There's a merged pull request on the void-packages repository

nvidia390: add patches for linux5.9
https://github.com/void-linux/void-packages/pull/27673

Description:
On i686, module builds in VM with few kernels, but wasn't runtime tested.
On x86_64, module builds and runs with few kernels.

Patches comes from Mageia.

cc @abenson, @pullmoll