From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753048AbaEOAiD (ORCPT ); Wed, 14 May 2014 20:38:03 -0400 Received: from terminus.zytor.com ([198.137.202.10]:34791 "EHLO mail.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751559AbaEOAiB (ORCPT ); Wed, 14 May 2014 20:38:01 -0400 Message-ID: <53740C42.3000906@zytor.com> Date: Wed, 14 May 2014 17:37:22 -0700 From: "H. Peter Anvin" User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.5.0 MIME-Version: 1.0 To: George Spelvin , pavel@ucw.cz CC: arik@wizery.com, david.gnedt@davizone.at, eliad@wizery.com, jan.nikitenko@gmail.com, laurent.pinchart+renesas@ideasonboard.com, linux-kernel@vger.kernel.org, linux-mmc@vger.kernel.org, linux-spi@vger.kernel.org, linux-wireless@vger.kernel.org, linville@tuxdriver.com, luca@coelho.fi, tony@atomide.com Subject: Re: [PATCH v2 1/3] lib/crc7: Shift crc7() output left 1 bit References: <20140511100211.1334.qmail@ns.horizon.com> In-Reply-To: <20140511100211.1334.qmail@ns.horizon.com> X-Enigmail-Version: 1.6 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 05/11/2014 03:02 AM, George Spelvin wrote: > From 770aa22e6c9c92027e3e21797192ccabb3e7c70e Mon Sep 17 00:00:00 2001 > From: George Spelvin > Date: Sat, 10 May 2014 10:32:57 -0400 > Subject: [PATCH v2 1/3] lib/crc7: Shift crc7() output left 1 bit > > This eliminates a 1-bit left shift in every single caller, > and makes the inner loop of the CRC computation more efficient. > > Renamed crc7 to crc7_be (big-endian) since the interface changed. > > Also purged #include from files that don't use it at all. > > Signed-off-by: George Spelvin If the whole point of this is to use it for MMC/SD cards, why not just also subsume the OR 1 and call it crc7_mmc() or something like that. (Which I'm all for doing... I don't know of any other crc7 users.) -hpa