linux-kernel - Re: [PATCH] mm/mmap.c: optimization of do_mmap

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Date:	Mon, 08 Jun 2015 11:42:46 -0400
From:	Rik van Riel <riel@...hat.com>
To:	Piotr Kwapulinski <kwapulinski.piotr@...il.com>,
	akpm@...ux-foundation.org
CC:	kirill.shutemov@...ux.intel.com, mhocko@...e.cz,
	sasha.levin@...cle.com, dave@...olabs.net, koct9i@...il.com,
	pfeiner@...gle.com, dh.herrmann@...il.com, vishnu.ps@...sung.com,
	linux-mm@...ck.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] mm/mmap.c: optimization of do_mmap_pgoff function

On 06/06/2015 05:54 AM, Piotr Kwapulinski wrote:
> The simple check for zero length memory mapping may be performed
> earlier. It causes that in case of zero length memory mapping some
> unnecessary code is not executed at all. It does not make the code less
> readable and saves some CPU cycles.
> 
> Signed-off-by: Piotr Kwapulinski <kwapulinski.piotr@...il.com>

Acked-by: Rik van Riel <riel@...hat.com>

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