TAGID_UNALLOC_SPACE
case TAGID_UNALLOC_SPACE : /* unallocated space */
udf_inittag(&usd->tag, TAGID_UNALLOC_SPACE, /* loc */ 0);
case TAGID_UNALLOC_SPACE :
case TAGID_UNALLOC_SPACE : /* unallocated space */
case TAGID_UNALLOC_SPACE :