linux-next: build failure in final buil

linux-next: build failure in final buil

[Mark Brown]

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Hi all,

During the final builds today's linux-next build (powerpc
pseries_le_defconfig) failed like this:

/tmp/next/build/mm/hugetlb.c: In function 'hugetlb_unshare_pmds':
/tmp/next/build/mm/hugetlb.c:7282:17: error: implicit declaration of function '__huge_pmd_unshare'; did you mean 'huge_pmd_unshare'? [-Wimplicit-function-declaration]
 7282 |                 __huge_pmd_unshare(&tlb, vma, address, ptep, take_locks);
      |                 ^~~~~~~~~~~~~~~~~~
      |                 huge_pmd_unshare
make[4]: *** [/tmp/next/build/scripts/Makefile.build:289

Caused by commit

  2bb8fe16f7bf4 (mm/hugetlb: avoid false positive lockdep assertion)

I have reverted this commit for today.

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Re: linux-next: build failure in final buil

[Andrew Morton]

On Mon, 18 May 2026 17:11:12 +0100 Mark Brown <broonie@kernel.org> wrote:

> During the final builds today's linux-next build (powerpc
> pseries_le_defconfig) failed like this:
> 
> /tmp/next/build/mm/hugetlb.c: In function 'hugetlb_unshare_pmds':
> /tmp/next/build/mm/hugetlb.c:7282:17: error: implicit declaration of function '__huge_pmd_unshare'; did you mean 'huge_pmd_unshare'? [-Wimplicit-function-declaration]
>  7282 |                 __huge_pmd_unshare(&tlb, vma, address, ptep, take_locks);
>       |                 ^~~~~~~~~~~~~~~~~~
>       |                 huge_pmd_unshare
> make[4]: *** [/tmp/next/build/scripts/Makefile.build:289
> 
> Caused by commit
> 
>   2bb8fe16f7bf4 (mm/hugetlb: avoid false positive lockdep assertion)
> 
> I have reverted this commit for today.

I removed this from mm.git on May 15, but I cannot find the email which
prompted me to do that :(

Oh well, I assume Lorenzo will send a new version, thanks.

Re: linux-next: build failure in final buil

[Lorenzo Stoakes]

On Mon, May 18, 2026 at 01:01:24PM -0700, Andrew Morton wrote:
> On Mon, 18 May 2026 17:11:12 +0100 Mark Brown <broonie@kernel.org> wrote:
>
> > During the final builds today's linux-next build (powerpc
> > pseries_le_defconfig) failed like this:
> >
> > /tmp/next/build/mm/hugetlb.c: In function 'hugetlb_unshare_pmds':
> > /tmp/next/build/mm/hugetlb.c:7282:17: error: implicit declaration of function '__huge_pmd_unshare'; did you mean 'huge_pmd_unshare'? [-Wimplicit-function-declaration]
> >  7282 |                 __huge_pmd_unshare(&tlb, vma, address, ptep, take_locks);
> >       |                 ^~~~~~~~~~~~~~~~~~
> >       |                 huge_pmd_unshare
> > make[4]: *** [/tmp/next/build/scripts/Makefile.build:289
> >
> > Caused by commit
> >
> >   2bb8fe16f7bf4 (mm/hugetlb: avoid false positive lockdep assertion)
> >
> > I have reverted this commit for today.
>
> I removed this from mm.git on May 15, but I cannot find the email which
> prompted me to do that :(
>
> Oh well, I assume Lorenzo will send a new version, thanks.

I sent a fix-patch for this, but will send a respin today if that's easier.

This is a trivial 'forgot to add a stub for a certain config' thing.

Cheers, Lorenzo