snd_firewire_motu_register_dsp_meter
#define SNDRV_FIREWIRE_IOCTL_MOTU_REGISTER_DSP_METER _IOR('H', 0xfc, struct snd_firewire_motu_register_dsp_meter)
struct snd_firewire_motu_register_dsp_meter *meter;
struct snd_firewire_motu_register_dsp_meter *meter)
struct snd_firewire_motu_register_dsp_meter meter;
struct snd_firewire_motu_register_dsp_meter *meter);