net,rcu: convert call_rcu(ha_rcu_free) to kfree_rcu()

The rcu callback ha_rcu_free() just calls a kfree(),
so we use kfree_rcu() instead of the call_rcu(ha_rcu_free).
Signed-off-by: NLai Jiangshan <laijs@cn.fujitsu.com>
Acked-by: NDavid S. Miller <davem@davemloft.net>
Signed-off-by: NPaul E. McKenney <paulmck@linux.vnet.ibm.com>
Reviewed-by: NJosh Triplett <josh@joshtriplett.org>

net/core/dev_addr_lists.c

@@ -68,14 +68,6 @@ static int __hw_addr_add(struct netdev_hw_addr_list *list, unsigned char *addr,
 	return __hw_addr_add_ex(list, addr, addr_len, addr_type, false);
 }
 
-static void ha_rcu_free(struct rcu_head *head)
-{
-	struct netdev_hw_addr *ha;
-
-	ha = container_of(head, struct netdev_hw_addr, rcu_head);
-	kfree(ha);
-}
-
 static int __hw_addr_del_ex(struct netdev_hw_addr_list *list,
 			    unsigned char *addr, int addr_len,
 			    unsigned char addr_type, bool global)
@@ -94,7 +86,7 @@ static int __hw_addr_del_ex(struct netdev_hw_addr_list *list,
 			if (--ha->refcount)
 				return 0;
 			list_del_rcu(&ha->list);
-			call_rcu(&ha->rcu_head, ha_rcu_free);
+			kfree_rcu(ha, rcu_head);
 			list->count--;
 			return 0;
 		}
@@ -197,7 +189,7 @@ void __hw_addr_flush(struct netdev_hw_addr_list *list)
 
 	list_for_each_entry_safe(ha, tmp, &list->list, list) {
 		list_del_rcu(&ha->list);
-		call_rcu(&ha->rcu_head, ha_rcu_free);
+		kfree_rcu(ha, rcu_head);
 	}
 	list->count = 0;
 }