VCHIQ_IOC_MAX
static_assert(ARRAY_SIZE(ioctl_names) == (VCHIQ_IOC_MAX + 1));
((_IOC_TYPE(cmd) == VCHIQ_IOC_MAGIC) && (_IOC_NR(cmd) <= VCHIQ_IOC_MAX)) ?
instance, (_IOC_NR(cmd) <= VCHIQ_IOC_MAX) ?
instance, (_IOC_NR(cmd) <= VCHIQ_IOC_MAX) ?