disk_to_cdi
if (cdrom || disk_to_cdi(file_bdev(vbd->bdev_file)->bd_disk))
struct cdrom_device_info *cdi = disk_to_cdi(sb->s_bdev->bd_disk);
struct cdrom_device_info *cdi = disk_to_cdi(sb->s_bdev->bd_disk);
struct cdrom_device_info *cdi = disk_to_cdi(sb->s_bdev->bd_disk);
struct cdrom_device_info *cdi = disk_to_cdi(sb->s_bdev->bd_disk);
struct cdrom_device_info *cdi = disk_to_cdi(sb->s_bdev->bd_disk);