linux-kernel - Re: [PATCH v3 00/11] i386 Clang support

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Date:   Tue, 21 Jul 2020 10:09:14 +0200
From:   Sedat Dilek <sedat.dilek@...il.com>
To:     Nick Desaulniers <ndesaulniers@...gle.com>
Cc:     Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        Dennis Zhou <dennis@...nel.org>, Tejun Heo <tj@...nel.org>,
        Christoph Lameter <cl@...ux.com>, x86@...nel.org,
        "H. Peter Anvin" <hpa@...or.com>,
        Al Viro <viro@...iv.linux.org.uk>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Peter Zijlstra <peterz@...radead.org>,
        linux-kernel@...r.kernel.org,
        Clang-Built-Linux ML <clang-built-linux@...glegroups.com>
Subject: Re: [PATCH v3 00/11] i386 Clang support

On Mon, Jul 20, 2020 at 10:49 PM 'Nick Desaulniers' via Clang Built
Linux <clang-built-linux@...glegroups.com> wrote:
>
> Resend of Brian's v2 with Acks from Peter and Linus collected, as well
> as the final patch (mine) added. The commit of the final patch discusses
> some of the architectural differences between GCC and Clang, and the
> kernels tickling of this difference for i386, which necessitated these
> patches.
>
> Brian Gerst (10):
>   x86/percpu: Introduce size abstraction macros
>   x86/percpu: Clean up percpu_to_op()
>   x86/percpu: Clean up percpu_from_op()
>   x86/percpu: Clean up percpu_add_op()
>   x86/percpu: Remove "e" constraint from XADD
>   x86/percpu: Clean up percpu_add_return_op()
>   x86/percpu: Clean up percpu_xchg_op()
>   x86/percpu: Clean up percpu_cmpxchg_op()
>   x86/percpu: Clean up percpu_stable_op()
>   x86/percpu: Remove unused PER_CPU() macro
>
> Nick Desaulniers (1):
>   x86: support i386 with Clang
>
>  arch/x86/include/asm/percpu.h  | 510 +++++++++++----------------------
>  arch/x86/include/asm/uaccess.h |   4 +-
>  2 files changed, 175 insertions(+), 339 deletions(-)
>
> --
> 2.28.0.rc0.105.gf9edc3c819-goog
>

Hi,

I have tested this patchset v3 on top of Linux v5.8-rc6 with a
selfmade llvm-toolchain (snapshot version: v11+git-e05c7e400f3a plus
cherry-picked 8b354cc8db41).

This happened out of interest if this is in good shape together with
my Debian AMD64 system.
I checked my build-log and dmesg-output and it looks good.

Feel free to add my...

Tested-by: Sedat Dilek <sedat.dilek@...il.com>

Thanks.

Regards,
- Sedat -