vfat_get_dotdot_de
err = vfat_get_dotdot_de(old_inode, &old_dotdot_bh,
err = vfat_get_dotdot_de(new_inode, &new_dotdot_bh,
err = vfat_get_dotdot_de(old_inode, &dotdot_bh, &dotdot_de);