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From: Lance Yang <ioworker0@gmail.com>
Date: Tue, 30 Apr 2024 10:23:11 +0800
Message-ID: <CAK1f24nPG0N9h=8zV4xM7xzkrig_McHdFxNbbWf0VOfw4QuOcA@mail.gmail.com>
Subject: Re: linux-next: build failure after merge of the mm tree
To: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: Andrew Morton <akpm@linux-foundation.org>, 
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>, 
	Linux Next Mailing List <linux-next@vger.kernel.org>
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Hey Stephen,

Thanks a lot for reporting!

I'll fix this bug in the next version.

Best,
Lance Yang

On Tue, Apr 30, 2024 at 8:38=E2=80=AFAM Stephen Rothwell <sfr@canb.auug.org=
au> wrote:
>
> Hi all,
>
> After merging the mm tree, today's linux-next build (arm
> multi_v7_defconfig) failed like this:
>
> In file included from <command-line>:
> mm/rmap.c: In function 'try_to_unmap_one':
> include/linux/compiler_types.h:460:45: error: call to '__compiletime_asse=
rt_344' declared with attribute error: BUILD_BUG failed
>   460 |         _compiletime_assert(condition, msg, __compiletime_assert_=
, __COUNTER__)
>       |                                             ^
> include/linux/compiler_types.h:441:25: note: in definition of macro '__co=
mpiletime_assert'
>   441 |                         prefix ## suffix();                      =
       \
>       |                         ^~~~~~
> include/linux/compiler_types.h:460:9: note: in expansion of macro '_compi=
letime_assert'
>   460 |         _compiletime_assert(condition, msg, __compiletime_assert_=
, __COUNTER__)
>       |         ^~~~~~~~~~~~~~~~~~~
> include/linux/build_bug.h:39:37: note: in expansion of macro 'compiletime=
_assert'
>    39 | #define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), m=
sg)
>       |                                     ^~~~~~~~~~~~~~~~~~
> include/linux/build_bug.h:59:21: note: in expansion of macro 'BUILD_BUG_O=
N_MSG'
>    59 | #define BUILD_BUG() BUILD_BUG_ON_MSG(1, "BUILD_BUG failed")
>       |                     ^~~~~~~~~~~~~~~~
> include/linux/huge_mm.h:99:28: note: in expansion of macro 'BUILD_BUG'
>    99 | #define HPAGE_PMD_SHIFT ({ BUILD_BUG(); 0; })
>       |                            ^~~~~~~~~
> include/linux/huge_mm.h:106:35: note: in expansion of macro 'HPAGE_PMD_SH=
IFT'
>   106 | #define HPAGE_PMD_SIZE  ((1UL) << HPAGE_PMD_SHIFT)
>       |                                   ^~~~~~~~~~~~~~~
> include/linux/huge_mm.h:105:28: note: in expansion of macro 'HPAGE_PMD_SI=
ZE'
>   105 | #define HPAGE_PMD_MASK  (~(HPAGE_PMD_SIZE - 1))
>       |                            ^~~~~~~~~~~~~~
> mm/rmap.c:1651:41: note: in expansion of macro 'HPAGE_PMD_MASK'
>  1651 |                 range.start =3D address & HPAGE_PMD_MASK;
>       |                                         ^~~~~~~~~~~~~~
>
> Caused by commit
>
>   34d66beb14bd ("mm/rmap: integrate PMD-mapped folio splitting into pagew=
alk loop")
>
> from the mm-unstable branch of the mm tree.
>
> I have reverted that commit and the following one for today.
>
> --
> Cheers,
> Stephen Rothwell