pd_fsh
PUT_PD(r, pd->pd_fsh, len | cflags);
PUT_PD(r, pd->pd_fsh, len | cflags | EX_DPD_DNIND);
PUT_PD(r, pd->pd_fsh,
GET_PD(r, pd->pd_fsh) & ~(EX_DPD_DNIND));
PUT_PD(r, pd->pd_fsh, 0);