linux-kernel - Re: [PATCH] m68k: add missing __user annotation in get

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Message-ID: <CAMuHMdW2jLKP_sbnphW_LguYfX8tVYTQofPUOkTkO1dfiaM6zA@mail.gmail.com>
Date:   Mon, 25 May 2020 10:47:49 +0200
From:   Geert Uytterhoeven <geert@...ux-m68k.org>
To:     Jason Wang <jasowang@...hat.com>
Cc:     linux-m68k <linux-m68k@...ts.linux-m68k.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        "Michael S. Tsirkin" <mst@...hat.com>,
        kbuild test robot <lkp@...el.com>
Subject: Re: [PATCH] m68k: add missing __user annotation in get_user()

On Wed, May 20, 2020 at 8:58 AM Jason Wang <jasowang@...hat.com> wrote:
> The ptr is a pointer to userspace memory. So we need annotate it with
> __user otherwise we may get sparse warnings like:
>
> drivers/vhost/vhost.c:1603:13: sparse: sparse: incorrect type in initializer (different address spaces) @@    expected void const *__gu_ptr @@    got unsigned int [noderef] [usertypvoid const *__gu_ptr @@
> drivers/vhost/vhost.c:1603:13: sparse:    expected void const *__gu_ptr
> drivers/vhost/vhost.c:1603:13: sparse:    got unsigned int [noderef] [usertype] <asn:1> *idxp
>
> Cc: Geert Uytterhoeven <geert@...ux-m68k.org>
> Cc: linux-m68k@...ts.linux-m68k.org
> Cc: linux-kernel@...r.kernel.org
> Reported-by: kbuild test robot <lkp@...el.com>
> Signed-off-by: Jason Wang <jasowang@...hat.com>

Fixes: 7124330dabe5b3cb ("m68k/uaccess: Revive 64-bit get_user()")

Reviewed-by: Geert Uytterhoeven <geert@...ux-m68k.org>
i.e. will queue in the m68k for-v5.8 branch.

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds