From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1161361AbcHEMfa (ORCPT ); Fri, 5 Aug 2016 08:35:30 -0400 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:28200 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1161222AbcHEMf3 (ORCPT ); Fri, 5 Aug 2016 08:35:29 -0400 X-IBM-Helo: d24dlp02.br.ibm.com X-IBM-MailFrom: mauricfo@linux.vnet.ibm.com X-IBM-RcptTo: linux-doc@vger.kernel.org;linux-kernel@vger.kernel.org Subject: Re: [PATCH v4 0/3] dma-mapping, powerpc, nvme: introduce the DMA_ATTR_NO_WARN attribute To: Andrew Morton References: <1470092390-25451-1-git-send-email-mauricfo@linux.vnet.ibm.com> <20160804150145.fb5690e9a873121db1dfa0b1@linux-foundation.org> <57A3DB17.3060603@linux.vnet.ibm.com> <20160804180501.f80c9b919341c486e2a95894@linux-foundation.org> Cc: linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-nvme@lists.infradead.org, corbet@lwn.net, rmk+kernel@arm.linux.org.uk, keith.busch@intel.com, axboe@fb.com, benh@kernel.crashing.org, mpe@ellerman.id.au, k.kozlowski@samsung.com From: Mauricio Faria de Oliveira Date: Fri, 5 Aug 2016 09:34:20 -0300 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.8.0 MIME-Version: 1.0 In-Reply-To: <20160804180501.f80c9b919341c486e2a95894@linux-foundation.org> 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: 16080512-0020-0000-0000-0000022B700C X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 16080512-0021-0000-0000-0000301282FB Message-Id: <57A487CC.3040205@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:,, definitions=2016-08-05_09:,, 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=8.0.1-1604210000 definitions=main-1608050152 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 08/04/2016 10:05 PM, Andrew Morton wrote: > Of course, the alternative is to just delete the damn warnings from > ppc_iommu_map_sg(). Imagine that! Have they ever been of any use to > anyone? Sure. I submitted a patch to convert it to dynamic debug (so it would still be available if one wanted to), but it wasn't accepted [1]; so I guess it apparently is, in some cases. [1] https://lists.ozlabs.org/pipermail/linuxppc-dev/2016-June/144196.html thanks -- Mauricio Faria de Oliveira IBM Linux Technology Center