From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756615Ab0CLIlo (ORCPT ); Fri, 12 Mar 2010 03:41:44 -0500 Received: from 74-93-104-97-Washington.hfc.comcastbusiness.net ([74.93.104.97]:42201 "EHLO sunset.davemloft.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756568Ab0CLIll (ORCPT ); Fri, 12 Mar 2010 03:41:41 -0500 Date: Fri, 12 Mar 2010 00:42:02 -0800 (PST) Message-Id: <20100312.004202.27822414.davem@davemloft.net> To: avi@redhat.com Cc: ying.huang@intel.com, akpm@linux-foundation.org, herbert@gondor.apana.org.au, linux-kernel@vger.kernel.org, linux-crypto@vger.kernel.org Subject: Re: [BUGFIX] Fix AES-NI CTR optimization compiling failure with gas 2.16.1 From: David Miller In-Reply-To: <4B99FD4D.4090206@redhat.com> References: <1268377307.1640.491.camel@yhuang-dev.sh.intel.com> <4B99FD4D.4090206@redhat.com> X-Mailer: Mew version 6.3 on Emacs 23.1 / Mule 6.0 (HANACHIRUSATO) Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Avi Kivity Date: Fri, 12 Mar 2010 10:37:33 +0200 > Eventually you'll port the entire assembler into macros, as > instructions are introduced more frequently that people upgrade their > assemblers. Maybe we should disable the new features and warn people > (and distros) to upgrade their tools instead. I totally and completely disagree. It would have taken more than a year to get Niagara cpu support out to people if I had done what you are suggesting. And here we're talking about one instruction in one specialized case in a very piece of crypto module assembler.