From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 08F75C433EF for ; Mon, 4 Apr 2022 14:43:28 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 910098D0012; Mon, 4 Apr 2022 10:36:00 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 870EF8D0011; Mon, 4 Apr 2022 10:36:00 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 625B68D0010; Mon, 4 Apr 2022 10:36:00 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0103.hostedemail.com [216.40.44.103]) by kanga.kvack.org (Postfix) with ESMTP id 4D82F8D000A for ; Mon, 4 Apr 2022 10:36:00 -0400 (EDT) Received: from smtpin17.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay02.hostedemail.com (Postfix) with ESMTP id 087D8ACF62 for ; Mon, 4 Apr 2022 14:35:50 +0000 (UTC) X-FDA: 79319445660.17.F76A321 Received: from mx0b-00069f02.pphosted.com (mx0b-00069f02.pphosted.com [205.220.177.32]) by imf19.hostedemail.com (Postfix) with ESMTP id 462561A0007 for ; Mon, 4 Apr 2022 14:35:48 +0000 (UTC) Received: from pps.filterd (m0246630.ppops.net [127.0.0.1]) by mx0b-00069f02.pphosted.com (8.16.1.2/8.16.1.2) with SMTP id 234DncS1012575; Mon, 4 Apr 2022 14:35:48 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h=from : to : subject : date : message-id : references : in-reply-to : content-type : content-transfer-encoding : mime-version; s=corp-2021-07-09; bh=HqEzxfb7vYcsBLxA1MHbi67kU0vkdosDz4gDWGEYaOQ=; b=MTWThaJoerIVFQgIfj7vUAHBhHMxr8WjtpZnHJqYfnJTaGnxlXnMt5A/ijlPvRdwfyuw fRXixxh2+gt7K+t9HBUeyEMWE/p6RlFUXxzwGtMAKk1lu3FuAQsdNgcpyVmOSfGUHtFE fVA3pCXQ00Kra932/QZ+qp035lh9x72/MAhQzgGsK8wnqqMXB0HVEnF/ByvVSX5P+r3R VleBPtV5cNns373EkYqyhiIqjVOCaiPBg5fS1SL6HydVTvOcrf37D2QqtlAet4Ug1H7x OBEvPiu4u1tHOigXRyz0/iQiJYqG8BuWDMjqxYMUH9x80EQ1sf/ChwupgOutQxY/BMeI Vw== Received: from phxpaimrmta01.imrmtpd1.prodappphxaev1.oraclevcn.com (phxpaimrmta01.appoci.oracle.com [138.1.114.2]) by mx0b-00069f02.pphosted.com with ESMTP id 3f6cwcbbnq-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Mon, 04 Apr 2022 14:35:48 +0000 Received: from pps.filterd (phxpaimrmta01.imrmtpd1.prodappphxaev1.oraclevcn.com [127.0.0.1]) by phxpaimrmta01.imrmtpd1.prodappphxaev1.oraclevcn.com (8.16.1.2/8.16.1.2) with SMTP id 234EGQE1028988; Mon, 4 Apr 2022 14:35:47 GMT Received: from nam12-mw2-obe.outbound.protection.outlook.com (mail-mw2nam12lp2046.outbound.protection.outlook.com [104.47.66.46]) by phxpaimrmta01.imrmtpd1.prodappphxaev1.oraclevcn.com with ESMTP id 3f6cx2c8h2-5 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Mon, 04 Apr 2022 14:35:47 +0000 ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=OZlQF0UxReT+3ZE3UCCUEKboYnqnZuS7MtVpKeUHi1Txlx6rcqhevJ+hv1X8mJZCoTDRRLEqOiqJOhFy9qAskczpYiznw8nsnT9A/1h+019gni8m+Yrwg8I6F6VMPyIQoLWJMu+EK6hnK/O1XJkK7pI4D+XlfDw58ll+SzcHmwPdasOiVINl/XgiHhnqlw/bFXRy4Z3tDNhuWfhtRVnpDGP769UkZWa6P3dkH3qsVZaryKYhrX1GoGNw68YXOOT4S307j6/WGxxqQusfYo7HEnfeKZUa4U74uUnhKDZZvV5t+43Z2OphoxOEiY2ksYRbCni/psqRIxXSnR1LkSc4OQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1; bh=HqEzxfb7vYcsBLxA1MHbi67kU0vkdosDz4gDWGEYaOQ=; b=DY07TzWTZTIXRx8w/TnmcNurObGxr2AI4+M/VKennsU7rg59jiV/JJhsVGxSodhLALZixTWSPzuiQpFqOnjlc+Vj7AFFOFDIy6GelFRFSOcXCjAcgqsQbTU5Jp/G+g0hxOA1kvaitmt3l0ragvjxbugqnYMrSFa0yIJKZsYZTVJo9uSBhiByO1na5drEwUUEF291AxdERg70IkDcaixCNDGcoYgVrjtbV5EbxKggo8jj4HI1jKN7J0ODm+PtwhoAtikvDLqlKaZotKdq+LTsFu5HwaCl54076eKZkqM2Do9d4z1HM1XYHc4Yj14bIBJEsgaJ3g3DCO0wZQTIO/TRVg== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=oracle.com; dmarc=pass action=none header.from=oracle.com; dkim=pass header.d=oracle.com; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.onmicrosoft.com; s=selector2-oracle-onmicrosoft-com; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=HqEzxfb7vYcsBLxA1MHbi67kU0vkdosDz4gDWGEYaOQ=; b=LmAN3W17WS3ZSOo2M5+l6znA5SrGYlADc4IyZBjB484bkMR7y+tT7QxFABhCUCCZx0nX+Voob2sKpPy0HxV8pTz/wg11gVtqJ3j7KEjTbYNITPk51fw0UoBsbJHJZmyiryRuTnM8PxY6T1y6VgirmLEWt6YLA/zOsEQiT/6vLDo= Received: from SN6PR10MB3022.namprd10.prod.outlook.com (2603:10b6:805:d8::25) by MW4PR10MB5812.namprd10.prod.outlook.com (2603:10b6:303:18e::22) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.5123.30; Mon, 4 Apr 2022 14:35:44 +0000 Received: from SN6PR10MB3022.namprd10.prod.outlook.com ([fe80::74fd:df41:4c93:24a5]) by SN6PR10MB3022.namprd10.prod.outlook.com ([fe80::74fd:df41:4c93:24a5%6]) with mapi id 15.20.5123.031; Mon, 4 Apr 2022 14:35:44 +0000 From: Liam Howlett To: "maple-tree@lists.infradead.org" , "linux-mm@kvack.org" , "linux-kernel@vger.kernel.org" , Andrew Morton Subject: [PATCH v7 21/70] xen: Use vma_lookup() in privcmd_ioctl_mmap() Thread-Topic: [PATCH v7 21/70] xen: Use vma_lookup() in privcmd_ioctl_mmap() Thread-Index: AQHYSDFCMQQvyyBBlkqT8YXXwhjCDg== Date: Mon, 4 Apr 2022 14:35:41 +0000 Message-ID: <20220404143501.2016403-22-Liam.Howlett@oracle.com> References: <20220404143501.2016403-1-Liam.Howlett@oracle.com> In-Reply-To: <20220404143501.2016403-1-Liam.Howlett@oracle.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-mailer: git-send-email 2.34.1 x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: 2ca42340-8e1f-4dce-558e-08da164866ac x-ms-traffictypediagnostic: MW4PR10MB5812:EE_ x-microsoft-antispam-prvs: x-ms-exchange-senderadcheck: 1 x-ms-exchange-antispam-relay: 0 x-microsoft-antispam: BCL:0; x-microsoft-antispam-message-info: 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 x-forefront-antispam-report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:SN6PR10MB3022.namprd10.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230001)(366004)(26005)(4744005)(6486002)(8936002)(1076003)(44832011)(83380400001)(6666004)(508600001)(5660300002)(6506007)(36756003)(71200400001)(2616005)(2906002)(186003)(91956017)(64756008)(66556008)(66476007)(66446008)(76116006)(66946007)(6512007)(38070700005)(86362001)(38100700002)(8676002)(316002)(122000001)(110136005);DIR:OUT;SFP:1101; x-ms-exchange-antispam-messagedata-chunkcount: 1 x-ms-exchange-antispam-messagedata-0: =?iso-8859-1?Q?jOUHAWGJTmt1VcPYPF+7zAZ6t9da0GZ/Qy+QPjcLhg8ZGE7IyhhFEbRv7x?= =?iso-8859-1?Q?f2eiMaYB5/QnxounnorVhK0PuCoVG9ZHE6MjXaCrZ7sqZGxAu5mJw61pgi?= =?iso-8859-1?Q?Pa1v4mQk6ABah0U4Qm84IJTkaYfGSC2wN2vwsQAcTgLq0GhM/B9zybofzF?= =?iso-8859-1?Q?G39WG5QhBSNH7VvKHSIqUL/sq3Watu24Qgtb7xwZQDtcXGWXXCQOlieeG4?= =?iso-8859-1?Q?T2dQPxNUMfkdyeSKBMpMgXpohLO9YpiGdxxVthD9XmvaHB84sbyOVI1GbK?= =?iso-8859-1?Q?JfkwSqv/xXaM+KSdgtGTPYFJ0PkhsPjG8NNjGFCRnILbiToV5wsViJsoIG?= =?iso-8859-1?Q?BMYj1XNi+otKvmoVDPKcsUda3qI6YMcwcoKmSYIukKe6g53gxs8nvisn+w?= =?iso-8859-1?Q?wORkVX8OoktTTgn/ENEswhQhbJVV09AeqH+oGSPPrq9cdJk3vKEBg1gs0e?= =?iso-8859-1?Q?Oo9iLkpFl8CQ4tGBu6kmzA45ThaRp9kvFnLiyJHGAfM876IK3+PKRPSlUV?= =?iso-8859-1?Q?aPqiEcTvjcyM87YGCgytQ3UCavVhFkOmDbSGjcYj4MZvZStDs5ZPOnWU7E?= =?iso-8859-1?Q?3oeRKA2WRwNxr/vIUt3KvvCa3cqHS4lVszRVbyJTMgaDJQWnGtV9bNEp/j?= =?iso-8859-1?Q?aBgQQaMxYj8/YXTpsTJAggMKSl1KEIY2yC0eLAtNPWV4AZMXyVANiHeZ2n?= =?iso-8859-1?Q?zOkV+g4ng7M3hqMmokUHI8tYh1zitxqTnTCCw6bAAOW+0YmBBRO4YzgY2D?= =?iso-8859-1?Q?3SuQWAzC6xNVqPGFOL2pzfrqvP7AwvRx6AYgTFDX6rWqvIqdL7OgINiqHm?= =?iso-8859-1?Q?SmE3onqLFgWPkZ2mWLFG1Zcqe7YKD43+wwQnzioK7Ox/+CWY1eWAIC4uMH?= =?iso-8859-1?Q?IKO2psHjAu90KCjG3fOH7VLqMc3TAuHZYN4feLr80gWCJ/zVlmAGrk7jzv?= =?iso-8859-1?Q?mFZZO8HnZsUdIXaGUJvQrW4TQrNFiZyjDJftjNdhrRLQgXYwpsLb8T9VOn?= =?iso-8859-1?Q?nnk+eifqZCUhOSRelOU1QQGZD6/x91UrqVsi+Q0Gnx6thgFJ3xnEZI7SBp?= =?iso-8859-1?Q?LcFTnHnRp2ZwR2XcfYa1hmW6mQ/39Nu8a5uUXHiKCZkGaMqzYNfoCVWEEM?= =?iso-8859-1?Q?MYAS63rkevse48ooadpumxr7pyXHN6LLE8vCpbjp4/4u0XlIVDqUkiae+s?= =?iso-8859-1?Q?YhfsHXIAPbBWW1IOnIINXvyo8F/b+sQ4O+h/oV5JCq3jH1EPGO3y6M96n0?= =?iso-8859-1?Q?Q88RJh4LUQCDvdjnGTSYJ7rJGeQyocvFeVYChyDOlW/gVnJHdtNpdsl8G2?= =?iso-8859-1?Q?r7X0bQUWj6y7AwSdojM+YCBbm5QzALjrUwfYMT9ZJAI9OIuMHSKAfhzBa/?= =?iso-8859-1?Q?3bSxEOVCMcR78epwBYRTR6+gg8SpCGL2dtO5MGsJtOwL34aPfbvPMDNPsO?= =?iso-8859-1?Q?uwunnwUt+91hH48thiq4UYm5FG++8Ht4DVvIuQKm9V/PPgjx9ezVPBmtND?= =?iso-8859-1?Q?zto3kairgiWUEqRsYGeHs5/3DfkTaG4qExCixcm6sqI0xSF3seK4yZODPX?= =?iso-8859-1?Q?XsHjlHyp3XCHHOjbyyAdSb3on5gRA/zvszaNJpQRtqYhbQyycLZZLfGNEu?= =?iso-8859-1?Q?EE3elzf4SuTxh5EhhDji48T26TMnoI8op7DKPkOsz90cDKwx5V/uACEZyF?= =?iso-8859-1?Q?tLYn/7r9zdMjPoNYh7qEqNXGrRwYzusRhzd8gF5i/PJ+FBSxmI5fNR80zr?= =?iso-8859-1?Q?fKnQKeeoSsfTR/ZUDz6A6GSY47+6At20v7nwOooHdBQSvHbSo857VLCn31?= =?iso-8859-1?Q?wuph30ahzHaqyKBVTNtb28g4V1asLJg=3D?= Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: oracle.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-AuthSource: SN6PR10MB3022.namprd10.prod.outlook.com X-MS-Exchange-CrossTenant-Network-Message-Id: 2ca42340-8e1f-4dce-558e-08da164866ac X-MS-Exchange-CrossTenant-originalarrivaltime: 04 Apr 2022 14:35:41.3468 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 4e2c6054-71cb-48f1-bd6c-3a9705aca71b X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: fDD91gizPyye8dQVbCz+zcdTTP4/+dwYGO+h3hKRiXNXX5v+hka1FLNBZURMURSu98Nh3Ohs9LLhfBTNQCHr3A== X-MS-Exchange-Transport-CrossTenantHeadersStamped: MW4PR10MB5812 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.425,18.0.850 definitions=2022-04-04_06:2022-03-30,2022-04-04 signatures=0 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 malwarescore=0 spamscore=0 bulkscore=0 adultscore=0 mlxscore=0 phishscore=0 suspectscore=0 mlxlogscore=999 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2202240000 definitions=main-2204040082 X-Proofpoint-ORIG-GUID: ViAgp8NFxST6AGu80d_WCdy6z6UFcHB3 X-Proofpoint-GUID: ViAgp8NFxST6AGu80d_WCdy6z6UFcHB3 X-Stat-Signature: w8et97biy1et1s1k346ko6uk1f589h46 Authentication-Results: imf19.hostedemail.com; dkim=pass header.d=oracle.com header.s=corp-2021-07-09 header.b=MTWThaJo; dkim=pass header.d=oracle.onmicrosoft.com header.s=selector2-oracle-onmicrosoft-com header.b=LmAN3W17; spf=none (imf19.hostedemail.com: domain of liam.howlett@oracle.com has no SPF policy when checking 205.220.177.32) smtp.mailfrom=liam.howlett@oracle.com; dmarc=pass (policy=none) header.from=oracle.com X-Rspam-User: X-Rspamd-Server: rspam02 X-Rspamd-Queue-Id: 462561A0007 X-HE-Tag: 1649082948-179048 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: From: "Liam R. Howlett" vma_lookup() walks the VMA tree for a specific value, find_vma() will search the tree after walking to a specific value. It is more efficient to only walk to the requested value since privcmd_ioctl_mmap() will exit the loop if vm_start !=3D msg->va. Signed-off-by: Liam R. Howlett Acked-by: Vlastimil Babka --- drivers/xen/privcmd.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/xen/privcmd.c b/drivers/xen/privcmd.c index 3369734108af..ad17166b0ef6 100644 --- a/drivers/xen/privcmd.c +++ b/drivers/xen/privcmd.c @@ -282,7 +282,7 @@ static long privcmd_ioctl_mmap(struct file *file, void = __user *udata) struct page, lru); struct privcmd_mmap_entry *msg =3D page_address(page); =20 - vma =3D find_vma(mm, msg->va); + vma =3D vma_lookup(mm, msg->va); rc =3D -EINVAL; =20 if (!vma || (msg->va !=3D vma->vm_start) || vma->vm_private_data) --=20 2.34.1