blkdev_dio
struct blkdev_dio *dio = bio->bi_private;
struct blkdev_dio *dio;
dio = container_of(bio, struct blkdev_dio, bio);
struct blkdev_dio *dio = container_of(bio, struct blkdev_dio, bio);
struct blkdev_dio *dio;
dio = container_of(bio, struct blkdev_dio, bio);
offsetof(struct blkdev_dio, bio),