From patchwork Tue Jun 4 09:13:57 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Aneesh Kumar K.V" X-Patchwork-Id: 10974467 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 3F97714B6 for ; Tue, 4 Jun 2019 09:14:28 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 2E64B27F97 for ; Tue, 4 Jun 2019 09:14:28 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 230BE28725; Tue, 4 Jun 2019 09:14:28 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_NONE autolearn=ham version=3.3.1 Received: from ml01.01.org (ml01.01.org [198.145.21.10]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id D410F27F97 for ; Tue, 4 Jun 2019 09:14:27 +0000 (UTC) Received: from [127.0.0.1] (localhost [IPv6:::1]) by ml01.01.org (Postfix) with ESMTP id C439921289DA8; Tue, 4 Jun 2019 02:14:27 -0700 (PDT) X-Original-To: linux-nvdimm@lists.01.org Delivered-To: linux-nvdimm@lists.01.org Received-SPF: Pass (sender SPF authorized) identity=mailfrom; client-ip=148.163.158.5; helo=mx0a-001b2d01.pphosted.com; envelope-from=aneesh.kumar@linux.ibm.com; receiver=linux-nvdimm@lists.01.org Received: from mx0a-001b2d01.pphosted.com (mx0b-001b2d01.pphosted.com [148.163.158.5]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ml01.01.org (Postfix) with ESMTPS id DD21E2125ADEF for ; Tue, 4 Jun 2019 02:14:25 -0700 (PDT) Received: from pps.filterd (m0098414.ppops.net [127.0.0.1]) by mx0b-001b2d01.pphosted.com (8.16.0.27/8.16.0.27) with SMTP id x5497cis072195 for ; Tue, 4 Jun 2019 05:14:25 -0400 Received: from e12.ny.us.ibm.com (e12.ny.us.ibm.com [129.33.205.202]) by mx0b-001b2d01.pphosted.com with ESMTP id 2swjgp0w2b-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Tue, 04 Jun 2019 05:14:24 -0400 Received: from localhost by e12.ny.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Tue, 4 Jun 2019 10:14:22 +0100 Received: from b01ledav006.gho.pok.ibm.com (b01ledav006.gho.pok.ibm.com [9.57.199.111]) by b01cxnp22033.gho.pok.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id x549ELax33816652 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Tue, 4 Jun 2019 09:14:22 GMT Received: from b01ledav006.gho.pok.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id CD6FEAC060; Tue, 4 Jun 2019 09:14:21 +0000 (GMT) Received: from b01ledav006.gho.pok.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 54B54AC05F; Tue, 4 Jun 2019 09:14:20 +0000 (GMT) Received: from skywalker.in.ibm.com (unknown [9.124.35.234]) by b01ledav006.gho.pok.ibm.com (Postfix) with ESMTP; Tue, 4 Jun 2019 09:14:20 +0000 (GMT) From: "Aneesh Kumar K.V" To: dan.j.williams@intel.com Subject: [PATCH v3 6/6] mm/nvdimm: Use correct alignment when looking at first pfn from a region Date: Tue, 4 Jun 2019 14:43:57 +0530 X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190604091357.32213-1-aneesh.kumar@linux.ibm.com> References: <20190604091357.32213-1-aneesh.kumar@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 x-cbid: 19060409-0060-0000-0000-0000034BD868 X-IBM-SpamModules-Scores: X-IBM-SpamModules-Versions: BY=3.00011212; HX=3.00000242; KW=3.00000007; PH=3.00000004; SC=3.00000286; SDB=6.01213037; UDB=6.00637528; IPR=6.00994104; MB=3.00027178; MTD=3.00000008; XFM=3.00000015; UTC=2019-06-04 09:14:24 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 19060409-0061-0000-0000-0000499E0C1E Message-Id: <20190604091357.32213-6-aneesh.kumar@linux.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:, , definitions=2019-06-04_07:, , signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=1 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=735 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1810050000 definitions=main-1906040061 X-BeenThere: linux-nvdimm@lists.01.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Linux-nvdimm developer list." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-mm@kvack.org, linuxppc-dev@lists.ozlabs.org, "Aneesh Kumar K.V" , linux-nvdimm@lists.01.org Errors-To: linux-nvdimm-bounces@lists.01.org Sender: "Linux-nvdimm" X-Virus-Scanned: ClamAV using ClamSMTP We already add the start_pad to the resource->start but fails to section align the start. This make sure with altmap we compute the right first pfn when start_pad is zero and we are doing an align down of start address. vmem_altmap_offset() adjust the section aligned base_pfn offset. So we need to make sure we account for the same when computing base_pfn. ie, for altmap_valid case, our pfn_first should be: pfn_first = altmap->base_pfn + vmem_altmap_offset(altmap); Signed-off-by: Aneesh Kumar K.V --- kernel/memremap.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/kernel/memremap.c b/kernel/memremap.c index 1490e63f69a9..bf488b8658e7 100644 --- a/kernel/memremap.c +++ b/kernel/memremap.c @@ -60,9 +60,11 @@ static unsigned long pfn_first(struct dev_pagemap *pgmap) struct vmem_altmap *altmap = &pgmap->altmap; unsigned long pfn; - pfn = res->start >> PAGE_SHIFT; - if (pgmap->altmap_valid) - pfn += vmem_altmap_offset(altmap); + if (pgmap->altmap_valid) { + pfn = altmap->base_pfn + vmem_altmap_offset(altmap); + } else + pfn = PHYS_PFN(res->start); + return pfn; }