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Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Tue, 21 Apr 2020 10:58:10 +0100 Received: from d06av22.portsmouth.uk.ibm.com (d06av22.portsmouth.uk.ibm.com [9.149.105.58]) by b06cxnps4075.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 03L9wWoo65339574 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Tue, 21 Apr 2020 09:58:32 GMT Received: from d06av22.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 087954C044; Tue, 21 Apr 2020 09:58:32 +0000 (GMT) Received: from d06av22.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 88C334C04E; Tue, 21 Apr 2020 09:58:31 +0000 (GMT) Received: from oc7455500831.ibm.com (unknown [9.145.151.164]) by d06av22.portsmouth.uk.ibm.com (Postfix) with ESMTP; Tue, 21 Apr 2020 09:58:31 +0000 (GMT) Subject: Re: stop using ioctl_by_bdev in the s390 DASD driver To: Christoph Hellwig , Stefan Haberland , Jan Hoeppner , Jens Axboe , Heiko Carstens , Vasily Gorbik Cc: linux-s390@vger.kernel.org, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org References: <20200421061226.33731-1-hch@lst.de> From: Christian Borntraeger Autocrypt: addr=borntraeger@de.ibm.com; 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Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.6.0 MIME-Version: 1.0 In-Reply-To: <20200421061226.33731-1-hch@lst.de> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 x-cbid: 20042109-0012-0000-0000-000003A88042 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 20042109-0013-0000-0000-000021E5CD28 Message-Id: X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.138,18.0.676 definitions=2020-04-21_03:2020-04-20,2020-04-21 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1015 impostorscore=0 suspectscore=0 lowpriorityscore=0 mlxlogscore=666 bulkscore=0 priorityscore=1501 spamscore=0 malwarescore=0 adultscore=0 mlxscore=0 phishscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2003020000 definitions=main-2004210079 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 21.04.20 08:12, Christoph Hellwig wrote: > Hi Jens and DASD maintainers, > > can you take a look at this series, which stops the DASD driver from > issuing ioctls from kernel space, in preparation of removing > ioctl_by_bdev. I don't really like the new s390-only method, but short > of forcing the dasd driver to be built into the kernel I can't think of > anything better. But maybe the s390 maintainers are fine with forcing > the DASD driver to be built in, in which case we could go down that > route? Hmm the defconfig results in dasd built-in anyway. But distros really like to keep it modular. Hmm, we do have obj-$(CONFIG_DASD) += dasd_mod.o obj-$(CONFIG_DASD_DIAG) += dasd_diag_mod.o obj-$(CONFIG_DASD_ECKD) += dasd_eckd_mod.o obj-$(CONFIG_DASD_FBA) += dasd_fba_mod.o Would it work to make CONFIG_DASD built-in only and keep the other 3 as modules? Not sure about the implications.