linux-kernel - Re: [PATCH 2/2] include: warn for inconsistent endian config definition

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Date:   Mon, 12 Jun 2017 16:31:12 -0500
From:   Babu Moger <babu.moger@...cle.com>
To:     Max Filippov <jcmvbkbc@...il.com>, Arnd Bergmann <arnd@...db.de>
Cc:     kbuild test robot <lkp@...el.com>, kbuild-all@...org,
        Yoshinori Sato <ysato@...rs.sourceforge.jp>,
        Geert Uytterhoeven <geert@...ux-m68k.org>,
        Jonas Bonn <jonas@...thpole.se>,
        Stefan Kristiansson <stefan.kristiansson@...nalahti.fi>,
        Stafford Horne <shorne@...il.com>,
        "James E.J. Bottomley" <jejb@...isc-linux.org>,
        Helge Deller <deller@....de>,
        David Miller <davem@...emloft.net>,
        Al Viro <viro@...iv.linux.org.uk>,
        Michael Ellerman <mpe@...erman.id.au>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        "moderated list:H8/300 ARCHITECTURE" 
        <uclinux-h8-devel@...ts.sourceforge.jp>,
        linux-m68k@...r.kernel.org, openrisc@...ts.librecores.org,
        Parisc List <linux-parisc@...r.kernel.org>,
        sparclinux <sparclinux@...r.kernel.org>,
        Michal Simek <monstr@...str.eu>
Subject: Re: [PATCH 2/2] include: warn for inconsistent endian config
 definition


On 6/12/2017 3:58 PM, Max Filippov wrote:
> On Mon, Jun 12, 2017 at 1:51 PM, Arnd Bergmann <arnd@...db.de> wrote:
>> That way, we don't have to guess what the toolchain does, but rather
>> tell it to do whatever is configured, like we do for most other architectures.
>>
>> Unfortunately we can't do the same thing on xtensa, as that no longer
>> supports the -mbig-endian/-mbig-endian flags in any recent gcc version
>> (a long time ago it had them, but they were removed along with many other
>> options).
> For xtensa we probably need to generate Kconfig fragment that would go
> in with the variant subdirectory. That will solve this, and clean up other
> options that we currently have for manual selection for xtensa, but there's
> actually no choice, i.e. the option has to be selected correctly, there's only
> one correct choice and otherwise the kernel either won't build or won't work.
> I'll look into it.
Max. Thanks. Please update us when you are done.
>