From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.3 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS, URIBL_BLOCKED,USER_AGENT_MUTT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0DDC9C282C4 for ; Mon, 4 Feb 2019 16:59:11 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id CA85420815 for ; Mon, 4 Feb 2019 16:59:10 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=lunn.ch header.i=@lunn.ch header.b="ralV0nb1" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728770AbfBDQ7J (ORCPT ); Mon, 4 Feb 2019 11:59:09 -0500 Received: from vps0.lunn.ch ([185.16.172.187]:38222 "EHLO vps0.lunn.ch" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727057AbfBDQ7I (ORCPT ); Mon, 4 Feb 2019 11:59:08 -0500 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lunn.ch; s=20171124; h=In-Reply-To:Content-Type:MIME-Version:References:Message-ID: Subject:Cc:To:From:Date:Sender:Reply-To:Content-Transfer-Encoding:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Id:List-Help:List-Unsubscribe:List-Subscribe: List-Post:List-Owner:List-Archive; bh=9N8TY0i2V+YP6xT0Vhw/uRnuKOAYll8O9RuzmZTyAs8=; b=ralV0nb1Iu5VbjbaTBc15q0Tyr RRuvhzv6RuVDmU12JCsWURbnSsBHEuhCoiRBwr9jvLEDP1VVdsvsNvbjTePl+avIoB3092bnQnmpi dXhvvnKyJKYcS6A8OIqTkdPqr8iGukfY5YaQYMaVQve8d9OUBZKYCMkbSuHlDpEjtRyM=; Received: from andrew by vps0.lunn.ch with local (Exim 4.89) (envelope-from ) id 1gqhaI-0007Ma-KS; Mon, 04 Feb 2019 17:59:02 +0100 Date: Mon, 4 Feb 2019 17:59:02 +0100 From: Andrew Lunn To: Thierry Reding Cc: "David S. Miller" , Heiner Kallweit , Realtek linux nic maintainers , netdev@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v2 2/2] r8169: Avoid pointer aliasing Message-ID: <20190204165902.GB24989@lunn.ch> References: <20190204164213.30727-1-thierry.reding@gmail.com> <20190204164213.30727-2-thierry.reding@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20190204164213.30727-2-thierry.reding@gmail.com> User-Agent: Mutt/1.5.23 (2014-03-12) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Feb 04, 2019 at 05:42:13PM +0100, Thierry Reding wrote: > From: Thierry Reding > > Read MAC address 32-bit at a time and manually extract the individual > bytes. This avoids pointer aliasing and gives the compiler a better > chance of optimizing the operation. > > Suggested-by: Andrew Lunn > Signed-off-by: Thierry Reding Reviewed-by: Andrew Lunn Andrew