From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752574AbbFHPm7 (ORCPT ); Mon, 8 Jun 2015 11:42:59 -0400 Received: from mx1.redhat.com ([209.132.183.28]:38996 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752228AbbFHPmy (ORCPT ); Mon, 8 Jun 2015 11:42:54 -0400 Message-ID: <5575B7F6.6090000@redhat.com> Date: Mon, 08 Jun 2015 11:42:46 -0400 From: Rik van Riel User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.4.0 MIME-Version: 1.0 To: Piotr Kwapulinski , akpm@linux-foundation.org CC: kirill.shutemov@linux.intel.com, mhocko@suse.cz, sasha.levin@oracle.com, dave@stgolabs.net, koct9i@gmail.com, pfeiner@google.com, dh.herrmann@gmail.com, vishnu.ps@samsung.com, linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH] mm/mmap.c: optimization of do_mmap_pgoff function References: <1433584472-19151-1-git-send-email-kwapulinski.piotr@gmail.com> In-Reply-To: <1433584472-19151-1-git-send-email-kwapulinski.piotr@gmail.com> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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 Acked-by: Rik van Riel -- All rights reversed