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=-8.2 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 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 BC7ABC433E7 for ; Thu, 8 Oct 2020 09:19:41 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 62B5E2177B for ; Thu, 8 Oct 2020 09:19:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728964AbgJHJTk (ORCPT ); Thu, 8 Oct 2020 05:19:40 -0400 Received: from elvis.franken.de ([193.175.24.41]:51447 "EHLO elvis.franken.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726176AbgJHJTk (ORCPT ); Thu, 8 Oct 2020 05:19:40 -0400 Received: from uucp (helo=alpha) by elvis.franken.de with local-bsmtp (Exim 3.36 #1) id 1kQS5J-0004K4-01; Thu, 08 Oct 2020 11:19:37 +0200 Received: by alpha.franken.de (Postfix, from userid 1000) id 43AF2C1121; Thu, 8 Oct 2020 11:19:25 +0200 (CEST) Date: Thu, 8 Oct 2020 11:19:25 +0200 From: Thomas Bogendoerfer To: linux-mips@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH] MIPS: SGI-IP28: disable use of ll/sc in kernel Message-ID: <20201008091925.GB6481@alpha.franken.de> References: <20201007101704.110101-1-tsbogend@alpha.franken.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20201007101704.110101-1-tsbogend@alpha.franken.de> User-Agent: Mutt/1.5.23 (2014-03-12) Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Oct 07, 2020 at 12:17:04PM +0200, Thomas Bogendoerfer wrote: > SGI-IP28 systems only use broken R10k rev 2.5 CPUs, which could lock > up, if ll/sc sequences are issued in certain order. Since those systems > are all non-SMP, we can disable ll/sc usage in kernel. > > Signed-off-by: Thomas Bogendoerfer > --- > arch/mips/include/asm/mach-ip28/cpu-feature-overrides.h | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) applied to mips-next. Thomas. -- Crap can work. Given enough thrust pigs will fly, but it's not necessarily a good idea. [ RFC1925, 2.3 ]