netpoll: Use correct primitives for RCU dereferencing

Now that RCU debugging checks for matching rcu_dereference calls
and rcu_read_lock, we need to use the correct primitives or face
nasty warnings.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>

include/linux/netpoll.h

@@ -64,7 +64,7 @@ static inline bool netpoll_rx(struct sk_buff *skb)
 	bool ret = false;
 
 	rcu_read_lock_bh();
-	npinfo = rcu_dereference(skb->dev->npinfo);
+	npinfo = rcu_dereference_bh(skb->dev->npinfo);
 
 	if (!npinfo || (list_empty(&npinfo->rx_np) && !npinfo->rx_flags))
 		goto out;
@@ -82,7 +82,7 @@ static inline bool netpoll_rx(struct sk_buff *skb)
 
 static inline int netpoll_rx_on(struct sk_buff *skb)
 {
-	struct netpoll_info *npinfo = rcu_dereference(skb->dev->npinfo);
+	struct netpoll_info *npinfo = rcu_dereference_bh(skb->dev->npinfo);
 
 	return npinfo && (!list_empty(&npinfo->rx_np) || npinfo->rx_flags);
 }