Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751663AbdGZBOz (ORCPT ); Tue, 25 Jul 2017 21:14:55 -0400 Received: from bh-25.webhostbox.net ([208.91.199.152]:59561 "EHLO bh-25.webhostbox.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751611AbdGZBOx (ORCPT ); Tue, 25 Jul 2017 21:14:53 -0400 Date: Tue, 25 Jul 2017 18:14:51 -0700 From: Guenter Roeck To: Martin Schwidefsky Cc: linux-kernel@vger.kernel.org, Heiko Carstens , linux-s390@vger.kernel.org Subject: Qemu problems in -next with 's390/spinlock: add niai spinlock hints' Message-ID: <20170726011451.GA24947@roeck-us.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.5.24 (2015-08-30) X-Authenticated_sender: guenter@roeck-us.net X-OutGoing-Spam-Status: No, score=-1.0 X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - bh-25.webhostbox.net X-AntiAbuse: Original Domain - vger.kernel.org X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - roeck-us.net X-Get-Message-Sender-Via: bh-25.webhostbox.net: authenticated_id: guenter@roeck-us.net X-Authenticated-Sender: bh-25.webhostbox.net: guenter@roeck-us.net X-Source: X-Source-Args: X-Source-Dir: Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 447 Lines: 12 Hi Martin, my s390 qemu tests in linux-next stopped working a few days ago. Bisect points to commit 's390/spinlock: add niai spinlock hints'. Looking at the patch, this isn't really surprising; at least to me it looks like the patch is making instructions mandatory which are only available in Z14 CPUs. Does this mean that older s390 CPUs (such as the Z900 used in my qemu tests) are no longer going to be supported in Linux ? Thanks, Guenter