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Date:   Mon, 7 Sep 2020 09:14:00 +0200
From:   Christoph Hellwig <hch@lst.de>
To:     Geert Uytterhoeven <geert@linux-m68k.org>
Cc:     Christoph Hellwig <hch@lst.de>, kernel test robot <lkp@intel.com>,
        kbuild-all@lists.01.org,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Greg Ungerer <gerg@linux-m68k.org>,
        linux-m68k <linux-m68k@lists.linux-m68k.org>
Subject: Re: [char-misc:char-misc-next 28/28] drivers/char/mem.c:737:21:
 sparse: sparse: incorrect type in argument 1 (different address
 spaces)
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On Mon, Sep 07, 2020 at 09:04:15AM +0200, Geert Uytterhoeven wrote:
> Hi Christoph,
> 
> On Mon, Sep 7, 2020 at 8:25 AM Christoph Hellwig <hch@lst.de> wrote:
> > On Sun, Sep 06, 2020 at 05:14:15AM +0800, kernel test robot wrote:
> > > tree:   https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc.git char-misc-next
> > > head:   99f667352f6c938440d9043d0f66f859d6f3d50d
> > > commit: 99f667352f6c938440d9043d0f66f859d6f3d50d [28/28] /dev/zero: also implement ->read
> > > config: m68k-randconfig-s031-20200904 (attached as .config)
> > > compiler: m68k-linux-gcc (GCC) 9.3.0
> >
> > Looks like m68 does not have proper __user annotations for clear_user..
> 
> M68k has, m68knommu apparently hasn't.
> Same for strncpy_from_user() and strnlen_user().

Sorry, I mean to write m68knommu, that's why I added Greg to the
Cc list.