linux-kernel - Re: randconfig build error with next-20150620, in drivers/media/v4l2-core/videobuf2-core.c

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Date:	Wed, 01 Jul 2015 11:07:08 -0700
From:	Randy Dunlap <rdunlap@...radead.org>
To:	Jim Davis <jim.epost@...il.com>,
	Stephen Rothwell <sfr@...b.auug.org.au>,
	linux-next <linux-next@...r.kernel.org>,
	linux-kernel <linux-kernel@...r.kernel.org>, pawel@...iak.com,
	Marek Szyprowski <m.szyprowski@...sung.com>,
	Kyungmin Park <kyungmin.park@...sung.com>,
	mchehab@....samsung.com, linux-media <linux-media@...r.kernel.org>
Subject: Re: randconfig build error with next-20150620, in drivers/media/v4l2-core/videobuf2-core.c

On 06/20/15 09:44, Jim Davis wrote:
> Building with the attached random configuration file,
> 
> drivers/media/v4l2-core/videobuf2-core.c: In function ‘vb2_warn_zero_bytesused’:
> drivers/media/v4l2-core/videobuf2-core.c:1253:2: error: implicit declaration of
> function ‘__WARN’ [-Werror=implicit-function-declaration]
>   __WARN();
>   ^
> 

When CONFIG_BUG is not enabled, there is no definition of __WARN().

Should be add an empty stub for __WARN() or just change the only
user (caller) of it to do something different?

-- 
~Randy
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