DSF_VISIT_DS_AGAIN
scn_phys->scn_flags |= DSF_VISIT_DS_AGAIN;
if (scn->scn_phys.scn_flags & DSF_VISIT_DS_AGAIN) {
scn->scn_phys.scn_flags &= ~DSF_VISIT_DS_AGAIN;
if (overflow & ~DSF_VISIT_DS_AGAIN ||
#define DSL_SCAN_FLAGS_MASK (DSF_VISIT_DS_AGAIN)