ActivationDescriptor CreateActivationDescriptor() {
  cudnnActivationDescriptor_t result;
  CHECK_CUDNN_OK(cudnnCreateActivationDescriptor(&result));
  return ActivationDescriptor(result);
}
ActivationDescriptor CreateActivationDescriptor() {
  cudnnActivationDescriptor_t result;
  CHECK_CUDNN_OK(cudnnCreateActivationDescriptor(&result));
  return ActivationDescriptor(result);
}