__bond_opt_init
#define bond_opt_initval(optval, value) __bond_opt_init(optval, NULL, value, NULL, 0)
#define bond_opt_initstr(optval, str) __bond_opt_init(optval, str, ULLONG_MAX, NULL, 0)
__bond_opt_init(optval, NULL, ULLONG_MAX, extra, extra_len)
__bond_opt_init(optval, NULL, value, slave_dev, sizeof(struct net_device *))