linux-kernel - Re: [PATCH 1/2 v4] Driver for Freescale 8610 and 5121 DIU

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Message-ID: <47ED3441.3090601@freescale.com>
Date:	Fri, 28 Mar 2008 13:09:05 -0500
From:	Scott Wood <scottwood@...escale.com>
To:	Timur Tabi <timur@...escale.com>
CC:	York Sun <yorksun@...escale.com>,
	linux-fbdev-devel@...ts.sourceforge.net, akpm@...ux-foundation.org,
	linux-kernel@...r.kernel.org, linuxppc-dev@...abs.org,
	galak@...nel.crashing.org, a.p.zijlstra@...llo.nl
Subject: Re: [PATCH 1/2 v4] Driver for Freescale 8610 and 5121 DIU

Timur Tabi wrote:
> Scott Wood wrote:
> 
>> ...but not anywhere else.  All user pointers should have a __user 
>> annotation.
> 
> Even in a typecast?

Yes.  Otherwise, as far as sparse sees, you're passing a kernel pointer 
to something expecting a user pointer.

-Scott
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