hat_page_setattr
void hat_page_setattr(struct page *, uint_t);
#define hat_setmod(pp) (hat_page_setattr(pp, P_MOD))
#define hat_setmod_only(pp) (hat_page_setattr(pp, P_MOD|P_NSH))
#define hat_setref(pp) (hat_page_setattr(pp, P_REF))
#define hat_setrefmod(pp) (hat_page_setattr(pp, P_REF|P_MOD))
hat_page_setattr(pp, rm);
hat_page_setattr(pp, rm);
hat_page_setattr(pp, rm);
hat_page_setattr(pp, P_REF);
hat_page_setattr(save_pp, P_REF);