audio_ioctl 979 include/linux/cdrom.h int (*audio_ioctl) (struct cdrom_device_info *,unsigned int, void *); audio_ioctl 36 sound/oss/sound_calls.h int audio_ioctl (int dev, struct file *file, audio_ioctl 385 sound/oss/soundcard.c return audio_ioctl(dev, file, cmd, p);