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=-12.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable 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 59EA0C4363D for ; Wed, 7 Oct 2020 10:17:11 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id EB6BA20782 for ; Wed, 7 Oct 2020 10:17:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727878AbgJGKRK (ORCPT ); Wed, 7 Oct 2020 06:17:10 -0400 Received: from mx2.suse.de ([195.135.220.15]:41302 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727014AbgJGKRJ (ORCPT ); Wed, 7 Oct 2020 06:17:09 -0400 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.221.27]) by mx2.suse.de (Postfix) with ESMTP id BD004AAC6; Wed, 7 Oct 2020 10:17:07 +0000 (UTC) From: Thomas Bogendoerfer To: linux-mips@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH] MIPS: SGI-IP28: disable use of ll/sc in kernel Date: Wed, 7 Oct 2020 12:17:04 +0200 Message-Id: <20201007101704.110101-1-tsbogend@alpha.franken.de> X-Mailer: git-send-email 2.16.4 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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(-) diff --git a/arch/mips/include/asm/mach-ip28/cpu-feature-overrides.h b/arch/mips/include/asm/mach-ip28/cpu-feature-overrides.h index ba8b4e30b3e2..613bbc10c1f2 100644 --- a/arch/mips/include/asm/mach-ip28/cpu-feature-overrides.h +++ b/arch/mips/include/asm/mach-ip28/cpu-feature-overrides.h @@ -25,7 +25,7 @@ #define cpu_has_mcheck 0 #define cpu_has_ejtag 0 -#define cpu_has_llsc 1 +#define cpu_has_llsc 0 #define cpu_has_vtag_icache 0 #define cpu_has_dc_aliases 0 /* see probe_pcache() */ #define cpu_has_ic_fills_f_dc 0 -- 2.16.4