Received: by 2002:a25:ab43:0:0:0:0:0 with SMTP id u61csp2897076ybi; Mon, 17 Jun 2019 12:17:11 -0700 (PDT) X-Google-Smtp-Source: APXvYqwfRiLlNPuH8a/J4nA6/K5A2+ecI4ai8oLG91Dx6zk6o1jP1bNdMEuIw6TVShLs+nYZ6aAQ X-Received: by 2002:aa7:934f:: with SMTP id 15mr35195232pfn.238.1560799031644; Mon, 17 Jun 2019 12:17:11 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1560799031; cv=none; d=google.com; s=arc-20160816; b=Nxi63rxcDO52HaSy3iaaZ3DphX9CVJLh1SEb1hpBs+0/MOfjomPVxitIcon6a46Si4 KMvhjDQyiRYE9uAsSkGSQf04MQ1asmursu3JQaFSooYeOboTAR+1hHFEQHdW/seuXg5h EiHPMh/Vp6fWfE5BzOUC7200cxEI9WM20sWfbai73UebSJXR6nfi6A4ousc/c9a6La1N W+DurVfHA8JXL/XSn8BbQKd9+mRNCQakHJUI5hN9HL7QDbdHj5eYr24yauLG92W2xLLD /b+d2/3U+cYvSzGxHSWA6wnB47jnoLgUkqu5QTUkU3rrxfa+HvSrSwfG9L+3AIiCQiV5 bKNw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:mime-version:content-transfer-encoding :content-id:content-language:accept-language:in-reply-to:references :message-id:date:thread-index:thread-topic:subject:cc:to:from :dkim-signature; bh=8K8T3TIgSicvMlb2LLZx8h0iRKdQzJzV/bH5/7XtmL0=; b=P/jIhEGOr+rfesroTtpc6yWALxdsXRuWsv4EO5ZlQuOerlFs3PmDTHW9wiANbLV/UN L1XZ//sOwVJtsZMs0DeDZJbMvueO9uJujQ7lyRIfsyRk+wHHoSPz58RM0b6UuYO+4Hgc Ja5X89fL4Fz4srSqfgm3/GUwqeAOoOZszKN9nbMrqut2x0wu4MytZuymjqDYbGk/o6nV 4al/YjjH0bpXdvayP/aNCQD/1KZ6ygd1L+zFeWrKc4+ITXj5QCAySA5UuRcV14JpnS4Q MF33N2KkQrRs//owakiyfb9CPWQfNLyjGvvb9ZR2Qh7sJTMnyVDBg1N0HdoV2FEIqT7b Xs0w== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@vmware.com header.s=selector2 header.b=mDtEP6G1; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=QUARANTINE sp=NONE dis=NONE) header.from=vmware.com Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id t8si11359026pgh.235.2019.06.17.12.16.50; Mon, 17 Jun 2019 12:17:11 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; dkim=pass header.i=@vmware.com header.s=selector2 header.b=mDtEP6G1; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=QUARANTINE sp=NONE dis=NONE) header.from=vmware.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728881AbfFQTO5 (ORCPT + 99 others); Mon, 17 Jun 2019 15:14:57 -0400 Received: from mail-eopbgr690079.outbound.protection.outlook.com ([40.107.69.79]:23367 "EHLO NAM04-CO1-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1725829AbfFQTO4 (ORCPT ); Mon, 17 Jun 2019 15:14:56 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=vmware.com; s=selector2; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=8K8T3TIgSicvMlb2LLZx8h0iRKdQzJzV/bH5/7XtmL0=; b=mDtEP6G1qjO6uAS0twbEcnruaBm3KXxVJ6qoHYrRU5JupaYRyrZnXRCWZTL9ZRcxi+ZVQ8CIXXZWXmxr+fYnlw2fPpYh81i8sOKnv0H0BpJBBYKdIUImcixIPJ/4qhmdq+s2SGecrbpp8bs/DChMtJxvL74AmbEK6bjqzoGX4Yg= Received: from BYAPR05MB4776.namprd05.prod.outlook.com (52.135.233.146) by BYAPR05MB4056.namprd05.prod.outlook.com (52.135.199.33) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.2008.7; Mon, 17 Jun 2019 19:14:53 +0000 Received: from BYAPR05MB4776.namprd05.prod.outlook.com ([fe80::f493:3bba:aabf:dd58]) by BYAPR05MB4776.namprd05.prod.outlook.com ([fe80::f493:3bba:aabf:dd58%7]) with mapi id 15.20.2008.007; Mon, 17 Jun 2019 19:14:53 +0000 From: Nadav Amit To: Sasha Levin , Bjorn Helgaas CC: Andrew Morton , LKML , "linux-mm@kvack.org" , "stable@vger.kernel.org" , Borislav Petkov , Toshi Kani , Peter Zijlstra , Dave Hansen , Dan Williams , Bjorn Helgaas , Ingo Molnar Subject: Re: [PATCH 1/3] resource: Fix locking in find_next_iomem_res() Thread-Topic: [PATCH 1/3] resource: Fix locking in find_next_iomem_res() Thread-Index: AQHVJUDxxzjy50ovskyMqR/CoOwaLQ== Date: Mon, 17 Jun 2019 19:14:53 +0000 Message-ID: <549284C3-6A1C-4434-B716-FF9B0C87EE45@vmware.com> References: <20190613045903.4922-2-namit@vmware.com> <20190615221557.CD1492183F@mail.kernel.org> In-Reply-To: <20190615221557.CD1492183F@mail.kernel.org> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: authentication-results: spf=none (sender IP is ) smtp.mailfrom=namit@vmware.com; x-originating-ip: [66.170.99.1] x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: 2a2424f7-1b98-4854-f624-08d6f35813cc x-microsoft-antispam: BCL:0;PCL:0;RULEID:(2390118)(7020095)(4652040)(8989299)(5600148)(711020)(4605104)(1401327)(4534185)(4627221)(201703031133081)(201702281549075)(8990200)(2017052603328)(7193020);SRVR:BYAPR05MB4056; x-ms-traffictypediagnostic: BYAPR05MB4056: x-microsoft-antispam-prvs: x-ms-oob-tlc-oobclassifiers: OLM:3513; x-forefront-prvs: 0071BFA85B x-forefront-antispam-report: SFV:NSPM;SFS:(10009020)(39860400002)(366004)(396003)(376002)(136003)(346002)(199004)(189003)(14454004)(71190400001)(6512007)(6116002)(3846002)(81166006)(64756008)(7736002)(6486002)(305945005)(6436002)(71200400001)(81156014)(8936002)(53936002)(229853002)(14444005)(186003)(102836004)(99286004)(76116006)(8676002)(53546011)(256004)(6506007)(76176011)(26005)(73956011)(66946007)(486006)(36756003)(476003)(446003)(5660300002)(33656002)(2616005)(11346002)(316002)(66556008)(68736007)(66066001)(2906002)(7416002)(478600001)(4326008)(86362001)(54906003)(25786009)(6246003)(110136005)(66476007)(66446008);DIR:OUT;SFP:1101;SCL:1;SRVR:BYAPR05MB4056;H:BYAPR05MB4776.namprd05.prod.outlook.com;FPR:;SPF:None;LANG:en;PTR:InfoNoRecords;A:1;MX:1; received-spf: None (protection.outlook.com: vmware.com does not designate permitted sender hosts) x-ms-exchange-senderadcheck: 1 x-microsoft-antispam-message-info: S9IQ6kuBQZ7KMNxRKL/WFB1jmW3UyoU3t8BHsy7uxC3ecxyGbajKTnIDBR+tPU+mMsGFR2unbpB5iBsl85DvvepGEieojsNmUJ5albruLY+33kndDKFB4CaQU3lQNuN8c6C3VxiqP26OeqCh7uaBUOIOmwdhbO+7WK5nA/Y2D7VSVxFAZOgKfAn6O8GSJdFW9XEG5Ph1KYS8UpKFWANWPZD8UKOIWssoE3RXEG4TKRXzKfHClI02Qz6GsnXNEX9La16y0+AmHyLwfg1AuNzDGcSxmTIqdXZ+b7QhV4bURwCRACEh9XpIQOMHdFe1mo0WCtVv2cpeyVo3oORD5qsBnUenQWl5sfg7BQCHfHUyHlPCySMPs5X2Uvm56wACX8GYYD94MlaMV3i11Gf6asCUuoBL/mGW/GzVL4OMbiG44cM= Content-Type: text/plain; charset="utf-8" Content-ID: <8E477B3DEBEC0A41904E840C4D6E1CF8@namprd05.prod.outlook.com> Content-Transfer-Encoding: base64 MIME-Version: 1.0 X-OriginatorOrg: vmware.com X-MS-Exchange-CrossTenant-Network-Message-Id: 2a2424f7-1b98-4854-f624-08d6f35813cc X-MS-Exchange-CrossTenant-originalarrivaltime: 17 Jun 2019 19:14:53.3285 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: b39138ca-3cee-4b4a-a4d6-cd83d9dd62f0 X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: namit@vmware.com X-MS-Exchange-Transport-CrossTenantHeadersStamped: BYAPR05MB4056 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org PiBPbiBKdW4gMTUsIDIwMTksIGF0IDM6MTUgUE0sIFNhc2hhIExldmluIDxzYXNoYWxAa2VybmVs Lm9yZz4gd3JvdGU6DQo+IA0KPiBIaSwNCj4gDQo+IFtUaGlzIGlzIGFuIGF1dG9tYXRlZCBlbWFp bF0NCj4gDQo+IFRoaXMgY29tbWl0IGhhcyBiZWVuIHByb2Nlc3NlZCBiZWNhdXNlIGl0IGNvbnRh aW5zIGEgIkZpeGVzOiIgdGFnLA0KPiBmaXhpbmcgY29tbWl0OiBmZjNjYzk1MmQzZjAgcmVzb3Vy Y2U6IEFkZCByZW1vdmVfcmVzb3VyY2UgaW50ZXJmYWNlLg0KPiANCj4gVGhlIGJvdCBoYXMgdGVz dGVkIHRoZSBmb2xsb3dpbmcgdHJlZXM6IHY1LjEuOSwgdjQuMTkuNTAsIHY0LjE0LjEyNSwgdjQu OS4xODEuDQo+IA0KPiB2NS4xLjk6IEJ1aWxkIE9LIQ0KPiB2NC4xOS41MDogRmFpbGVkIHRvIGFw cGx5ISBQb3NzaWJsZSBkZXBlbmRlbmNpZXM6DQo+ICAgIDAxMGE5M2JmOTdjNyAoInJlc291cmNl OiBGaXggZmluZF9uZXh0X2lvbWVtX3JlcygpIGl0ZXJhdGlvbiBpc3N1ZSIpDQo+ICAgIGE5ODk1 OWZkYmRhMSAoInJlc291cmNlOiBJbmNsdWRlIHJlc291cmNlIGVuZCBpbiB3YWxrXyooKSBpbnRl cmZhY2VzIikNCj4gDQo+IHY0LjE0LjEyNTogRmFpbGVkIHRvIGFwcGx5ISBQb3NzaWJsZSBkZXBl bmRlbmNpZXM6DQo+ICAgIDAxMGE5M2JmOTdjNyAoInJlc291cmNlOiBGaXggZmluZF9uZXh0X2lv bWVtX3JlcygpIGl0ZXJhdGlvbiBpc3N1ZSIpDQo+ICAgIDBlNGMxMmI0NWFhOCAoIng4Ni9tbSwg cmVzb3VyY2U6IFVzZSBQQUdFX0tFUk5FTCBwcm90ZWN0aW9uIGZvciBpb3JlbWFwIG9mIG1lbW9y eSBwYWdlcyIpDQo+ICAgIDFkMmU3MzNiMTNiNCAoInJlc291cmNlOiBQcm92aWRlIHJlc291cmNl IHN0cnVjdCBpbiByZXNvdXJjZSB3YWxrIGNhbGxiYWNrIikNCj4gICAgNGFjMmFlZDgzN2NiICgi cmVzb3VyY2U6IENvbnNvbGlkYXRlIHJlc291cmNlIHdhbGtpbmcgY29kZSIpDQo+ICAgIGE5ODk1 OWZkYmRhMSAoInJlc291cmNlOiBJbmNsdWRlIHJlc291cmNlIGVuZCBpbiB3YWxrXyooKSBpbnRl cmZhY2VzIikNCj4gDQo+IHY0LjkuMTgxOiBGYWlsZWQgdG8gYXBwbHkhIFBvc3NpYmxlIGRlcGVu ZGVuY2llczoNCj4gICAgMDEwYTkzYmY5N2M3ICgicmVzb3VyY2U6IEZpeCBmaW5kX25leHRfaW9t ZW1fcmVzKCkgaXRlcmF0aW9uIGlzc3VlIikNCj4gICAgMGU0YzEyYjQ1YWE4ICgieDg2L21tLCBy ZXNvdXJjZTogVXNlIFBBR0VfS0VSTkVMIHByb3RlY3Rpb24gZm9yIGlvcmVtYXAgb2YgbWVtb3J5 IHBhZ2VzIikNCj4gICAgMWQyZTczM2IxM2I0ICgicmVzb3VyY2U6IFByb3ZpZGUgcmVzb3VyY2Ug c3RydWN0IGluIHJlc291cmNlIHdhbGsgY2FsbGJhY2siKQ0KPiAgICA0YWMyYWVkODM3Y2IgKCJy ZXNvdXJjZTogQ29uc29saWRhdGUgcmVzb3VyY2Ugd2Fsa2luZyBjb2RlIikNCj4gICAgNjBmZTM5 MTBiYjAyICgia2V4ZWNfZmlsZTogQWxsb3cgYXJjaC1zcGVjaWZpYyBtZW1vcnkgd2Fsa2luZyBm b3Iga2V4ZWNfYWRkX2J1ZmZlciIpDQo+ICAgIGEwNDU4Mjg0ZjA2MiAoInBvd2VycGM6IEFkZCBz dXBwb3J0IGNvZGUgZm9yIGtleGVjX2ZpbGVfbG9hZCgpIikNCj4gICAgYTk4OTU5ZmRiZGExICgi cmVzb3VyY2U6IEluY2x1ZGUgcmVzb3VyY2UgZW5kIGluIHdhbGtfKigpIGludGVyZmFjZXMiKQ0K PiAgICBkYTY2NTg4NTliOWMgKCJwb3dlcnBjOiBDaGFuZ2UgcGxhY2VzIHVzaW5nIENPTkZJR19L RVhFQyB0byB1c2UgQ09ORklHX0tFWEVDX0NPUkUgaW5zdGVhZC4iKQ0KPiAgICBlYzJiOWJmYWFj NDQgKCJrZXhlY19maWxlOiBDaGFuZ2Uga2V4ZWNfYWRkX2J1ZmZlciB0byB0YWtlIGtleGVjX2J1 ZiBhcyBhcmd1bWVudC4iKQ0KDQpJcyB0aGVyZSBhIHJlYXNvbiAwMTBhOTNiZjk3YzcgKCJyZXNv dXJjZTogRml4IGZpbmRfbmV4dF9pb21lbV9yZXMoKQ0KaXRlcmF0aW9uIGlzc3Vl4oCdKSB3YXMg bm90IGJhY2twb3J0ZWQ/DQoNCkZvciA0LjE5IHRoZSBmb2xsb3dpbmcgcGFzc2VzIGNvbXBpbGF0 aW9uLg0KDQotLSA+OCAtLQ0KDQpGcm9tOiBOYWRhdiBBbWl0IDxuYW1pdEB2bXdhcmUuY29tPg0K U3ViamVjdDogW1BBVENIXSByZXNvdXJjZTogRml4IGxvY2tpbmcgaW4gZmluZF9uZXh0X2lvbWVt X3JlcygpDQoNClNpbmNlIHJlc291cmNlcyBjYW4gYmUgcmVtb3ZlZCwgbG9ja2luZyBzaG91bGQg ZW5zdXJlIHRoYXQgdGhlIHJlc291cmNlDQppcyBub3QgcmVtb3ZlZCB3aGlsZSBhY2Nlc3Npbmcg aXQuIEhvd2V2ZXIsIGZpbmRfbmV4dF9pb21lbV9yZXMoKSBkb2VzDQpub3QgaG9sZCB0aGUgbG9j ayB3aGlsZSBjb3B5aW5nIHRoZSBkYXRhIG9mIHRoZSByZXNvdXJjZS4gS2VlcCBob2xkaW5nDQp0 aGUgbG9jayB3aGlsZSB0aGUgZGF0YSBpcyBjb3BpZWQuDQoNCkZpeGVzOiBmZjNjYzk1MmQzZjAw ICgicmVzb3VyY2U6IEFkZCByZW1vdmVfcmVzb3VyY2UgaW50ZXJmYWNlIikNCkNjOiBzdGFibGVA dmdlci5rZXJuZWwub3JnDQpDYzogQm9yaXNsYXYgUGV0a292IDxicEBzdXNlLmRlPg0KQ2M6IFRv c2hpIEthbmkgPHRvc2hpLmthbmlAaHBlLmNvbT4NCkNjOiBQZXRlciBaaWpsc3RyYSA8cGV0ZXJ6 QGluZnJhZGVhZC5vcmc+DQpDYzogRGF2ZSBIYW5zZW4gPGRhdmUuaGFuc2VuQGxpbnV4LmludGVs LmNvbT4NCkNjOiBEYW4gV2lsbGlhbXMgPGRhbi5qLndpbGxpYW1zQGludGVsLmNvbT4NCkNjOiBC am9ybiBIZWxnYWFzIDxiaGVsZ2Fhc0Bnb29nbGUuY29tPg0KQ2M6IEluZ28gTW9sbmFyIDxtaW5n b0BrZXJuZWwub3JnPg0KU2lnbmVkLW9mZi1ieTogTmFkYXYgQW1pdCA8bmFtaXRAdm13YXJlLmNv bT4NCi0tLQ0KIGtlcm5lbC9yZXNvdXJjZS5jIHwgMTMgKysrKysrKysrLS0tLQ0KIDEgZmlsZSBj aGFuZ2VkLCA5IGluc2VydGlvbnMoKyksIDQgZGVsZXRpb25zKC0pDQoNCmRpZmYgLS1naXQgYS9r ZXJuZWwvcmVzb3VyY2UuYyBiL2tlcm5lbC9yZXNvdXJjZS5jDQppbmRleCAzMGUxYmM2ODUwM2Iu LjAyMDFmZWFkZTdkNSAxMDA2NDQNCi0tLSBhL2tlcm5lbC9yZXNvdXJjZS5jDQorKysgYi9rZXJu ZWwvcmVzb3VyY2UuYw0KQEAgLTMzMSw2ICszMzEsNyBAQCBzdGF0aWMgaW50IGZpbmRfbmV4dF9p b21lbV9yZXMoc3RydWN0IHJlc291cmNlICpyZXMsIHVuc2lnbmVkIGxvbmcgZGVzYywNCiAJcmVz b3VyY2Vfc2l6ZV90IHN0YXJ0LCBlbmQ7DQogCXN0cnVjdCByZXNvdXJjZSAqcDsNCiAJYm9vbCBz aWJsaW5nX29ubHkgPSBmYWxzZTsNCisJaW50IHIgPSAwOw0KIA0KIAlCVUdfT04oIXJlcyk7DQog DQpAQCAtMzU2LDkgKzM1NywxMSBAQCBzdGF0aWMgaW50IGZpbmRfbmV4dF9pb21lbV9yZXMoc3Ry dWN0IHJlc291cmNlICpyZXMsIHVuc2lnbmVkIGxvbmcgZGVzYywNCiAJCQlicmVhazsNCiAJfQ0K IA0KLQlyZWFkX3VubG9jaygmcmVzb3VyY2VfbG9jayk7DQotCWlmICghcCkNCi0JCXJldHVybiAt MTsNCisJaWYgKCFwKSB7DQorCQlyID0gLTE7DQorCQlnb3RvIG91dDsNCisJfQ0KKw0KIAkvKiBj b3B5IGRhdGEgKi8NCiAJaWYgKHJlcy0+c3RhcnQgPCBwLT5zdGFydCkNCiAJCXJlcy0+c3RhcnQg PSBwLT5zdGFydDsNCkBAIC0zNjYsNyArMzY5LDkgQEAgc3RhdGljIGludCBmaW5kX25leHRfaW9t ZW1fcmVzKHN0cnVjdCByZXNvdXJjZSAqcmVzLCB1bnNpZ25lZCBsb25nIGRlc2MsDQogCQlyZXMt PmVuZCA9IHAtPmVuZDsNCiAJcmVzLT5mbGFncyA9IHAtPmZsYWdzOw0KIAlyZXMtPmRlc2MgPSBw LT5kZXNjOw0KLQlyZXR1cm4gMDsNCitvdXQ6DQorCXJlYWRfdW5sb2NrKCZyZXNvdXJjZV9sb2Nr KTsNCisJcmV0dXJuIHI7DQogfQ0KIA0KIHN0YXRpYyBpbnQgX193YWxrX2lvbWVtX3Jlc19kZXNj KHN0cnVjdCByZXNvdXJjZSAqcmVzLCB1bnNpZ25lZCBsb25nIGRlc2MsDQotLSANCjIuMTcuMQ==