decnet: Move dn_next into decnet route structure.

Signed-off-by: David S. Miller <[e-mail]>
Reviewed-by: Eric Dumazet <[e-mail]>

include/net/dn_route.h

···
  */
 struct dn_route {
 	struct dst_entry dst;
+	struct dn_route __rcu *dn_next;
 
 	struct neighbour *n;
 

include/net/dst.h

···
 	union {
 		struct dst_entry	*next;
 		struct rt6_info __rcu	*rt6_next;
-		struct dn_route __rcu	*dn_next;
 	};
 };
 

net/decnet/dn_route.c

···
 						lockdep_is_held(&dn_rt_hash_table[i].lock))) != NULL) {
 			if (atomic_read(&rt->dst.__refcnt) > 1 ||
 			    (now - rt->dst.lastuse) < expire) {
-				rtp = &rt->dst.dn_next;
+				rtp = &rt->dn_next;
 				continue;
 			}
-			*rtp = rt->dst.dn_next;
-			rt->dst.dn_next = NULL;
+			*rtp = rt->dn_next;
+			rt->dn_next = NULL;
 			dst_dev_put(&rt->dst);
 			dst_release(&rt->dst);
 		}
···
 						lockdep_is_held(&dn_rt_hash_table[i].lock))) != NULL) {
 			if (atomic_read(&rt->dst.__refcnt) > 1 ||
 			    (now - rt->dst.lastuse) < expire) {
-				rtp = &rt->dst.dn_next;
+				rtp = &rt->dn_next;
 				continue;
 			}
-			*rtp = rt->dst.dn_next;
-			rt->dst.dn_next = NULL;
+			*rtp = rt->dn_next;
+			rt->dn_next = NULL;
 			dst_dev_put(&rt->dst);
 			dst_release(&rt->dst);
 			break;
···
 						lockdep_is_held(&dn_rt_hash_table[hash].lock))) != NULL) {
 		if (compare_keys(&rth->fld, &rt->fld)) {
 			/* Put it first */
-			*rthp = rth->dst.dn_next;
-			rcu_assign_pointer(rth->dst.dn_next,
+			*rthp = rth->dn_next;
+			rcu_assign_pointer(rth->dn_next,
 					   dn_rt_hash_table[hash].chain);
 			rcu_assign_pointer(dn_rt_hash_table[hash].chain, rth);
 
···
 			*rp = rth;
 			return 0;
 		}
-		rthp = &rth->dst.dn_next;
+		rthp = &rth->dn_next;
 	}
 
-	rcu_assign_pointer(rt->dst.dn_next, dn_rt_hash_table[hash].chain);
+	rcu_assign_pointer(rt->dn_next, dn_rt_hash_table[hash].chain);
 	rcu_assign_pointer(dn_rt_hash_table[hash].chain, rt);
 
 	dst_hold_and_use(&rt->dst, now);
···
 			goto nothing_to_declare;
 
 		for(; rt; rt = next) {
-			next = rcu_dereference_raw(rt->dst.dn_next);
-			RCU_INIT_POINTER(rt->dst.dn_next, NULL);
+			next = rcu_dereference_raw(rt->dn_next);
+			RCU_INIT_POINTER(rt->dn_next, NULL);
 			dst_dev_put(&rt->dst);
 			dst_release(&rt->dst);
 		}
···
 	if (rt == NULL)
 		goto e_nobufs;
 
+	rt->dn_next = NULL;
 	memset(&rt->fld, 0, sizeof(rt->fld));
 	rt->fld.saddr        = oldflp->saddr;
 	rt->fld.daddr        = oldflp->daddr;
···
 	if (!(flags & MSG_TRYHARD)) {
 		rcu_read_lock_bh();
 		for (rt = rcu_dereference_bh(dn_rt_hash_table[hash].chain); rt;
-			rt = rcu_dereference_bh(rt->dst.dn_next)) {
+			rt = rcu_dereference_bh(rt->dn_next)) {
 			if ((flp->daddr == rt->fld.daddr) &&
 			    (flp->saddr == rt->fld.saddr) &&
 			    (flp->flowidn_mark == rt->fld.flowidn_mark) &&
···
 	if (rt == NULL)
 		goto e_nobufs;
 
+	rt->dn_next = NULL;
 	memset(&rt->fld, 0, sizeof(rt->fld));
 	rt->rt_saddr      = fld.saddr;
 	rt->rt_daddr      = fld.daddr;
···
 
 	rcu_read_lock();
 	for(rt = rcu_dereference(dn_rt_hash_table[hash].chain); rt != NULL;
-	    rt = rcu_dereference(rt->dst.dn_next)) {
+	    rt = rcu_dereference(rt->dn_next)) {
 		if ((rt->fld.saddr == cb->src) &&
 		    (rt->fld.daddr == cb->dst) &&
 		    (rt->fld.flowidn_oif == 0) &&
···
 		rcu_read_lock_bh();
 		for(rt = rcu_dereference_bh(dn_rt_hash_table[h].chain), idx = 0;
 			rt;
-			rt = rcu_dereference_bh(rt->dst.dn_next), idx++) {
+			rt = rcu_dereference_bh(rt->dn_next), idx++) {
 			if (idx < s_idx)
 				continue;
 			skb_dst_set(skb, dst_clone(&rt->dst));
···
 {
 	struct dn_rt_cache_iter_state *s = seq->private;
 
-	rt = rcu_dereference_bh(rt->dst.dn_next);
+	rt = rcu_dereference_bh(rt->dn_next);
 	while (!rt) {
 		rcu_read_unlock_bh();
 		if (--s->bucket < 0)