dio->end_io(dio->inode, offset, bytes, dio->map_bh.b_private);
dio->end_io(dio->iocb, offset, bytes, dio->map_bh.b_private);
static void dio_complete(struct dio *dio, loff_t offset, ssize_t bytes){	if (dio->end_io && dio->result)		dio->end_io(dio->inode, offset, bytes, dio->map_bh.b_private);	if (dio->lock_type == DIO_LOCKING)		up_read(&dio->inode->i_alloc_sem);}