if (IS_ERR(ost->ost_create_service)) {
rc = PTR_ERR(ost->ost_create_service);
CERROR("failed to start OST create service: %d\n", rc);
if (IS_ERR(ost->ost_create_service)) {
rc = PTR_ERR(ost->ost_create_service);
CERROR("failed to start OST create service: %d\n", rc);