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From:   Arnd Bergmann <arnd@arndb.de>
Date:   Fri, 28 Jun 2019 15:09:47 +0200
Message-ID: <CAK8P3a1jwPQvX6f+eMZLdnF2ZawDB9obF3hjk2P9RJxDr6HUQA@mail.gmail.com>
Subject: Re: [PATCH] f2fs: fix 32-bit linking
To:     Christoph Hellwig <hch@infradead.org>
Cc:     Jaegeuk Kim <jaegeuk@kernel.org>, Chao Yu <yuchao0@huawei.com>,
        Qiuyang Sun <sunqiuyang@huawei.com>,
        Sahitya Tummala <stummala@codeaurora.org>,
        Eric Biggers <ebiggers@google.com>,
        Wang Shilong <wangshilong1991@gmail.com>,
        "Linux F2FS DEV, Mailing List" 
        <linux-f2fs-devel@lists.sourceforge.net>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        Russell King - ARM Linux <linux@armlinux.org.uk>
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On Fri, Jun 28, 2019 at 2:44 PM Christoph Hellwig <hch@infradead.org> wrote:
>
> On Fri, Jun 28, 2019 at 12:39:52PM +0200, Arnd Bergmann wrote:
> > Not all architectures support get_user() with a 64-bit argument:
>
> Which architectures are still missing?  I think we finally need to
> get everyone in line instead of repeatedly working around the lack
> of minor arch support.

I came across this on arm-nommu (which disables
CONFIG_CPU_SPECTRE) during randconfig testing.

I don't see an easy way to add this in there, short of rewriting the
whole __get_user_err() function. Any suggestions?

      Arnd