linux-kernel - Re: [PATCH 2/2] kbuild: fix asm-offset generation to work with clang

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Message-ID: <20170414174458.GL28657@google.com>
Date:   Fri, 14 Apr 2017 10:44:58 -0700
From:   Matthias Kaehlcke <mka@...omium.org>
To:     Masahiro Yamada <yamada.masahiro@...ionext.com>
Cc:     linux-kbuild@...r.kernel.org, David Howells <dhowells@...hat.com>,
        Michael Davidson <md@...gle.com>,
        Michal Marek <mmarek@...e.com>,
        Jan Beulich <JBeulich@...ell.com>,
        Alexander van Heukelum <heukelum@...tmail.fm>,
        Jeroen Hofstee <jeroen@...pectrum.nl>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] kbuild: fix asm-offset generation to work with clang

El Fri, Apr 14, 2017 at 02:50:03PM +0900 Masahiro Yamada ha dit:

> From: Jeroen Hofstee <jeroen@...pectrum.nl>
> 
> KBuild abuses the asm statement to write to a file and
> clang chokes about these invalid asm statements. Hack it
> even more by fooling this is actual valid asm code.
> 
> Signed-off-by: Jeroen Hofstee <jeroen@...pectrum.nl>
> [masahiro:
>  Import Jeroen's work for U-Boot:
>  http://patchwork.ozlabs.org/patch/375026/
>  Tweak sed script a little to drop garbage '#' for GCC case, like
>  #define NR_PAGEFLAGS 23 /* __NR_PAGEFLAGS       # */ ]
> Signed-off-by: Masahiro Yamada <yamada.masahiro@...ionext.com>

Reviewed-by: Matthias Kaehlcke <mka@...omium.org>
Tested-by: Matthias Kaehlcke <mka@...omium.org>

I tested with x86 and arm64. Please note that two more changes are
needed to avoid breaking frv and um:

https://patchwork.kernel.org/patch/9660473/
https://patchwork.kernel.org/patch/9660503/

Maybe these should be part of your patch set? I only sent them out
separately to avoid cross posting with my initial patch for this issue
being a RFC.

Cheers

Matthias