linux-kernel - Re: [PATCH] drm/i915: clarify reasoning for the access

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Date:	Mon, 11 Mar 2013 20:51:25 +0000
From:	Chris Wilson <chris@...is-wilson.co.uk>
To:	Kees Cook <keescook@...omium.org>
Cc:	linux-kernel@...r.kernel.org,
	Daniel Vetter <daniel.vetter@...ll.ch>,
	David Airlie <airlied@...ux.ie>,
	dri-devel@...ts.freedesktop.org
Subject: Re: [PATCH] drm/i915: clarify reasoning for the access_ok call

On Mon, Mar 11, 2013 at 12:26:30PM -0700, Kees Cook wrote:
> This clarifies the comment above the access_ok check so a missing
> VERIFY_READ doesn't alarm anyone.

Do we really need to copy the interface documentation?

/**
 * access_ok: - Checks if a user space pointer is valid
 * @type: Type of access: %VERIFY_READ or %VERIFY_WRITE.  Note that
 *        %VERIFY_WRITE is a superset of %VERIFY_READ - if it is safe
 *        to write to a block, it is always safe to read from it.
 * @addr: User space pointer to start of block to check
 * @size: Size of block to check
 */
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre
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