linux-kernel - Re: [PATCH -next] media: marvell-ccic: Fix -Wunused-function warnings

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Date:   Thu, 10 Sep 2020 17:18:15 +0800
From:   Yuehaibing <yuehaibing@...wei.com>
To:     Lubomir Rintel <lkundrak@...sk>
CC:     <corbet@....net>, <mchehab@...nel.org>, <hverkuil-cisco@...all.nl>,
        <linux-media@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH -next] media: marvell-ccic: Fix -Wunused-function warnings

On 2020/9/10 16:22, Lubomir Rintel wrote:
> On Thu, Sep 10, 2020 at 04:09:33PM +0800, YueHaibing wrote:
>> If CONFIG_PM is n, gcc warns:
>>
>> drivers/media/platform/marvell-ccic/mmp-driver.c:347:12: warning: ‘mmpcam_resume’ defined but not used [-Wunused-function]
>>  static int mmpcam_resume(struct device *dev)
>>             ^~~~~~~~~~~~~
>> drivers/media/platform/marvell-ccic/mmp-driver.c:338:12: warning: ‘mmpcam_suspend’ defined but not used [-Wunused-function]
>>  static int mmpcam_suspend(struct device *dev)
>>             ^~~~~~~~~~~~~~
>> drivers/media/platform/marvell-ccic/mmp-driver.c:324:12: warning: ‘mmpcam_runtime_suspend’ defined but not used [-Wunused-function]
>>  static int mmpcam_runtime_suspend(struct device *dev)
>>             ^~~~~~~~~~~~~~~~~~~~~~
>> drivers/media/platform/marvell-ccic/mmp-driver.c:310:12: warning: ‘mmpcam_runtime_resume’ defined but not used [-Wunused-function]
>>  static int mmpcam_runtime_resume(struct device *dev)
>>             ^~~~~~~~~~~~~~~~~~~~~
>>
>> Mark them as __maybe_unused to fix this.
>>
>> Reported-by: Hulk Robot <hulkci@...wei.com>
>> Signed-off-by: YueHaibing <yuehaibing@...wei.com>
> 
> Your colleague seems to sent out an equivalent patch:
> https://lore.kernel.org/lkml/20200910080933.40684-1-yuehaibing@huawei.com/

This is my patch, paste an wrong link?

> 
> Cheers
> Lubo
> 
>> ---
>>  drivers/media/platform/marvell-ccic/mmp-driver.c | 8 ++++----
>>  1 file changed, 4 insertions(+), 4 deletions(-)
>>
>> diff --git a/drivers/media/platform/marvell-ccic/mmp-driver.c b/drivers/media/platform/marvell-ccic/mmp-driver.c
>> index c4b28a00a3a2..032fdddbbecc 100644
>> --- a/drivers/media/platform/marvell-ccic/mmp-driver.c
>> +++ b/drivers/media/platform/marvell-ccic/mmp-driver.c
>> @@ -307,7 +307,7 @@ static int mmpcam_platform_remove(struct platform_device *pdev)
>>   * Suspend/resume support.
>>   */
>>  
>> -static int mmpcam_runtime_resume(struct device *dev)
>> +static int __maybe_unused mmpcam_runtime_resume(struct device *dev)
>>  {
>>  	struct mmp_camera *cam = dev_get_drvdata(dev);
>>  	struct mcam_camera *mcam = &cam->mcam;
>> @@ -321,7 +321,7 @@ static int mmpcam_runtime_resume(struct device *dev)
>>  	return 0;
>>  }
>>  
>> -static int mmpcam_runtime_suspend(struct device *dev)
>> +static int __maybe_unused mmpcam_runtime_suspend(struct device *dev)
>>  {
>>  	struct mmp_camera *cam = dev_get_drvdata(dev);
>>  	struct mcam_camera *mcam = &cam->mcam;
>> @@ -335,7 +335,7 @@ static int mmpcam_runtime_suspend(struct device *dev)
>>  	return 0;
>>  }
>>  
>> -static int mmpcam_suspend(struct device *dev)
>> +static int __maybe_unused mmpcam_suspend(struct device *dev)
>>  {
>>  	struct mmp_camera *cam = dev_get_drvdata(dev);
>>  
>> @@ -344,7 +344,7 @@ static int mmpcam_suspend(struct device *dev)
>>  	return 0;
>>  }
>>  
>> -static int mmpcam_resume(struct device *dev)
>> +static int __maybe_unused mmpcam_resume(struct device *dev)
>>  {
>>  	struct mmp_camera *cam = dev_get_drvdata(dev);
>>  
>> -- 
>> 2.17.1
>>
>>
> 
> .
>