From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757344Ab0CLJeT (ORCPT ); Fri, 12 Mar 2010 04:34:19 -0500 Received: from mx1.redhat.com ([209.132.183.28]:37812 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757350Ab0CLJeP (ORCPT ); Fri, 12 Mar 2010 04:34:15 -0500 Message-ID: <4B9A0A66.2000108@redhat.com> Date: Fri, 12 Mar 2010 11:33:26 +0200 From: Avi Kivity User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.1.8) Gecko/20100301 Fedora/3.0.3-1.fc12 Thunderbird/3.0.3 MIME-Version: 1.0 To: David Miller 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 References: <4B99FD4D.4090206@redhat.com> <20100312.004202.27822414.davem@davemloft.net> <4B99FF0A.1030700@redhat.com> <20100312.005051.09912332.davem@davemloft.net> In-Reply-To: <20100312.005051.09912332.davem@davemloft.net> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 03/12/2010 10:50 AM, David Miller wrote: > From: Avi Kivity > Date: Fri, 12 Mar 2010 10:44:58 +0200 > > >> Strange, that people can install a new kernel, but not a new >> assembler. >> > Someone shouldn't have to upgrade their tools to build the > kernel. > The kernel would still build, just without the AES-NI CTR optimization (or kvm). > And we work very hard to make sure this is the case except > in the most unavoidable situations. > Why so hard? It has a cost. The user can certainly 'make AS=~/new-binutils/bin/gas' and it wouldn't even affect the rest of their system. tools/as/ anyone? -- Do not meddle in the internals of kernels, for they are subtle and quick to panic.