register_sound_special_device 13 include/linux/sound.h extern int register_sound_special_device(const struct file_operations *fops, int unit, struct device *dev); register_sound_special_device 123 sound/core/sound_oss.c register1 = register_sound_special_device(f_ops, minor, carddev); register_sound_special_device 127 sound/core/sound_oss.c register2 = register_sound_special_device(f_ops, track2, register_sound_special_device 415 sound/sound_core.c EXPORT_SYMBOL(register_sound_special_device); register_sound_special_device 419 sound/sound_core.c return register_sound_special_device(fops, unit, NULL);