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ab2406e4 - Fix CUDA memory usage for CPU only compile (#163841)

Fix CUDA memory usage for CPU only compile (#163841) Summary: Fixes #150622. Copy from https://github.com/pytorch/pytorch/pull/150669. X-link: https://github.com/pytorch/pytorch/pull/163841 Approved by: https://github.com/leslie-fang-intel, https://github.com/jansel Reviewed By: seemethere Differential Revision: D93054349 fbshipit-source-id: e7d3b4992f1a35541657d3941191b4251c7c3d82