Re: [PATCH v2] Revert "mm/pgtable: add stubs for {pmd/pub}_{set/clear}_huge"

[Will Deacon]

On Wed, 21 Jul 2021 17:02:13 +1000, Michael Ellerman wrote:
> This reverts commit c742199a014de23ee92055c2473d91fe5561ffdf.
> 
> c742199a014d ("mm/pgtable: add stubs for {pmd/pub}_{set/clear}_huge")
> breaks arm64 in at least two ways for configurations where PUD or PMD
> folding occur:
> 
>   1. We no longer install huge-vmap mappings and silently fall back to
>      page-granular entries, despite being able to install block entries
>      at what is effectively the PGD level.
> 
> [...]

Thank you Michael! I owe you a beer next time I see you, if we don't go
extinct before then.

Applied to arm64 (for-next/fixes), thanks!

[1/1] Revert "mm/pgtable: add stubs for {pmd/pub}_{set/clear}_huge"
      https://git.kernel.org/arm64/c/d8a719059b9d

Cheers,
-- 
Will

https://fixes.arm64.dev
https://next.arm64.dev
https://will.arm64.dev