net: Kill dst->_neighbour, accessors, and final uses.

No longer used.

Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/net/dst.h b/include/net/dst.h
index 295a705..b2634e4 100644
--- a/include/net/dst.h
+++ b/include/net/dst.h
@@ -42,7 +42,7 @@
 		struct dst_entry        *from;
 	};
 	struct dst_entry	*path;
-	struct neighbour __rcu	*_neighbour;
+	void			*__pad0;
 #ifdef CONFIG_XFRM
 	struct xfrm_state	*xfrm;
 #else
@@ -96,21 +96,6 @@
 	};
 };
 
-static inline struct neighbour *dst_get_neighbour_noref(struct dst_entry *dst)
-{
-	return rcu_dereference(dst->_neighbour);
-}
-
-static inline struct neighbour *dst_get_neighbour_noref_raw(struct dst_entry *dst)
-{
-	return rcu_dereference_raw(dst->_neighbour);
-}
-
-static inline void dst_set_neighbour(struct dst_entry *dst, struct neighbour *neigh)
-{
-	rcu_assign_pointer(dst->_neighbour, neigh);
-}
-
 extern u32 *dst_cow_metrics_generic(struct dst_entry *dst, unsigned long old);
 extern const u32 dst_default_metrics[RTAX_MAX];