apply unroll in backward

[zhiding512]

apply unroll in backward

[netlify]

✅ Deploy Preview for pytorch-fbgemm-docs ready!

Name	Link
🔨 Latest commit	436aacd
🔍 Latest deploy log	https://app.netlify.com/projects/pytorch-fbgemm-docs/deploys/68a59cba42bd1900085ee6cb
😎 Deploy Preview	https://deploy-preview-4747--pytorch-fbgemm-docs.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.

---

To edit notification comments on pull requests, go to your Netlify project configuration.

[meta-cla]

Hi @zhiding512!

Thank you for your pull request and welcome to our community.

Action Required

In order to merge any pull request (code, docs, etc.), we require contributors to sign our Contributor License Agreement, and we don't seem to have one on file for you.

Process

In order for us to review and merge your suggested changes, please sign at https://code.facebook.com/cla. If you are contributing on behalf of someone else (eg your employer), the individual CLA may not be sufficient and your employer may need to sign the corporate CLA.

Once the CLA is signed, our tooling will perform checks and validations. Afterwards, the pull request will be tagged with CLA signed. The tagging process may take up to 1 hour after signing. Please give it that time before contacting us about it.

If you have received this in error or have any questions, please contact us at [email protected]. Thanks!

[q10]

@zhiding512 based on the build errors, I think we might need to wrap some of the header includes with ifdef

[q10]

@zhiding512 could you also sign the CLA so that we can import the code to our internal repo?