pmap_remove_pte
static int pmap_remove_pte (struct pmap *pmap, pt_entry_t *ptq,
pmap_remove_pte(pmap, pte, 0, va);
if (pmap_remove_pte(pmap, pte, 0, sva))
err = pmap_remove_pte(pmap, NULL, origpte, va);