linux-kernel - Re: [PATCH 4/6] drm/amd/display: fix dcn21 Makefile for clang

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Message-ID: <CAKwvOd=+VeD4xchCAyKeBtTD8+qwS6BTVgM=4ZDY1kBQJq3wMQ@mail.gmail.com>
Date:   Wed, 2 Oct 2019 14:27:37 -0700
From:   Nick Desaulniers <ndesaulniers@...gle.com>
To:     Alex Deucher <alexdeucher@...il.com>
Cc:     Arnd Bergmann <arnd@...db.de>,
        Alex Deucher <alexander.deucher@....com>,
        "David (ChunMing) Zhou" <David1.Zhou@....com>,
        clang-built-linux <clang-built-linux@...glegroups.com>,
        Leo Li <sunpeng.li@....com>,
        Bhawanpreet Lakha <Bhawanpreet.Lakha@....com>,
        LKML <linux-kernel@...r.kernel.org>,
        amd-gfx list <amd-gfx@...ts.freedesktop.org>,
        David Airlie <airlied@...ux.ie>,
        dri-devel <dri-devel@...ts.freedesktop.org>,
        Daniel Vetter <daniel@...ll.ch>,
        Harry Wentland <harry.wentland@....com>,
        Christian König <christian.koenig@....com>
Subject: Re: [PATCH 4/6] drm/amd/display: fix dcn21 Makefile for clang

On Wed, Oct 2, 2019 at 2:24 PM Alex Deucher <alexdeucher@...il.com> wrote:
>
> On Wed, Oct 2, 2019 at 5:19 PM Nick Desaulniers <ndesaulniers@...gle.com> wrote:
> >
> > Alex, do you know why the AMDGPU driver uses a different stack
> > alignment (16B) than the rest of the x86 kernel?  (see
> > arch/x86/Makefile which uses 8B stack alignment).
>
> Not sure.  Maybe Harry can comment.  I think it was added for the
> floating point stuff.  Not sure if it's strictly required or not.

Can you find out for me please who knows more about this and setup a
chat with all of us? (I don't want to deride this patch's review
thread, so let's start a new thread once we know more) We're facing
some interesting runtime issues when built with Clang.

-- 
Thanks,
~Nick Desaulniers