TAGID_SPARING_TABLE
if (udf_rw16(dscr->tag.id) == TAGID_SPARING_TABLE) {
udf_inittag(&spt->tag, TAGID_SPARING_TABLE, /* loc */ 0);
case TAGID_SPARING_TABLE :
if (udf_rw16(dscr->tag.id) == TAGID_SPARING_TABLE) {
case TAGID_SPARING_TABLE :