pytorch

9740011f - Use normal dispatch to get to CUDA threshold kernels, instead of DispatchStub. (#30307)

Use normal dispatch to get to CUDA threshold kernels, instead of DispatchStub. (#30307) Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/30307 DispatchStub will stop working when I split CPU/CUDA libraries, because there are some symbols from the templates in DispatchStub stubs which aren't properly exported and I couldn't figure out how to make them dispatch properly. This is the only case where DispatchStub is being used to dispatch to CUDA, anyway. This partially addresses #29844 but I need to also just completely delete the CUDA registration logic from DispatchStub entirely. Signed-off-by: Edward Z. Yang <ezyang@fb.com> Test Plan: Imported from OSS Differential Revision: D18762362 Pulled By: ezyang fbshipit-source-id: bdfa8739c0daf23badf3c5af61890a934af00813