maskbits
pmap_clearbit(struct vm_page_md *md, paddr_t pa, u_int maskbits)
(uintptr_t)md, pa, maskbits, 0);
md->pvh_attrs &= ~(maskbits & (PVF_MOD | PVF_REF));
pv->pv_flags &= ~maskbits;
if ((maskbits & PVF_EXEC) != 0 && l2pte_valid_p(opte)) {
if (maskbits & (PVF_WRITE|PVF_MOD)) {
if (maskbits & PVF_WRITE) {
(maskbits & PVF_REF) != 0,
if ((maskbits & oflags & PVF_WRITE)) {
if (maskbits & PVF_REF) {
&& (maskbits & (PVF_WRITE|PVF_MOD)) == 0
maskbits(dx, cx, startmask, endmask, nlMiddle);
maskbits(dx, w, startmask, endmask, nlMiddle);