add_client_resource
ret = add_client_resource(client, &r->resource, GFP_KERNEL);
ret = add_client_resource(client, &e->r.resource, GFP_KERNEL);
ret = add_client_resource(handler->client, &r->resource, GFP_ATOMIC);
ret = add_client_resource(client, &r->resource, GFP_KERNEL);
ret = add_client_resource(client, &r->resource, GFP_KERNEL);