DM_RH_CLEAN
return state == DM_RH_CLEAN || state == DM_RH_DIRTY;
case DM_RH_CLEAN:
DM_RH_CLEAN : DM_RH_NOSYNC;
if (nreg->state == DM_RH_CLEAN) {
return r == 1 ? DM_RH_CLEAN : DM_RH_NOSYNC;
if (reg->state == DM_RH_CLEAN) {
reg->state = DM_RH_CLEAN;