linux-kernel - Re: [PATCH] drm: refactor call to request

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Message-ID: <CAGXu5j+93SVX4qPgRQrmoKpqyVKsptYVsmQSgZkgvqovnpVE9A@mail.gmail.com>
Date:	Wed, 8 May 2013 08:35:42 -0700
From:	Kees Cook <keescook@...omium.org>
To:	Paul Menzel <paulepanter@...rs.sourceforge.net>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	dri-devel@...ts.freedesktop.org
Subject: Re: [PATCH] drm: refactor call to request_module

On Wed, May 8, 2013 at 12:22 AM, Paul Menzel
<paulepanter@...rs.sourceforge.net> wrote:
> Am Dienstag, den 07.05.2013, 12:32 -0700 schrieb Kees Cook:
>> This reduces the size of the stack frame when calling request_module().
>> Performing the sprintf before the call is not needed.
>
> Good fine. Do you have any hard numbers for the record?
>
> Did you find this just by reading the code or are there any problems
> with stack sizes on some systems?
>
> (This patch would be good alone for decreasing the number of code
> lines. ;-))

No hard numbers; I just saw it while reviewing callers to request_module(). :)

>> Signed-off-by: Kees Cook <keescook@...omium.org>
>> ---
>>  drivers/gpu/drm/drm_encoder_slave.c |    6 +-----
>>  1 file changed, 1 insertion(+), 5 deletions(-)
>
> Acked-by: Paul Menzel <paulepanter@...rs.sourceforge.net>

Thanks!

-Kees

--
Kees Cook
Chrome OS Security
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