Re: [PATCH v3 1/4] mm: don't special case !MMU for is_zero_pfn() and my_zero_pfn()

David Hildenbrand (Arm)
2026-02-12T08:58:46Z

On 2/11/26 11:31, Mike Rapoport wrote:
> From: "Mike Rapoport (Microsoft)" <rppt@kernel.org>
>
> nommu architectures have empty_zero_page and define ZERO_PAGE() and
> although they don't really use it to populate page tables, there is no
> reason to hardwire !MMU implementation of is_zero_pfn() and my_zero_pfn()
> to 0.
>
> Drop #ifdef CONFIG_MMU around implementations of is_zero_pfn() and
> my_zero_pfn() and remove !MMU version.
>
> While on it, make zero_pfn __ro_after_init.
>
> Signed-off-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
> ---

Acked-by: David Hildenbrand (Arm) <david@kernel.org>

--
Cheers,

David