pub unsafe extern "C" fn cudnnGetNormalizationBackwardWorkspaceSize(
handle: cudnnHandle_t,
mode: cudnnNormMode_t,
normOps: cudnnNormOps_t,
algo: cudnnNormAlgo_t,
xDesc: cudnnTensorDescriptor_t,
yDesc: cudnnTensorDescriptor_t,
dyDesc: cudnnTensorDescriptor_t,
dzDesc: cudnnTensorDescriptor_t,
dxDesc: cudnnTensorDescriptor_t,
dNormScaleBiasDesc: cudnnTensorDescriptor_t,
activationDesc: cudnnActivationDescriptor_t,
normMeanVarDesc: cudnnTensorDescriptor_t,
sizeInBytes: *mut usize,
groupCnt: c_int
) -> cudnnStatus_t