Re: [PATCH] mm/arch: Provide pud_pfn() fallback

[Andrew Morton]

On Sat, 23 Mar 2024 11:16:43 -0400 peterx@xxxxxxxxxx wrote:

> From: Peter Xu <peterx@xxxxxxxxxx>
> 
> The comment in the code explains the reasons.  We took a different approach
> comparing to pmd_pfn() by providing a fallback function.
> 
> Another option is to provide some lower level config options (compare to
> HUGETLB_PAGE or THP) to identify which layer an arch can support for such
> huge mappings.  However that can be an overkill.
> 
> ...
>
> If we care about per-commit build errors (and if it is ever feasible to
> reorder), we can move this patch to be before the patch "mm/gup: handle
> huge pud for follow_pud_mask()" in mm-unstable to unbreak build on that
> commit.

I temporarily disabled that whole series a few days ago.  Because of
multiple build issues, iirc.

Let's make that permanent.  Please redo the whole series against
mm-unstable and resend?