linux-kernel - Re: [pdx86-platform-drivers-x86:review-hans 59/65] drivers/platform/x86/toshiba_acpi.c:2937:9: warning: no previous prototype for 'toshiba_acpi_hwmon_is

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Date:   Fri, 9 Sep 2022 21:50:59 +0200
From:   Hans de Goede <hdegoede@...hat.com>
To:     Arvid Norlander <lkml@...pal.se>, kernel test robot <lkp@...el.com>
Cc:     kbuild-all@...ts.01.org,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        linux-kernel@...r.kernel.org
Subject: Re: [pdx86-platform-drivers-x86:review-hans 59/65]
 drivers/platform/x86/toshiba_acpi.c:2937:9: warning: no previous prototype
 for 'toshiba_acpi_hwmon_is_visible'

Hi,

On 9/9/22 21:47, Arvid Norlander wrote:
> Hi,
> 
> On 2022-09-09 21:19, kernel test robot wrote:
>> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86.git review-hans
>> head:   79e8f8235a1686d0656b60cf72f7fda5530ee1cf
>> commit: b5f3665e82591d465357f4a69196f46b3d30e997 [59/65] platform/x86: toshiba_acpi: Add fan RPM reading (hwmon interface)
>> config: x86_64-allyesconfig (https://download.01.org/0day-ci/archive/20220910/202209100300.LjCie4bn-lkp@intel.com/config)
>> compiler: gcc-11 (Debian 11.3.0-5) 11.3.0
>> reproduce (this is a W=1 build):
>>         # https://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86.git/commit/?id=b5f3665e82591d465357f4a69196f46b3d30e997
>>         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 b5f3665e82591d465357f4a69196f46b3d30e997
>>         # save the config file
>>         mkdir build_dir && cp config build_dir/.config
>>         make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash drivers/platform/
>>
>> If you fix the issue, kindly add following tag where applicable
>> Reported-by: kernel test robot <lkp@...el.com>
>>
>> All warnings (new ones prefixed by >>):
>>
>>>> drivers/platform/x86/toshiba_acpi.c:2937:9: warning: no previous prototype for 'toshiba_acpi_hwmon_is_visible' [-Wmissing-prototypes]
>>     2937 | umode_t toshiba_acpi_hwmon_is_visible(const void *drvdata,
>>          |         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>>>> drivers/platform/x86/toshiba_acpi.c:2944:5: warning: no previous prototype for 'toshiba_acpi_hwmon_read' [-Wmissing-prototypes]
>>     2944 | int toshiba_acpi_hwmon_read(struct device *dev, enum hwmon_sensor_types type,
>>          |     ^~~~~~~~~~~~~~~~~~~~~~~
>>
>>
>> vim +/toshiba_acpi_hwmon_is_visible +2937 drivers/platform/x86/toshiba_acpi.c
>>
>>   2934	
>>   2935	/* HWMON support for fan */
>>   2936	#if IS_ENABLED(CONFIG_HWMON)
>>> 2937	umode_t toshiba_acpi_hwmon_is_visible(const void *drvdata,
>>   2938					      enum hwmon_sensor_types type,
>>   2939					      u32 attr, int channel)
>>   2940	{
>>   2941		return 0444;
>>   2942	}
>>   2943	
>>> 2944	int toshiba_acpi_hwmon_read(struct device *dev, enum hwmon_sensor_types type,
>>   2945				    u32 attr, int channel, long *val)
> 
> Oops, clearly these are missing "static". Hans de Goede: Can you apply that
> fix locally easily, or should I send a patch? I must have forgotten to
> build with W=1.

I can write a fix for this and squash it into the commits in my review-hans branch,
actually i was just about to do that :)

So you can considered this fixed.

Regards,

hans



> 
>>   2946	{
>>   2947		/*
>>   2948		 * There is only a single channel and single attribute (for the
>>   2949		 * fan) at this point.
>>   2950		 * This can be replaced with more advanced logic in the future,
>>   2951		 * should the need arise.
>>   2952		 */
>>   2953		if (type == hwmon_fan && channel == 0 && attr == hwmon_fan_input) {
>>   2954			u32 value;
>>   2955			int ret;
>>   2956	
>>   2957			ret = get_fan_rpm(toshiba_acpi, &value);
>>   2958			if (ret)
>>   2959				return ret;
>>   2960	
>>   2961			*val = value;
>>   2962			return 0;
>>   2963		}
>>   2964		return -EOPNOTSUPP;
>>   2965	}
>>   2966	
>>
> 
> Best regards,
> Arvid Norlander
>