Re: [PATCH v4] mm, hugetlb: fix racy resv_huge_pages underflow on UFFDIO_COPY

[Mina Almasry]

> > Mina, does this patch depend on changes to restore_reserve_on_error()?
> >
>
> Yes, this patch (and only this patch) depends on your changes for
> complete and correct functionality. I'm not sure what's the impact

...of missing your changes aside from the underflow. The userfaultfd
tests still pass.