linux-kernel - Re: [PATCH 1/2] [media] ad5820: use __maybe

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Date:   Mon, 12 Sep 2016 19:52:08 +0200
From:   Pavel Machek <pavel@....cz>
To:     Arnd Bergmann <arnd@...db.de>
Cc:     Mauro Carvalho Chehab <mchehab@...nel.org>,
        Sakari Ailus <sakari.ailus@...ux.intel.com>,
        Pali Rohár <pali.rohar@...il.com>,
        linux-media@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] [media] ad5820: use __maybe_unused for PM functions

On Mon 2016-09-12 17:32:57, Arnd Bergmann wrote:
> The new ad5820 driver uses #ifdef to hide the suspend/resume functions,
> but gets it wrong when CONFIG_PM_SLEEP is disabled:
> 
> drivers/media/i2c/ad5820.c:286:12: error: 'ad5820_resume' defined but not used [-Werror=unused-function]
> drivers/media/i2c/ad5820.c:274:12: error: 'ad5820_suspend' defined but not used [-Werror=unused-function]
> 
> This replaces the #ifdef with a __maybe_unused annotation that is
> simpler and harder to get wrong, avoiding the warning.
> 
> Signed-off-by: Arnd Bergmann <arnd@...db.de>
> Fixes: bee3d5115611 ("[media] ad5820: Add driver for auto-focus
coil")

Thanks!

Acked-by: Pavel Machek <pavel@....cz>


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