NDD_LOCKED
set_bit(NDD_LOCKED, &nvdimm->flags);
clear_bit(NDD_LOCKED, &nvdimm->flags);
test_bit(NDD_LOCKED, &nvdimm->flags) ? "lock " : "");
if (test_bit(NDD_LOCKED, &nvdimm->flags))
test_bit(NDD_LOCKED, &nvdimm->flags)
if (test_bit(NDD_LOCKED, &nvdimm->flags)) {