PV_REF
#define MR4_4C(pte) (((pte) >> PG_M_SHIFT) & (PV_MOD | PV_REF))
rv = VM_MDPAGE_PVHEAD(pg)->pv_flags & PV_REF;
VM_MDPAGE_PVHEAD(pg)->pv_flags &= ~PV_REF;
return (VM_MDPAGE_PVHEAD(pg)->pv_flags & PV_REF ||
pv_syncflags4_4c(pg) & PV_REF);
pvh->pv_va |= PV_REF;
pv->pv_va |= PV_REF;
if (pv->pv_va & PV_REF) {
pv->pv_va &= ~PV_REF;
if (pv->pv_va & PV_REF) {
pv->pv_va &= ~PV_REF;
if (pv->pv_va & PV_REF)
if (npv->pv_va & PV_REF) {
npv->pv_va &= ~PV_REF;
pv->pv_va |= PV_REF;
if (pv->pv_va & PV_REF)
pv->pv_va |= PV_REF;
pv->pv_va |= PV_REF;
pv->pv_va |= PV_REF;
pvh->pv_va &= (PV_REF|PV_MOD);
pvh->pv_va |= PV_REF;
rv = *pv_flags & PV_REF;
*pv_flags &= ~PV_REF;
if ((*pv_flags & PV_REF) == 0)
rv = (*pv_flags & PV_REF);
rv = *pv_flags & PV_REF;
*pv_flags &= ~PV_REF;
if ((*pv_flags & PV_REF) == 0)
rv = (*pv_flags & PV_REF);