ddlist_t
static ddlist_t dev_data_list; /* all dev_datas */
static ddlist_t dev_data_list_hpib; /* hpib controller dev_datas */
static ddlist_t dev_data_list_scsi; /* scsi controller dev_datas */
static void findbootdev_slave(ddlist_t *, int, int, int);
static void dev_data_insert(struct dev_data *, ddlist_t *);
findbootdev_slave(ddlist_t *ddlist, int ctlr, int slave, int punit)
dev_data_insert(struct dev_data *dd, ddlist_t *ddlist)