register_sound_special   12 include/linux/sound.h extern int register_sound_special(const struct file_operations *fops, int unit);
register_sound_special 1384 sound/oss/dmasound/dmasound_core.c 	state_unit = register_sound_special(&state_fops, SND_DEV_STATUS);
register_sound_special  422 sound/sound_core.c EXPORT_SYMBOL(register_sound_special);