net: Annotates neigh_invalidate()

Annotates neigh_invalidate() with __releases() and __acquires() for
sparse sake.

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/core/neighbour.c

@@ -771,6 +771,8 @@ static __inline__ int neigh_max_probes(struct neighbour *n)
 }
 
 static void neigh_invalidate(struct neighbour *neigh)
+	__releases(neigh->lock)
+	__acquires(neigh->lock)
 {
 	struct sk_buff *skb;