linux-kernel - Re: [pdx86-platform-drivers-x86:review-hans 41/44] drivers/platform/x86/lenovo-yogabook-wmi.c:278:20: warning: no previous prototype for 'yogabook_wmi

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Date:   Tue, 7 Dec 2021 12:38:53 +0200
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     kernel test robot <lkp@...el.com>
Cc:     Yauhen Kharuzhy <jekhor@...il.com>, kbuild-all@...ts.01.org,
        Hans de Goede <hdegoede@...hat.com>,
        linux-kernel@...r.kernel.org
Subject: Re: [pdx86-platform-drivers-x86:review-hans 41/44]
 drivers/platform/x86/lenovo-yogabook-wmi.c:278:20: warning: no previous
 prototype for 'yogabook_wmi_suspend'

On Tue, Dec 07, 2021 at 09:42:46AM +0800, kernel test robot wrote:
> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86.git review-hans
> head:   cb01df9ef827442739051c6457962a5c6bc85d99
> commit: 4709e8b835ec25e8627844e9927804f814b64fd4 [41/44] platform/x86: lenovo-yogabook-wmi: Add driver for Lenovo Yoga Book
> config: x86_64-allyesconfig (https://download.01.org/0day-ci/archive/20211207/202112070945.X05c2wgI-lkp@intel.com/config)
> compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
> reproduce (this is a W=1 build):
>         # https://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86.git/commit/?id=4709e8b835ec25e8627844e9927804f814b64fd4
>         git remote add pdx86-platform-drivers-x86 https://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86.git
>         git fetch --no-tags pdx86-platform-drivers-x86 review-hans
>         git checkout 4709e8b835ec25e8627844e9927804f814b64fd4
>         # save the config file to linux build tree
>         mkdir build_dir
>         make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash drivers/platform/x86/
> 
> 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/platform/x86/lenovo-yogabook-wmi.c:278:20: warning: no previous prototype for 'yogabook_wmi_suspend' [-Wmissing-prototypes]
>      278 | __maybe_unused int yogabook_wmi_suspend(struct device *dev)
>          |                    ^~~~~~~~~~~~~~~~~~~~
> >> drivers/platform/x86/lenovo-yogabook-wmi.c:294:20: warning: no previous prototype for 'yogabook_wmi_resume' [-Wmissing-prototypes]
>      294 | __maybe_unused int yogabook_wmi_resume(struct device *dev)
>          |                    ^~~~~~~~~~~~~~~~~~~

Despite missed static, we usually put __maybe_unused between type and function
name in this cases.

-- 
With Best Regards,
Andy Shevchenko