550 Open Source Requires MMU_NOTIFIER Whereas Proprietary Does Not

I have a Turing card but attempting to build the open-source drivers on Gentoo gives me the error/warning that MMU_NOTIFIER must enabled in the kernel, which would first require enabling KVM (kernel-based virtual machine).

The proprietary driver builds without MMU_NOTIFIER.

Since I don’t use virtual machines I would rather not have them enabled in my kernel, but eventually the open-source driver will be default.

Why does the open-source driver suddenly have this new requirement?

Could this be a resurrection of a problem reported and patched for the 450 drivers:

Please advise if MMU_NOTIFIER will be a hard requirement with open-source drivers.