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Date: Wed, 24 Jan 2024 12:20:40 +1100
From: Stephen Rothwell <sfr@canb.auug.org.au>
To: Christian Brauner <brauner@kernel.org>
Cc: Baokun Li <libaokun1@huawei.com>, Linux Kernel Mailing List
 <linux-kernel@vger.kernel.org>, Linux Next Mailing List
 <linux-next@vger.kernel.org>
Subject: Re: linux-next: build failure after merge of the vfs-brauner tree
Message-ID: <20240124122040.04cd2c8a@canb.auug.org.au>
In-Reply-To: <20240123125227.0521c8d9@canb.auug.org.au>
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Hi all,

On Tue, 23 Jan 2024 12:52:27 +1100 Stephen Rothwell <sfr@canb.auug.org.au> =
wrote:
>=20
> After merging the vfs-brauner tree, today's linux-next build (powerpc
> allnoconfig) failed like this:
>=20
> In file included from <command-line>:
> In function 'i_size_read',
>     inlined from '__iomap_dio_rw' at fs/iomap/direct-io.c:570:16:
> include/linux/compiler_types.h:435:45: error: call to '__compiletime_asse=
rt_229' declared with attribute error: Need native word sized stores/loads =
for atomicity.
>   435 |         _compiletime_assert(condition, msg, __compiletime_assert_=
, __COUNTER__)
>       |                                             ^
> include/linux/compiler_types.h:416:25: note: in definition of macro '__co=
mpiletime_assert'
>   416 |                         prefix ## suffix();                      =
       \
>       |                         ^~~~~~
> include/linux/compiler_types.h:435:9: note: in expansion of macro '_compi=
letime_assert'
>   435 |         _compiletime_assert(condition, msg, __compiletime_assert_=
, __COUNTER__)
>       |         ^~~~~~~~~~~~~~~~~~~
> include/linux/compiler_types.h:438:9: note: in expansion of macro 'compil=
etime_assert'
>   438 |         compiletime_assert(__native_word(t),                     =
       \
>       |         ^~~~~~~~~~~~~~~~~~
> include/asm-generic/barrier.h:206:9: note: in expansion of macro 'compile=
time_assert_atomic_type'
>   206 |         compiletime_assert_atomic_type(*p);                      =
       \
>       |         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> include/linux/fs.h:911:16: note: in expansion of macro 'smp_load_acquire'
>   911 |         return smp_load_acquire(&inode->i_size);
>       |                ^~~~~~~~~~~~~~~~
>=20
> Caused by commit
>=20
>   4bbd51d0f0ad ("fs: make the i_size_read/write helpers be smp_load_acqui=
re/store_release()")
>=20
> I have used the vfs-brauner tree from next-20240122 for today.

Pending a better resolution, today I have reverted that commit and the
following one.

--=20
Cheers,
Stephen Rothwell

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