linux-kernel - Re: [PATCH] media: v4l: use WARN_ON(1) instead of _

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Message-ID: <20170726112447.GD6033@amd>
Date:   Wed, 26 Jul 2017 13:24:47 +0200
From:   Pavel Machek <pavel@....cz>
To:     Arnd Bergmann <arnd@...db.de>
Cc:     Mauro Carvalho Chehab <mchehab@...nel.org>,
        Guennadi Liakhovetski <g.liakhovetski@....de>,
        Sakari Ailus <sakari.ailus@....fi>,
        Hans Verkuil <hans.verkuil@...co.com>,
        Robert Jarzmik <robert.jarzmik@...e.fr>,
        Petr Cvek <petr.cvek@....cz>,
        Sebastian Reichel <sre@...nel.org>,
        linux-media@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] media: v4l: use WARN_ON(1) instead of __WARN()

On Tue 2017-07-25 17:39:14, Arnd Bergmann wrote:
> __WARN() cannot be used in portable code, since it is only
> available on some architectures and configurations:
> 
> drivers/media/platform/pxa_camera.c: In function 'pxa_mbus_config_compatible':
> drivers/media/platform/pxa_camera.c:642:3: error: implicit declaration of function '__WARN'; did you mean '__WALL'? [-Werror=implicit-function-declaration]
> 
> The common way to express an unconditional warning is WARN_ON(1),
> so let's use that here.
> 
> Fixes: 97bbdf02d905 ("media: v4l: Add support for CSI-1 and CCP2 busses")
> Signed-off-by: Arnd Bergmann <arnd@...db.de>

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

-- 
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