net: cleanup some rcu_dereference_raw

RCU api had been completed and rcu_access_pointer() or
rcu_dereference_protected() are better than generic
rcu_dereference_raw()

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv4/route.c b/net/ipv4/route.c
index cb7efe0..d6e3213 100644
--- a/net/ipv4/route.c
+++ b/net/ipv4/route.c
@@ -324,7 +324,7 @@
 	struct rtable *r = NULL;
 
 	for (st->bucket = rt_hash_mask; st->bucket >= 0; --st->bucket) {
-		if (!rcu_dereference_raw(rt_hash_table[st->bucket].chain))
+		if (!rcu_access_pointer(rt_hash_table[st->bucket].chain))
 			continue;
 		rcu_read_lock_bh();
 		r = rcu_dereference_bh(rt_hash_table[st->bucket].chain);
@@ -350,7 +350,7 @@
 		do {
 			if (--st->bucket < 0)
 				return NULL;
-		} while (!rcu_dereference_raw(rt_hash_table[st->bucket].chain));
+		} while (!rcu_access_pointer(rt_hash_table[st->bucket].chain));
 		rcu_read_lock_bh();
 		r = rcu_dereference_bh(rt_hash_table[st->bucket].chain);
 	}
@@ -762,7 +762,7 @@
 
 		if (process_context && need_resched())
 			cond_resched();
-		rth = rcu_dereference_raw(rt_hash_table[i].chain);
+		rth = rcu_access_pointer(rt_hash_table[i].chain);
 		if (!rth)
 			continue;