in bus.c [89:98]
int nubus_device_register(struct nubus_board *board)
{
board->dev.parent = &nubus_parent;
board->dev.release = nubus_device_release;
board->dev.bus = &nubus_bus_type;
dev_set_name(&board->dev, "slot.%X", board->slot);
board->dev.dma_mask = &board->dev.coherent_dma_mask;
dma_set_mask(&board->dev, DMA_BIT_MASK(32));
return device_register(&board->dev);
}