linux-kernel - Re: [PATCH] f2fs: fix 32-bit linking

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Message-ID: <20190628131738.GA994@infradead.org>
Date:   Fri, 28 Jun 2019 06:17:38 -0700
From:   Christoph Hellwig <hch@...radead.org>
To:     Arnd Bergmann <arnd@...db.de>
Cc:     Christoph Hellwig <hch@...radead.org>,
        Jaegeuk Kim <jaegeuk@...nel.org>, Chao Yu <yuchao0@...wei.com>,
        Qiuyang Sun <sunqiuyang@...wei.com>,
        Sahitya Tummala <stummala@...eaurora.org>,
        Eric Biggers <ebiggers@...gle.com>,
        Wang Shilong <wangshilong1991@...il.com>,
        "Linux F2FS DEV, Mailing List" 
        <linux-f2fs-devel@...ts.sourceforge.net>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Russell King - ARM Linux <linux@...linux.org.uk>
Subject: Re: [PATCH] f2fs: fix 32-bit linking

On Fri, Jun 28, 2019 at 03:09:47PM +0200, Arnd Bergmann wrote:
> 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?

Can't we just fall back to using copy_from_user with a little wrapper
that switches based on sizeof()?