Hi @smth, I have found current master ConvNd is using ConvNd = torch._C._functions.ConvNd in torch.nn.functional.py, so I can not follow the same things like : https://github.com/pytorch/pytorch/pull/1507 27.
Finally, I found the core function that should be modified is ConvBackward::apply in torch.csrc.autograd.functions.convolution.cpp. So I have no idea how to convert the old style functions to new ones.