From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756168AbbCCK3k (ORCPT ); Tue, 3 Mar 2015 05:29:40 -0500 Received: from smtprelay0093.hostedemail.com ([216.40.44.93]:33203 "EHLO smtprelay.hostedemail.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1754832AbbCCK3h (ORCPT ); Tue, 3 Mar 2015 05:29:37 -0500 X-Session-Marker: 6A6F6540706572636865732E636F6D X-Spam-Summary: 2,0,0,,d41d8cd98f00b204,joe@perches.com,:::::::::,RULES_HIT:41:355:379:541:599:960:988:989:1260:1277:1311:1313:1314:1345:1359:1373:1437:1515:1516:1518:1534:1541:1593:1594:1711:1730:1747:1777:1792:2194:2199:2393:2559:2562:2828:3138:3139:3140:3141:3142:3352:3622:3865:3866:3868:3871:3872:3873:3874:4321:5007:6119:6261:7903:10004:10400:10481:10848:11026:11232:11658:11914:12296:12517:12519:12740:13069:13311:13357:14096:14097:19900:21080,0,RBL:none,CacheIP:none,Bayesian:0.5,0.5,0.5,Netcheck:none,DomainCache:0,MSF:not bulk,SPF:fn,MSBL:0,DNSBL:none,Custom_rules:0:0:0 X-HE-Tag: tramp28_53a758dd01c44 X-Filterd-Recvd-Size: 2209 Message-ID: <1425378573.17273.9.camel@perches.com> Subject: Re: [PATCH net-next 13/14] wireless: Use eth__addr instead of memset From: Joe Perches To: Johannes Berg Cc: netdev@vger.kernel.org, "David S. Miller" , linux-wireless@vger.kernel.org, linux-kernel@vger.kernel.org Date: Tue, 03 Mar 2015 02:29:33 -0800 In-Reply-To: <1425373219.2450.13.camel@sipsolutions.net> References: <0c710456e4875ff00c1a9fcff9378ed15110dcd3.1425354528.git.joe@perches.com> <1425370617.2450.3.camel@sipsolutions.net> <1425371858.17273.3.camel@perches.com> <1425372295.2450.9.camel@sipsolutions.net> <1425372748.17273.6.camel@perches.com> <1425373219.2450.13.camel@sipsolutions.net> Content-Type: text/plain; charset="ISO-8859-1" X-Mailer: Evolution 3.12.10-0ubuntu1~14.10.1 Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, 2015-03-03 at 10:00 +0100, Johannes Berg wrote: > On Tue, 2015-03-03 at 00:52 -0800, Joe Perches wrote: > > > > > My guess is the eth_zero_addr and eth_broadcast functions > > > > are always taking aligned(2) arguments, just like all the > > > > is__ether_addr functions. > > > > > > Err, are you serious??? > > > > Yes. > > > > > That *clearly* isn't true, and if it was then > > > this patch wouldn't be safe at all. > > > > And why is that? > > > > Until patch 1 of this series, eth_zero_addr and > > eth_broadcast_addr was just an inline for a memset. > > > > Even after patch 1, it's effectively still memset. > > Exactly. It therefore *doesn't* require an aligned(2) argument, unlike > what you stated above, hence my question if you're serious (and perhaps > looking at some other code that I don't have). Nope, you simply misunderstood what I did write. What I said was that the arguments were likely already aligned(2), not that the alignment was a requirement.