ipv6: additional ref count for hash list unnecessary

Since an address in hash list has to already have a ref count,
no additional ref count is needed.
Signed-off-by: NStephen Hemminger <shemminger@vyatta.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

net/ipv6/addrconf.c

@@ -676,7 +676,6 @@ ipv6_add_addr(struct inet6_dev *idev, const struct in6_addr *addr, int pfxlen,
 	hash = ipv6_addr_hash(addr);
 
 	hlist_add_head_rcu(&ifa->addr_lst, &inet6_addr_lst[hash]);
-	in6_ifa_hold(ifa);
 	spin_unlock(&addrconf_hash_lock);
 
 	write_lock(&idev->lock);
@@ -724,7 +723,6 @@ static void ipv6_del_addr(struct inet6_ifaddr *ifp)
 
 	spin_lock_bh(&addrconf_hash_lock);
 	hlist_del_init_rcu(&ifp->addr_lst);
-	__in6_ifa_put(ifp);
 	spin_unlock_bh(&addrconf_hash_lock);
 
 	write_lock_bh(&idev->lock);
@@ -2713,7 +2711,6 @@ static int addrconf_ifdown(struct net_device *dev, int how)
 			/* clear hash table */
 			spin_lock_bh(&addrconf_hash_lock);
 			hlist_del_init_rcu(&ifa->addr_lst);
-			__in6_ifa_put(ifa);
 			spin_unlock_bh(&addrconf_hash_lock);
 		}