Function cudnnConvolutionBackwardFilter 

pub unsafe extern "C" fn cudnnConvolutionBackwardFilter(
    handle: cudnnHandle_t,
    alpha: *const c_void,
    srcDesc: cudnnTensorDescriptor_t,
    srcData: *const c_void,
    diffDesc: cudnnTensorDescriptor_t,
    diffData: *const c_void,
    convDesc: cudnnConvolutionDescriptor_t,
    beta: *const c_void,
    gradDesc: cudnnFilterDescriptor_t,
    gradData: *mut c_void,
) -> cudnnStatus_t