bonding: remove no longer needed lock for bond_xxx_info_query()

The bond_xxx_info_query() was already in RTNL, so no need to use
bond lock to protect the bond slave list, so remove it.

Cc: Jay Vosburgh <fubar@us.ibm.com>
Cc: Veaceslav Falico <vfalico@redhat.com>
Cc: Andy Gospodarek <andy@greyhouse.net>
Signed-off-by: NDing Tianhong <dingtianhong@huawei.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/bonding/bond_main.c

@@ -1816,9 +1816,7 @@ static int bond_info_query(struct net_device *bond_dev, struct ifbond *info)
 	info->bond_mode = bond->params.mode;
 	info->miimon = bond->params.miimon;
 
-	read_lock(&bond->lock);
 	info->num_slaves = bond->slave_cnt;
-	read_unlock(&bond->lock);
 
 	return 0;
 }
@@ -1830,7 +1828,6 @@ static int bond_slave_info_query(struct net_device *bond_dev, struct ifslave *in
 	int i = 0, res = -ENODEV;
 	struct slave *slave;
 
-	read_lock(&bond->lock);
 	bond_for_each_slave(bond, slave, iter) {
 		if (i++ == (int)info->slave_id) {
 			res = 0;
@@ -1841,7 +1838,6 @@ static int bond_slave_info_query(struct net_device *bond_dev, struct ifslave *in
 			break;
 		}
 	}
-	read_unlock(&bond->lock);
 
 	return res;
 }