snd_ctl_unregister_ioctl  123 include/sound/control.h int snd_ctl_unregister_ioctl(snd_kctl_ioctl_func_t fcn);
snd_ctl_unregister_ioctl  520 sound/core/hwdep.c 	snd_ctl_unregister_ioctl(snd_hwdep_control_ioctl);
snd_ctl_unregister_ioctl 1136 sound/core/pcm.c 	snd_ctl_unregister_ioctl(snd_pcm_control_ioctl);
snd_ctl_unregister_ioctl 1661 sound/core/rawmidi.c 	snd_ctl_unregister_ioctl(snd_rawmidi_control_ioctl);