net: bridge: convert group_addr_set option to a bit

Convert group_addr_set internal bridge opt to a bit.
Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Reviewed-by: Stephen Hemminger <stephen@networkplumber.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/bridge/br_netlink.c

@@ -1139,7 +1139,7 @@ static int br_changelink(struct net_device *brdev, struct nlattr *tb[],
 		spin_lock_bh(&br->lock);
 		memcpy(br->group_addr, new_addr, sizeof(br->group_addr));
 		spin_unlock_bh(&br->lock);
-		br->group_addr_set = true;
+		br_opt_toggle(br, BROPT_GROUP_ADDR_SET, true);
 		br_recalculate_fwd_mask(br);
 	}
 

net/bridge/br_private.h

@@ -312,6 +312,7 @@ enum net_bridge_opts {
 	BROPT_NF_CALL_IPTABLES,
 	BROPT_NF_CALL_IP6TABLES,
 	BROPT_NF_CALL_ARPTABLES,
+	BROPT_GROUP_ADDR_SET,
 };
 
 struct net_bridge {
@@ -355,7 +356,6 @@ struct net_bridge {
 	unsigned long			bridge_ageing_time;
 
 	u8				group_addr[ETH_ALEN];
-	bool				group_addr_set;
 
 	enum {
 		BR_NO_STP, 		/* no spanning tree */

net/bridge/br_sysfs_br.c

@@ -303,7 +303,7 @@ static ssize_t group_addr_store(struct device *d,
 	ether_addr_copy(br->group_addr, new_addr);
 	spin_unlock_bh(&br->lock);
 
-	br->group_addr_set = true;
+	br_opt_toggle(br, BROPT_GROUP_ADDR_SET, true);
 	br_recalculate_fwd_mask(br);
 	netdev_state_change(br->dev);
 

net/bridge/br_vlan.c

@@ -695,7 +695,7 @@ struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, u16 vid)
 /* Must be protected by RTNL. */
 static void recalculate_group_addr(struct net_bridge *br)
 {
-	if (br->group_addr_set)
+	if (br_opt_get(br, BROPT_GROUP_ADDR_SET))
 		return;
 
 	spin_lock_bh(&br->lock);