/* type constructor/destructor: mdt_type_init, mdt_type_fini */
LU_TYPE_INIT_FINI(mds, &mdt_thread_key);
-static struct lu_device_type_operations mds_device_type_ops = {
+static const struct lu_device_type_operations mds_device_type_ops = {
.ldto_init = mds_type_init,
.ldto_fini = mds_type_fini,