snd_usb_feature_unit_ctl 1507 sound/usb/mixer.c struct snd_kcontrol_new *snd_usb_feature_unit_ctl = &usb_feature_unit_ctl;
snd_usb_feature_unit_ctl  129 sound/usb/mixer.h extern struct snd_kcontrol_new *snd_usb_feature_unit_ctl;
snd_usb_feature_unit_ctl   85 sound/usb/mixer_quirks.c 	kctl = snd_ctl_new1(snd_usb_feature_unit_ctl, cval);