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

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Date:   Wed, 22 Jul 2020 23:25:27 +0000
From:   Dennis Zhou <dennis@...nel.org>
To:     Thomas Gleixner <tglx@...utronix.de>
Cc:     Dennis Zhou <dennis@...nel.org>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        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@...glegroups.com
Subject: Re: [PATCH v3 00/11] i386 Clang support

On Thu, Jul 23, 2020 at 01:08:42AM +0200, Thomas Gleixner wrote:
> Dennis Zhou <dennis@...nel.org> writes:
> > On Mon, Jul 20, 2020 at 01:49:14PM -0700, Nick Desaulniers 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
> >> 
> >
> > This looks great to me! I applied it to for-5.9.
> 
> You applied it? I'm not aware that you're maintaining x86 nowadays.
> 
> Thanks,
> 
>         tglx

I'm sorry I overstepped. I've dropped them. Please take them with my
ack.

Thanks,
Dennis