bond_first_slave_rcu
first_slave = bond_first_slave_rcu(bond);
slave = bond_first_slave_rcu(bond);
first_slave = bond_first_slave_rcu(bond);
curr_arp_slave = bond_first_slave_rcu(bond);
slave = bond_first_slave_rcu(bond);
return bond_first_slave_rcu(bond);