From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S946158AbXHMOD2 (ORCPT ); Mon, 13 Aug 2007 10:03:28 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S939916AbXHMKzu (ORCPT ); Mon, 13 Aug 2007 06:55:50 -0400 Received: from web7606.mail.in.yahoo.com ([202.86.4.25]:31220 "HELO web7606.mail.in.yahoo.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S1762882AbXHMKzs (ORCPT ); Mon, 13 Aug 2007 06:55:48 -0400 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=s1024; d=yahoo.co.in; h=X-YMail-OSG:Received:Date:From:Subject:To:MIME-Version:Content-Type:Content-Transfer-Encoding:Message-ID; b=I0MPyVZ5FRW8jtQ2wCsDD/UNY5wnGwBh6D/LqIAfACTkS7bEWhBPYa82WFpzkp1Dw5zy656HA+63bmHvku5sKUieRLYvFj1RkRrFOLGgkYLYICLByQCuwKOmMWGnlKOhtZQH+1gErJ7bIDKPl9nfeo6A6xmU6zrLunKJNB8cLvc=; X-YMail-OSG: WQavnJoVM1mGnKplKpiqxXmGPVdl.VkdD8EIGRr64M3e5gcDEw84F3uNAX7ZJbtXb0eIgJl6H8NNgzC3_Zp2PLahYLwpQoPU0qRHX8U_77qSugCG4to- Date: Mon, 13 Aug 2007 11:55:40 +0100 (BST) From: sk malik Subject: why use memcpy when memmove is there? To: linux-kernel@vger.kernel.org MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7BIT Message-ID: <977159.24669.qm@web7606.mail.in.yahoo.com> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Hi, All We were looking at "[kernel]/lib/string.c" (http://lxr.linux.no/source/lib/string.c#L500) memcpy copies a part of memory to some other location but It will not work for all cases of overlapping blocks.(if the start of destination block falls between the source block) while memove copes with overlapping areas. then why is memcpy present in the sources can't we simply do "#define memcpy memmove" in include/linux/string.h or am I missing something? Regards Sri Unlimited freedom, unlimited storage. Get it now, on http://help.yahoo.com/l/in/yahoo/mail/yahoomail/tools/tools-08.html/