Re: [PATCH -next] i2c: designware: Mark dw_i2c_plat_{suspend,resume}() as __maybe_unused

From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
To: Nathan Chancellor <nathan@kernel.org>
Cc: Wolfram Sang <wsa@kernel.org>,
	Jarkko Nikula <jarkko.nikula@linux.intel.com>,
	Mika Westerberg <mika.westerberg@linux.intel.com>,
	Jan Dabros <jsd@semihalf.com>,
	Hans de Goede <hdegoede@redhat.com>,
	linux-i2c@vger.kernel.org, patches@lists.linux.dev
Subject: Re: [PATCH -next] i2c: designware: Mark dw_i2c_plat_{suspend,resume}() as __maybe_unused
Date: Fri, 4 Mar 2022 14:39:06 +0200	[thread overview]
Message-ID: <YiIIanhJXnoDWJkq@smile.fi.intel.com> (raw)
In-Reply-To: <20220303191713.2402461-1-nathan@kernel.org>

On Thu, Mar 03, 2022 at 12:17:13PM -0700, Nathan Chancellor wrote:
> When CONFIG_PM is set but CONFIG_PM_SLEEP is not, two compiler warnings
> appear:
> 
>   drivers/i2c/busses/i2c-designware-platdrv.c:444:12: error: unused function 'dw_i2c_plat_suspend' [-Werror,-Wunused-function]
>   static int dw_i2c_plat_suspend(struct device *dev)
>              ^
>   drivers/i2c/busses/i2c-designware-platdrv.c:465:12: error: unused function 'dw_i2c_plat_resume' [-Werror,-Wunused-function]
>   static int dw_i2c_plat_resume(struct device *dev)
>              ^
>   2 errors generated.
> 
> These functions are only used in SET_LATE_SYSTEM_SLEEP_PM_OPS(), which
> is defined as empty when CONFIG_PM_SLEEP is not defined. Mark the
> functions as __maybe_unused to make it clear that these functions might
> be unused in this configuration.

Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Thanks!

> Fixes: c57813b8b288 ("i2c: designware: Lock the adapter while setting the suspended flag")
> Signed-off-by: Nathan Chancellor <nathan@kernel.org>
> ---
>  drivers/i2c/busses/i2c-designware-platdrv.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/i2c/busses/i2c-designware-platdrv.c b/drivers/i2c/busses/i2c-designware-platdrv.c
> index 116a297d1f6b..70ade5306e45 100644
> --- a/drivers/i2c/busses/i2c-designware-platdrv.c
> +++ b/drivers/i2c/busses/i2c-designware-platdrv.c
> @@ -441,7 +441,7 @@ static int dw_i2c_plat_runtime_suspend(struct device *dev)
>  	return 0;
>  }
>  
> -static int dw_i2c_plat_suspend(struct device *dev)
> +static int __maybe_unused dw_i2c_plat_suspend(struct device *dev)
>  {
>  	struct dw_i2c_dev *i_dev = dev_get_drvdata(dev);
>  
> @@ -462,7 +462,7 @@ static int dw_i2c_plat_runtime_resume(struct device *dev)
>  	return 0;
>  }
>  
> -static int dw_i2c_plat_resume(struct device *dev)
> +static int __maybe_unused dw_i2c_plat_resume(struct device *dev)
>  {
>  	struct dw_i2c_dev *i_dev = dev_get_drvdata(dev);
>  
> 
> base-commit: 1d366c2f9df8279df2adbb60471f86fc40a1c39e
> -- 
> 2.35.1
> 

-- 
With Best Regards,
Andy Shevchenko