Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756887AbcKDCH1 (ORCPT ); Thu, 3 Nov 2016 22:07:27 -0400 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:37379 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756016AbcKDCHZ (ORCPT ); Thu, 3 Nov 2016 22:07:25 -0400 Subject: Re: [PATCH 1/3] powerpc: Emulation support for load/store instructions on LE To: Ravi Bangoria , Michael Ellerman References: <1478076783-2872-1-git-send-email-ravi.bangoria@linux.vnet.ibm.com> <1478076783-2872-2-git-send-email-ravi.bangoria@linux.vnet.ibm.com> <20161103080412.68240cda@kryten> <581ACDF2.1010409@linux.vnet.ibm.com> <8737j8opwb.fsf@concordia.ellerman.id.au> <581B110F.9050805@linux.vnet.ibm.com> Cc: chris@distroguy.com, aneesh.kumar@linux.vnet.ibm.com, ast@kernel.org, linux-kernel@vger.kernel.org, oss@buserror.net, paul.gortmaker@windriver.com, duwe@lst.de, Anton Blanchard , lsorense@csclub.uwaterloo.ca, bauerman@linux.vnet.ibm.com, oohall@gmail.com, naveen.n.rao@linux.vnet.ibm.com, linuxppc-dev@lists.ozlabs.org, paulus@samba.org, viro@zeniv.linux.org.uk From: Andrew Donnellan Date: Fri, 4 Nov 2016 13:07:15 +1100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Icedove/45.4.0 MIME-Version: 1.0 In-Reply-To: <581B110F.9050805@linux.vnet.ibm.com> Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 7bit X-TM-AS-MML: disable X-Content-Scanned: Fidelis XPS MAILER x-cbid: 16110402-0052-0000-0000-000001E31715 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 16110402-0053-0000-0000-000007201AD1 Message-Id: X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:,, definitions=2016-11-04_01:,, signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 suspectscore=0 malwarescore=0 phishscore=0 adultscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1609300000 definitions=main-1611040038 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 668 Lines: 17 On 03/11/16 21:27, Ravi Bangoria wrote: > Yes, kernel-space hw-breakpoint feature is broken on LE without this. Is there any actual user-visible feature that depends on this, or is this solely for debugging and development purposes? It would of course be *nice* to have it in stable trees (particularly so we pick it up in distros) but I'm not convinced that enabling HW breakpoints on a platform where it has *never* worked qualifies as an "actual bug". (BTW many thanks for fixing this - I had a shot at it late last year but never quite got there!) -- Andrew Donnellan OzLabs, ADL Canberra andrew.donnellan@au1.ibm.com IBM Australia Limited