linux-kernel - Re: [PATCH v4] rtc: rx6110: add ACPI bindings to I2C

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Date:   Tue, 16 Mar 2021 22:44:21 +0200
From:   Andy Shevchenko <andriy.shevchenko@...el.com>
To:     kernel test robot <lkp@...el.com>
Cc:     Claudius Heine <ch@...x.de>,
        johannes hahn <johannes-hahn@...mens.com>,
        Alessandro Zummo <a.zummo@...ertech.it>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        "open list:REAL TIME CLOCK (RTC) SUBSYSTEM" 
        <linux-rtc@...r.kernel.org>,
        open list <linux-kernel@...r.kernel.org>,
        kbuild-all@...ts.01.org, clang-built-linux@...glegroups.com,
        werner zeh <werner.zeh@...mens.com>,
        henning schild <henning.schild@...mens.com>,
        martin mantel <martin.mantel@...mens.com>,
        val krutov <val.krutov@....epson.com>
Subject: Re: [PATCH v4] rtc: rx6110: add ACPI bindings to I2C

On Wed, Mar 17, 2021 at 03:04:36AM +0800, kernel test robot wrote:
> Hi Claudius,
> 
> Thank you for the patch! Perhaps something to improve:
> 
> [auto build test WARNING on abelloni/rtc-next]
> [also build test WARNING on v5.12-rc3 next-20210316]
> [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/Claudius-Heine/rtc-rx6110-add-ACPI-bindings-to-I2C/20210316-225026
> base:   https://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux.git rtc-next
> config: powerpc-randconfig-r006-20210316 (attached as .config)
> compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 50c7504a93fdb90c26870db8c8ea7add895c7725)
> 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 powerpc cross compiling tool for clang build
>         # apt-get install binutils-powerpc-linux-gnu
>         # https://github.com/0day-ci/linux/commit/ec344b93b1b5f4c2c77ce68b7bde7ec380e356a8
>         git remote add linux-review https://github.com/0day-ci/linux
>         git fetch --no-tags linux-review Claudius-Heine/rtc-rx6110-add-ACPI-bindings-to-I2C/20210316-225026
>         git checkout ec344b93b1b5f4c2c77ce68b7bde7ec380e356a8
>         # save the attached .config to linux build tree
>         COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=powerpc 
> 
> 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-rx6110.c:450:36: warning: unused variable 'rx6110_i2c_acpi_match' [-Wunused-const-variable]
>    static const struct acpi_device_id rx6110_i2c_acpi_match[] = {
>                                       ^
>    1 warning generated.

Precisely!

This happens due to ACPI_PTR() presence. Either ACPI_PTR() _and_ ifdeffery or
none of them should be in the code.


-- 
With Best Regards,
Andy Shevchenko