ATTR_LABEL
struct temp_data *tdata = container_of(devattr, struct temp_data, sd_attrs[ATTR_LABEL]);
case ATTR_LABEL:
ni_remove_attr(ni, ATTR_LABEL, NULL, 0, false, NULL);
err = ni_insert_resident(ni, uni_bytes, ATTR_LABEL, NULL, 0, &attr,
attr = ni_find_attr(ni, NULL, NULL, ATTR_LABEL, NULL, 0, NULL, NULL);