if (size % CLBYTES)
pagemove(from, to, size)	register caddr_t from, to;	size_t size;{	register pt_entry_t *fpte, *tpte;	if (size % CLBYTES)		panic("pagemove");	fpte = kvtopte(from);	tpte = kvtopte(to);	while (size > 0) {		*tpte++ = *fpte;		*fpte++ = 0;		from += NBPG;		to += NBPG;		size -= NBPG;	}	pmap_update();}