From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755839AbbHQQ6m (ORCPT ); Mon, 17 Aug 2015 12:58:42 -0400 Received: from terminus.zytor.com ([198.137.202.10]:51541 "EHLO mail.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753651AbbHQQ6k (ORCPT ); Mon, 17 Aug 2015 12:58:40 -0400 User-Agent: K-9 Mail for Android In-Reply-To: References: <20150814071500.GA2678@gmail.com> <20150817080143.GA16928@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset=UTF-8 Subject: Re: [GIT PULL] x86 fixes From: "H. Peter Anvin" Date: Mon, 17 Aug 2015 09:58:10 -0700 To: Linus Torvalds , Ingo Molnar CC: Juergen Gross , Andy Lutomirski , Linux Kernel Mailing List , Thomas Gleixner , Peter Zijlstra , Brian Gerst , Denys Vlasenko , Andrew Morton Message-ID: Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org That is not true. It *does* work, and I have tested it fairly recently. On August 17, 2015 9:47:01 AM PDT, Linus Torvalds wrote: >On Mon, Aug 17, 2015 at 1:01 AM, Ingo Molnar wrote: >> >> Any objections against removing all of math-emu in v4.3? This would >simplify the >> FPU code in various places beyond math-emu/. > >Hmm. I guess we could just try. The fact that you argue that the FP >emulation likely hasn't worked for a few years is a pretty powerful >argument that nobody has cared. And if somebody does, and ends up >having a use case and willing to test, we can always re-animate the >zombie that is math emu support. > >Considering that we don't support the old i386 any more, the only chip >I know of that needs it is the i486sx. However, there are probably >several clone chips that did the "we're a 486" thing by adding the few >integer instructions but not doing a FPU. And there might well be >various embedded versions of the 486 that might even be in use still. >But afaik most distributions have required Pentium of P6-level >capabilities for some time, and I guess any existing old systems >aren't going to upgrade their kernels anyway. > > Linus -- Sent from my Android device with K-9 Mail. Please excuse my brevity.