1 (struct seq_oss_devinfo)->synths, <, (struct seq_oss_devinfo)->max_synthdev
2 (struct hid_report)->field, <, (struct hid_report)->maxfield
3 (struct pidff_device)->pid_id, <, (struct ff_device)->max_effects
4 (struct usb_mixer_elem_info)->cache_val, <, (struct snd_ctl_elem_id)->index
