hpfs_add_de
copy_de(de=hpfs_add_de(i->i_sb, d, name, namelen, down_ptr), new_de);
copy_de(de = hpfs_add_de(i->i_sb, nd, name, namelen, down_ptr), new_de);
copy_de(hpfs_add_de(i->i_sb, ad, de->name, de->namelen, de->down ? de_down_pointer(de) : 0), de);
struct hpfs_dirent *hpfs_add_de(struct super_block *, struct dnode *,
de = hpfs_add_de(dir->i_sb, dnode, "\001\001", 2, 0);