linux-kernel - Re: landlock: fs_test: fs_test.c:4524:9: error: initializer element is not a compile-time constant

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Message-ID: <CAKwvOd=h4aFisiY0w0awKkxk+i-aJM5+QbExYnboqzojLigx1Q@mail.gmail.com>
Date:   Thu, 17 Aug 2023 08:54:41 -0700
From:   Nick Desaulniers <ndesaulniers@...gle.com>
To:     Naresh Kamboju <naresh.kamboju@...aro.org>
Cc:     clang-built-linux <llvm@...ts.linux.dev>,
        open list <linux-kernel@...r.kernel.org>,
        "open list:KERNEL SELFTEST FRAMEWORK" 
        <linux-kselftest@...r.kernel.org>, linux-fsdevel@...r.kernel.org,
        lkft-triage@...ts.linaro.org, Shuah Khan <shuah@...nel.org>,
        Anders Roxell <anders.roxell@...aro.org>,
        Mickaël Salaün <mic@...ikod.net>,
        Richard Weinberger <richard@....at>
Subject: Re: landlock: fs_test: fs_test.c:4524:9: error: initializer element
 is not a compile-time constant

On Thu, Aug 17, 2023 at 3:51 AM Naresh Kamboju
<naresh.kamboju@...aro.org> wrote:
>
> While building selftests landlock following warnings / errors noticed on the
> Linux next with clang-17.
>
> Reported-by: Linux Kernel Functional Testing <lkft@...aro.org>
>
> Build errors:
> ------------
> landlock/fs_test
> fs_test.c:4524:9: error: initializer element is not a compile-time constant

Hi Naresh,
Can you tell me more about your specific version of clang-17?

I believe a fix of mine to clang should address this. It landed in
clang-18, and was backported to clang-17 recently.
https://github.com/llvm/llvm-project-release-prs/commit/0b2d5b967d98375793897295d651f58f6fbd3034

I suspect your clang-17 might need a rebuild.  Thanks for the report.

>  4524 |         .mnt = mnt_tmp,
>       |                ^~~~~~~
> 1 error generated.
>
> Links:
>  - https://storage.tuxsuite.com/public/linaro/lkft/builds/2U69ue7AaypfY7eRU4UUygecrDx/
>
> Steps to reproduce:
> tuxmake --runtime podman --target-arch arm64 --toolchain clang-17
> --kconfig https://storage.tuxsuite.com/public/linaro/lkft/builds/2U69ue7AaypfY7eRU4UUygecrDx/config
> LLVM=1 LLVM_IAS=1 dtbs dtbs-legacy headers kernel kselftest modules
>
> --
> Linaro LKFT
> https://lkft.linaro.org
>


-- 
Thanks,
~Nick Desaulniers