linux-kernel - Re: [PATCH] rtc: s5m: use devm_i2c_new_dummy

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Message-ID: <CAMpxmJUxKD9-J+MESZMxMePZX4WO_QFj6FudrAKS=Tp_kW8iOQ@mail.gmail.com>
Date:   Wed, 6 Jan 2021 07:52:46 +0100
From:   Bartosz Golaszewski <bgolaszewski@...libre.com>
To:     kernel test robot <lkp@...el.com>
Cc:     Bartosz Golaszewski <brgl@...ev.pl>,
        Krzysztof Kozlowski <krzk@...nel.org>,
        Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
        Alessandro Zummo <a.zummo@...ertech.it>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        kbuild-all@...ts.01.org, clang-built-linux@...glegroups.com,
        LKML <linux-kernel@...r.kernel.org>,
        linux-samsung-soc@...r.kernel.org, linux-rtc@...r.kernel.org
Subject: Re: [PATCH] rtc: s5m: use devm_i2c_new_dummy_device()

On Wed, Jan 6, 2021 at 7:47 AM kernel test robot <lkp@...el.com> wrote:
>
> Hi Bartosz,
>
> I love your patch! Perhaps something to improve:
>
> [auto build test WARNING on abelloni/rtc-next]
> [also build test WARNING on v5.11-rc2 next-20210104]
> [If your patch is applied to the wrong git tree, kindly drop us a note.
> And when submitting patch, we suggest to use '--base' as documented in
> https://git-scm.com/docs/git-format-patch]
>
> url:    https://github.com/0day-ci/linux/commits/Bartosz-Golaszewski/rtc-s5m-use-devm_i2c_new_dummy_device/20210105-214736
> base:   https://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux.git rtc-next
> config: x86_64-randconfig-a004-20210105 (attached as .config)
> compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project 5c951623bc8965fa1e89660f2f5f4a2944e4981a)
> reproduce (this is a W=1 build):
>         wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
>         chmod +x ~/bin/make.cross
>         # install x86_64 cross compiling tool for clang build
>         # apt-get install binutils-x86-64-linux-gnu
>         # https://github.com/0day-ci/linux/commit/21651184178d1001f3bbc858c9161f1b7fd65321
>         git remote add linux-review https://github.com/0day-ci/linux
>         git fetch --no-tags linux-review Bartosz-Golaszewski/rtc-s5m-use-devm_i2c_new_dummy_device/20210105-214736
>         git checkout 21651184178d1001f3bbc858c9161f1b7fd65321
>         # save the attached .config to linux build tree
>         COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64
>
> If you fix the issue, kindly add following tag as appropriate
> Reported-by: kernel test robot <lkp@...el.com>
>
> All warnings (new ones prefixed by >>):
>
> >> drivers/rtc/rtc-s5m.c:773:4: warning: variable 'ret' is uninitialized when used here [-Wuninitialized]
>                            ret);
>                            ^~~
>    include/linux/dev_printk.h:112:32: note: expanded from macro 'dev_err'
>            _dev_err(dev, dev_fmt(fmt), ##__VA_ARGS__)
>                                          ^~~~~~~~~~~
>    drivers/rtc/rtc-s5m.c:719:9: note: initialize the variable 'ret' to silence this warning
>            int ret, alarm_irq;
>                   ^
>                    = 0
>    1 warning generated.
>
>
> vim +/ret +773 drivers/rtc/rtc-s5m.c
>

This isn't caused by this patch, it seems to be an older bug. I can
try to fix it while at it.

Bart