOLL_TRAP */
 
 /*
  * Check whether delayed processing was scheduled for our NIC. If so,
@@ -179,6 +181,7 @@ static void poll_napi(struct net_device *dev, int budget)
         }
 }
 
+#ifdef CONFIG_NETPOLL_TRAP