linux-kernel - Re: drivers/pinctrl/renesas/pinctrl-rzn1.c:183:52: sparse: sparse: dubious: x

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Message-ID: <CAMuHMdWRXQEoa2w6NHP-GwkyS=SN5GpZk=GOxOUsisHJRntsOw@mail.gmail.com>
Date:   Tue, 20 Oct 2020 09:49:45 +0200
From:   Geert Uytterhoeven <geert@...ux-m68k.org>
To:     kernel test robot <lkp@...el.com>
Cc:     kbuild-all@...ts.01.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: drivers/pinctrl/renesas/pinctrl-rzn1.c:183:52: sparse: sparse:
 dubious: x | !y

Hi Kernel Test Robot,

On Tue, Oct 20, 2020 at 9:42 AM kernel test robot <lkp@...el.com> wrote:
> First bad commit (maybe != root cause):
>
> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
> head:   270315b8235e3d10c2e360cff56c2f9e0915a252
> commit: 077365a941166f3a7f5894017f9d26d17cdec00e pinctrl: Rename sh-pfc to renesas
> date:   5 weeks ago
> config: x86_64-randconfig-s032-20201020 (attached as .config)
> compiler: gcc-9 (Debian 9.3.0-15) 9.3.0
> reproduce:
>         # apt-get install sparse
>         # sparse version: v0.6.3-dirty
>         # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=077365a941166f3a7f5894017f9d26d17cdec00e
>         git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
>         git fetch --no-tags linus master
>         git checkout 077365a941166f3a7f5894017f9d26d17cdec00e
>         # save the attached .config to linux build tree
>         make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=x86_64
>
> If you fix the issue, kindly add following tag as appropriate
> Reported-by: kernel test robot <lkp@...el.com>
>
>
> "sparse warnings: (new ones prefixed by >>)"
> >> drivers/pinctrl/renesas/pinctrl-rzn1.c:183:52: sparse: sparse: dubious: x | !y
>    drivers/pinctrl/renesas/pinctrl-rzn1.c:189:52: sparse: sparse: dubious: x | !y

This is a false positive, cfr.
https://lore.kernel.org/linux-renesas-soc/CAMuHMdV=aWj9ePL9gAa-vsmLLUZkY4ip2337am8A7ktxg7Yniw@mail.gmail.com/

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