Function cusparseSpVV_bufferSize 

pub unsafe extern "C" fn cusparseSpVV_bufferSize(
    handle: cusparseHandle_t,
    opX: cusparseOperation_t,
    vecX: cusparseConstSpVecDescr_t,
    vecY: cusparseConstDnVecDescr_t,
    result: *const c_void,
    computeType: cudaDataType,
    bufferSize: *mut size_t,
) -> cusparseStatus_t