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 X-Spam-Level: X-Spam-Status: No, score=-2.3 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 82CA0C433FF for ; Thu, 8 Aug 2019 16:30:29 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 53C532184E for ; Thu, 8 Aug 2019 16:30:29 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="TqWyzeq0"; dkim=fail reason="signature verification failed" (1024-bit key) header.d=armh.onmicrosoft.com header.i=@armh.onmicrosoft.com header.b="7LUZFP4Z"; dkim=fail reason="signature verification failed" (1024-bit key) header.d=armh.onmicrosoft.com header.i=@armh.onmicrosoft.com header.b="7LUZFP4Z" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 53C532184E Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:Content-ID:In-Reply-To: References:Message-ID:Date:Subject:To:From:Reply-To:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=RFyHmkaxA6q3sFmV3XIscg1qsSxFBLnffdCGFHF9MKw=; b=TqWyzeq0tHR8Qf bRrlsKtQOUUeAmVZasxBXgXIUzWtTRlGnKkVWXkENLOAitiXdBxzCzFkOIy/qTEx5VqoIMUYvzau4 unkfgY38itIt5pvVmt4bn8w8YMF/ninRbKBZ8Gb+lKICSnGqJ8PkMLN6O6AFHyr6oiDfT+VMtvzHb 7eBRFzEfUWneH1zIMR8G/9m4Wz4UNKhKAt32DOv1f5bjdku6blbYZL4cD7mrTCrWa0W8c4BPEnSe3 R2jliX4J0nNaR7ehwYZOT4a/lDJct3pHTdofijKcK5Ax1xKBJcm61JLbgR5rUIgjsPGxxsDjtpIXr 58k4W4pjcwvvF3cR6DGQ==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92 #3 (Red Hat Linux)) id 1hvlJ0-0005eg-WD; Thu, 08 Aug 2019 16:30:23 +0000 Received: from mail-eopbgr20061.outbound.protection.outlook.com ([40.107.2.61] helo=EUR02-VE1-obe.outbound.protection.outlook.com) by bombadil.infradead.org with esmtps (Exim 4.92 #3 (Red Hat Linux)) id 1hvlIx-0005e4-CZ for linux-arm-kernel@lists.infradead.org; Thu, 08 Aug 2019 16:30:20 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=armh.onmicrosoft.com; s=selector2-armh-onmicrosoft-com; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=DFNoaE82fbwF1pLpierq5ugKy9VddWwueDEfMzm07Qc=; b=7LUZFP4Z7EFFGreUlxmsqBzKd137RlC0g9WbCpKTxrn6MM2SGKCOYXqvQIUEGGKOKbRAA01DgKHBU2Wt9Q3iEvqYhaB5Xt5tobV3fPSiAgosyrL4iH6DTXB9VMtyTx/CnW7Xr2O9jUnqaJfIInLoHtsgi+vQA1e+t8VGL1/jAso= Received: from DB7PR08CA0062.eurprd08.prod.outlook.com (2603:10a6:10:26::39) by HE1PR0802MB2602.eurprd08.prod.outlook.com (2603:10a6:3:e2::14) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.2157.14; Thu, 8 Aug 2019 16:30:15 +0000 Received: from DB5EUR03FT033.eop-EUR03.prod.protection.outlook.com (2a01:111:f400:7e0a::203) by DB7PR08CA0062.outlook.office365.com (2603:10a6:10:26::39) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384) id 15.20.2136.16 via Frontend Transport; Thu, 8 Aug 2019 16:30:15 +0000 Authentication-Results: spf=temperror (sender IP is 63.35.35.123) smtp.mailfrom=arm.com; lists.infradead.org; dkim=pass (signature was verified) header.d=armh.onmicrosoft.com;lists.infradead.org; dmarc=temperror action=none header.from=arm.com; Received-SPF: TempError (protection.outlook.com: error in processing during lookup of arm.com: DNS Timeout) Received: from 64aa7808-outbound-1.mta.getcheckrecipient.com (63.35.35.123) by DB5EUR03FT033.mail.protection.outlook.com (10.152.20.76) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384) id 15.20.2052.18 via Frontend Transport; Thu, 8 Aug 2019 16:30:14 +0000 Received: ("Tessian outbound 1e6e633a5b56:v26"); Thu, 08 Aug 2019 16:30:09 +0000 X-CheckRecipientChecked: true X-CR-MTA-CID: 5dc4d4d36e4d8eae X-CR-MTA-TID: 64aa7808 Received: from 4ec352b2b000.1 (cr-mta-lb-1.cr-mta-net [104.47.9.57]) by 64aa7808-outbound-1.mta.getcheckrecipient.com id 97789F70-CE43-4B58-9E3F-625BD6BD1D00.1; Thu, 08 Aug 2019 16:30:04 +0000 Received: from EUR03-VE1-obe.outbound.protection.outlook.com (mail-ve1eur03lp2057.outbound.protection.outlook.com [104.47.9.57]) by 64aa7808-outbound-1.mta.getcheckrecipient.com with ESMTPS id 4ec352b2b000.1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-SHA384); Thu, 08 Aug 2019 16:30:04 +0000 ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=bixfryjyP5uhqQNBOQVJI8hHrvCuPbrLE+84f3MrCaN8ECiXUFc8wLrxjO1ZaYWOnUKMrwc1TXx4HiGPiGnfkVjPYHeES51KgucH2rLtg1U5xlgMdyCCn8Nudq6px8HQFCut09SHhkC1dUI4ckUAocnvjponY5mtps1M8EUVQnZxYMRhs1XCp9jyPSne0xdq/qTQ09u+NAgDDIJ6N6wwhS6yKPciI9sJYonLELvgK0YXdJbVK7dlVtDEC1BGUSsa6SFAsXRyJtG1iEstM/bXjHCByqpDN4q3P1LbXRQH2xKNDOkauwPblT0grpbvkQ2/jf4mjX2aEpt9yERMLXAZIg== 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-SenderADCheck; bh=DFNoaE82fbwF1pLpierq5ugKy9VddWwueDEfMzm07Qc=; b=TVFbf1Y3uEHg5hNAKBVMULbZEgtn2/UHdSWBAZQg5WSaBMhpHprdMkNnY8RYcA6gKyOGPCqh+HKK/bVCkVE/HqG/2KpMmt2jMPZhdIyl2klY1HAzgl+0BDGEXgnwaW30X0r/8ywFgKfHTp0x2wlarh1AMJRbKmJoGWp/0+xElydjyYvkWzs34XGg32fS6+pswb7E2d73XzQpkQj6hyaLZyv7zoRfu6/VQCZENldsyuvcY4Me8sG5bpeht9ibRmICH+mtQSfKjrI7knI/sMraYYk4UCOM4eUkWTXHdxCkKYuu30798uCaK3FXfHNK6i7yKf3/gqYecUTAnVLUI4p2/g== ARC-Authentication-Results: i=1; mx.microsoft.com 1;spf=pass smtp.mailfrom=arm.com;dmarc=pass action=none header.from=arm.com;dkim=pass header.d=arm.com;arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=armh.onmicrosoft.com; s=selector2-armh-onmicrosoft-com; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=DFNoaE82fbwF1pLpierq5ugKy9VddWwueDEfMzm07Qc=; b=7LUZFP4Z7EFFGreUlxmsqBzKd137RlC0g9WbCpKTxrn6MM2SGKCOYXqvQIUEGGKOKbRAA01DgKHBU2Wt9Q3iEvqYhaB5Xt5tobV3fPSiAgosyrL4iH6DTXB9VMtyTx/CnW7Xr2O9jUnqaJfIInLoHtsgi+vQA1e+t8VGL1/jAso= Received: from AM4PR0802MB2307.eurprd08.prod.outlook.com (10.172.219.8) by AM4PR0802MB2226.eurprd08.prod.outlook.com (10.172.215.11) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.2136.15; Thu, 8 Aug 2019 16:30:02 +0000 Received: from AM4PR0802MB2307.eurprd08.prod.outlook.com ([fe80::e854:32de:1cad:f93a]) by AM4PR0802MB2307.eurprd08.prod.outlook.com ([fe80::e854:32de:1cad:f93a%9]) with mapi id 15.20.2157.015; Thu, 8 Aug 2019 16:30:01 +0000 From: Szabolcs Nagy To: Catalin Marinas , "linux-arm-kernel@lists.infradead.org" Subject: Re: [PATCH v7 1/2] arm64: Define Documentation/arm64/tagged-address-abi.rst Thread-Topic: [PATCH v7 1/2] arm64: Define Documentation/arm64/tagged-address-abi.rst Thread-Index: AQHVTThJtBlc8zHC8EmoKLcy3EHPqqbxcpmA Date: Thu, 8 Aug 2019 16:30:01 +0000 Message-ID: References: <20190807155321.9648-1-catalin.marinas@arm.com> <20190807155321.9648-2-catalin.marinas@arm.com> In-Reply-To: <20190807155321.9648-2-catalin.marinas@arm.com> Accept-Language: en-GB, en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: user-agent: Mozilla/5.0 (X11; Linux aarch64; rv:60.0) Gecko/20100101 Thunderbird/60.8.0 x-originating-ip: [217.140.106.55] x-clientproxiedby: LO2P265CA0151.GBRP265.PROD.OUTLOOK.COM (2603:10a6:600:9::19) To AM4PR0802MB2307.eurprd08.prod.outlook.com (2603:10a6:200:61::8) Authentication-Results-Original: spf=none (sender IP is ) smtp.mailfrom=Szabolcs.Nagy@arm.com; x-ms-exchange-messagesentrepresentingtype: 1 x-ms-publictraffictype: Email X-MS-Office365-Filtering-Correlation-Id: 631cd8e4-1bb3-47a8-47ea-08d71c1db0cc X-MS-Office365-Filtering-HT: Tenant X-Microsoft-Antispam-Untrusted: BCL:0; PCL:0; RULEID:(2390118)(7020095)(4652040)(8989299)(4534185)(4627221)(201703031133081)(201702281549075)(8990200)(5600148)(711020)(4605104)(1401327)(4618075)(2017052603328)(7193020); SRVR:AM4PR0802MB2226; X-MS-TrafficTypeDiagnostic: AM4PR0802MB2226:|HE1PR0802MB2602: X-Microsoft-Antispam-PRVS: x-checkrecipientrouted: true x-ms-oob-tlc-oobclassifiers: OLM:8882;OLM:8882; x-forefront-prvs: 012349AD1C X-Forefront-Antispam-Report-Untrusted: SFV:NSPM; SFS:(10009020)(979002)(4636009)(396003)(136003)(346002)(366004)(39860400002)(376002)(51444003)(199004)(189003)(31696002)(86362001)(66946007)(2616005)(486006)(476003)(76176011)(66476007)(4326008)(64126003)(81156014)(8936002)(66556008)(81166006)(64756008)(6486002)(8676002)(66446008)(44832011)(256004)(7736002)(71200400001)(305945005)(6436002)(71190400001)(229853002)(53936002)(6512007)(14454004)(2501003)(3846002)(6116002)(65826007)(99286004)(5660300002)(6246003)(25786009)(54906003)(316002)(58126008)(110136005)(446003)(2906002)(186003)(36756003)(26005)(53546011)(102836004)(478600001)(386003)(66066001)(65806001)(31686004)(6506007)(65956001)(11346002)(52116002)(969003)(989001)(999001)(1009001)(1019001); DIR:OUT; SFP:1101; SCL:1; SRVR:AM4PR0802MB2226; H:AM4PR0802MB2307.eurprd08.prod.outlook.com; FPR:; SPF:None; LANG:en; PTR:InfoNoRecords; A:1; MX:1; received-spf: None (protection.outlook.com: arm.com does not designate permitted sender hosts) X-MS-Exchange-SenderADCheck: 1 X-Microsoft-Antispam-Message-Info-Original: vHduti/4snOd9pz4x3iZLF0uY8tXP+GK0Vt+kjPorCd7n2gnQgGc9ZmDxgRejwcKBCoFpzNaJEPgSddy+R/D8lDeoZdmLvoPJk5sXI7vcB4mJ5f57h+czM98hZTiHd9ZpWvp9qyOFeeDJvn2JWgh8WwUKdIGFy8Rw+Z1taHHMmYb7LPSnvQy4GF0B7cscAUym9kpuOktqm3cdYkqMhVI5KSqW67XlRMM/Z6vuT648xazc21TDMLCnuL44ShDwbHPp6TF1yt4jvWw526CyCcZBCt8oe3GPKY71aVi1h2yTfhaVL/pClmcdPUGv8udPxgZx8TqEQgKSEbM9O20gvQ3hTvnuci4eF9kSiJ8+EKuMGcTfI2hiJ7NqRQfHrpFr7OG1qaWY59eoXOF/BZWIS1pD8iGXFtzU0TE/rvtrrSJJIY= Content-ID: <2416489F113EC049B7C1E80E7213516F@eurprd08.prod.outlook.com> MIME-Version: 1.0 X-MS-Exchange-Transport-CrossTenantHeadersStamped: AM4PR0802MB2226 Original-Authentication-Results: spf=none (sender IP is ) smtp.mailfrom=Szabolcs.Nagy@arm.com; X-EOPAttributedMessage: 0 X-MS-Exchange-Transport-CrossTenantHeadersStripped: DB5EUR03FT033.eop-EUR03.prod.protection.outlook.com X-Forefront-Antispam-Report: =?utf-8?B?Q0lQOjYzLjM1LjM1LjEyMztJUFY6Q0FMO1NDTDotMTtDVFJZOklFO0VGVjpO?= =?utf-8?B?TEk7U0ZWOk5TUE07U0ZTOigxMDAwOTAyMCkoOTc5MDAyKSg0NjM2MDA5KSgz?= =?utf-8?B?NzYwMDIpKDM0NjAwMikoMzk4NjA0MDAwMDIpKDEzNjAwMykoMzk2MDAzKSgy?= =?utf-8?B?OTgwMzAwMDAyKSgxODkwMDMpKDE5OTAwNCkoNTE0NDQwMDMpKDUzNTQ2MDEx?= =?utf-8?B?KSg2NTA2MDA3KSg0MzYwMDMpKDUwNDY2MDAyKSg2MjQ2MDAzKSg4OTM2MDAy?= =?utf-8?B?KSgzNTYwMDQpKDY1MTIwMDcpKDIyOTg1MzAwMikoMjU3ODYwMDkpKDEwNzg4?= =?utf-8?B?NjAwMykoNDMyNjAwOCkoNjQxMjYwMDMpKDMxNjAwMikoODYzNjIwMDEpKDEx?= =?utf-8?B?MDEzNjAwNSkoNTQ5MDYwMDMpKDI2ODI2MDAzKSg0Nzg2MDAwMDEpKDQ4NjAw?= =?utf-8?B?NikoODExNjYwMDYpKDQ0NjAwMykoMTEzNDYwMDIpKDY0ODYwMDIpKDQ3NjAw?= =?utf-8?B?MykoODExNTYwMTQpKDU4MTI2MDA4KSgxMjYwMDIpKDI2MTYwMDUpKDMxNjk2?= =?utf-8?B?MDAyKSgzNjc1NjAwMykoMjkwNjAwMikoNzYxNzYwMTEpKDYzMzcwNDAwMDAx?= =?utf-8?B?KSg0Nzc3NjAwMykoMjUwMTAwMykoNjMzNTA0MDAwMDEpKDMzNjAxMikoNjU4?= =?utf-8?B?MjYwMDcpKDYxMTYwMDIpKDIyNzU2MDA2KSgyNjAwNSkoMTQ0NTQwMDQpKDg2?= =?utf-8?B?NzYwMDIpKDU2NjAzMDAwMDIpKDE4NjAwMykoMzg2MDAzKSgxMDI4MzYwMDQp?= =?utf-8?B?KDI0ODYwMDMpKDIzNjc2MDA0KSg5OTI4NjAwNCkoMzg0NjAwMikoNjU4MDYw?= =?utf-8?B?MDEpKDY1OTU2MDAxKSg2NjA2NjAwMSkoMzE2ODYwMDQpKDc2MTMwNDAwMDAx?= =?utf-8?B?KSg3MDIwNjAwNikoNzA1ODYwMDcpKDc3MzYwMDIpKDMwNTk0NTAwNSkoOTY5?= =?utf-8?B?MDAzKSg5ODkwMDEpKDk5OTAwMSkoMTAwOTAwMSkoMTAxOTAwMSk7RElSOk9V?= =?utf-8?B?VDtTRlA6MTEwMTtTQ0w6MTtTUlZSOkhFMVBSMDgwMk1CMjYwMjtIOjY0YWE3?= =?utf-8?B?ODA4LW91dGJvdW5kLTEubXRhLmdldGNoZWNrcmVjaXBpZW50LmNvbTtGUFI6?= =?utf-8?B?O1NQRjpUZW1wRXJyb3I7TEFORzplbjtQVFI6ZWMyLTYzLTM1LTM1LTEyMy5l?= =?utf-8?Q?u-west-1.compute.amazonaws.com;MX:1;A:1;?= X-MS-Office365-Filtering-Correlation-Id-Prvs: bd58a293-aa05-4b53-ddea-08d71c1da909 X-Microsoft-Antispam: BCL:0; PCL:0; RULEID:(2390118)(7020095)(4652040)(8989299)(4534185)(4627221)(201703031133081)(201702281549075)(8990200)(5600148)(710020)(711020)(4605104)(1401327)(2017052603328)(7193020); SRVR:HE1PR0802MB2602; NoDisclaimer: True X-Forefront-PRVS: 012349AD1C X-Microsoft-Antispam-Message-Info: jVlJulB3PECAJcWwm8SbhL/jj72r+YBYmMWjyIADH4qG4mTKE/tYNwJSaru2YpGj8DdzCltVgBxKhz4ppYO3yu+moOfaBsWFrfJ+8EKyJNjB3fuBCkWh10f8otgFSWZwLFTxOlcuratJvGp8Vz9wxzOpaV6hvnswvEvS772BGRlIlmWi916nlpeSJrMGLnUgM/ugeaj0Z7uGUQLT1SIWsweatoKGbtg4hoFnzNg6VYbFl4owu22Fwae+SJ7rIdKz73frCI1oYq+B1UwSgPndpdLmXMrMtRnAPWHOC3sL4MuFWLFjQH149MXuibbOTcEiLZ3E+jhdvftM5TUiNZl6zten1ReAtaBGxCHG8aG6RiMb1uII/sfqcdS1gDypPW2RecRx1NVTdknjvQkM4GWSyxhN7sw26RLctG61HRC0WUU= X-OriginatorOrg: arm.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 08 Aug 2019 16:30:14.1461 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 631cd8e4-1bb3-47a8-47ea-08d71c1db0cc X-MS-Exchange-CrossTenant-Id: f34e5979-57d9-4aaa-ad4d-b122a662184d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=f34e5979-57d9-4aaa-ad4d-b122a662184d; Ip=[63.35.35.123]; Helo=[64aa7808-outbound-1.mta.getcheckrecipient.com] X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: HE1PR0802MB2602 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190808_093019_435486_A5A62D08 X-CRM114-Status: GOOD ( 11.20 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: "linux-arch@vger.kernel.org" , Vincenzo Frascino , "linux-doc@vger.kernel.org" , Andrey Konovalov , Kevin Brodsky , Will Deacon , Dave Hansen , nd Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org On 07/08/2019 16:53, Catalin Marinas wrote: > From: Vincenzo Frascino > > On arm64 the TCR_EL1.TBI0 bit has been always enabled hence > the userspace (EL0) is allowed to set a non-zero value in the > top byte but the resulting pointers are not allowed at the > user-kernel syscall ABI boundary. > > With the relaxed ABI proposed through this document, it is now possible > to pass tagged pointers to the syscalls, when these pointers are in > memory ranges obtained by an anonymous (MAP_ANONYMOUS) mmap(). description needs to be updated not to restrict tags to anon mmap. > +3. AArch64 Tagged Address ABI Exceptions > +----------------------------------------- > + > +The behaviour described in section 2, with particular reference to the > +acceptance by the syscalls of any valid tagged pointer, is not applicable > +to the following cases: > + > +- mmap() addr parameter. > + > +- mremap() new_address parameter. > + > +- prctl(PR_SET_MM, ``*``, ...) other than arg2 PR_SET_MM_MAP and > + PR_SET_MM_MAP_SIZE. > + > +- prctl(PR_SET_MM, PR_SET_MM_MAP{,_SIZE}, ...) struct prctl_mm_map fields. > + > +Any attempt to use non-zero tagged pointers will lead to undefined > +behaviour. i think that brk may be affected too by whatever that's causing problems in mmap. otherwise the text looks good to me. _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel