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

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Message-ID: <d72de238-869d-8684-a74d-ef43ae33979f@intel.com>
Date:   Tue, 20 Oct 2020 16:55:15 +0800
From:   Rong Chen <rong.a.chen@...el.com>
To:     Geert Uytterhoeven <geert@...ux-m68k.org>,
        kernel test robot <lkp@...el.com>
Cc:     kbuild-all@...ts.01.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [kbuild-all] Re: drivers/pinctrl/renesas/pinctrl-rzn1.c:183:52:
 sparse: sparse: dubious: x | !y



On 10/20/20 3:49 PM, Geert Uytterhoeven wrote:
> 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/

Hi Geert,

Thanks for the information, we'll double check such warning in the future.

Best Regards,
Rong Chen