Re: [RFC PATCH v2 06/20] powerpc/8xx: Fix size given to set_huge_pte_at()

Michael Ellerman
2024-05-21T00:48:23Z

Christophe Leroy <christophe.leroy@csgroup.eu> writes:
> Hi Oscar, hi Michael,
>
> Le 20/05/2024 à 11:14, Oscar Salvador a écrit :
>> On Fri, May 17, 2024 at 09:00:00PM +0200, Christophe Leroy wrote:
>>> set_huge_pte_at() expects the real page size, not the psize which is
>>
>> "expects the size of the huge page" sounds bettter?
>
> Parameter 'pzize' already provides the size of the hugepage, but not in
> the way set_huge_pte_at() expects it.
>
> psize has one of the values defined by MMU_PAGE_XXX macros defined in
> arch/powerpc/include/asm/mmu.h while set_huge_pte_at() expects the size
> as a value.
>
>>
>>> the index of the page definition in table mmu_psize_defs[]
>>>
>>> Fixes: 935d4f0c6dc8 ("mm: hugetlb: add huge page size param to set_huge_pte_at()")
>>> Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
>>
>> Reviewed-by: Oscar Salvador <osalvador@suse.de>
>>
>> AFAICS, this fixup is not related to the series, right? (yes, you will
>> the parameter later)
>> I would have it at the very beginning of the series.
>
> You are right, I should have submitted it separately.
>
> Michael can you take it as a fix for 6.10 ?

Yeah I can. Does it actually cause a bug at runtime (I assume so)?

cheers