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 92519C7115C for ; Mon, 16 Jun 2025 11:58:59 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id D0A416B008C; Mon, 16 Jun 2025 07:58:58 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id CE2506B0093; Mon, 16 Jun 2025 07:58:58 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id A51386B008C; Mon, 16 Jun 2025 07:58:58 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0014.hostedemail.com [216.40.44.14]) by kanga.kvack.org (Postfix) with ESMTP id 8FBAB6B008C for ; Mon, 16 Jun 2025 07:58:58 -0400 (EDT) Received: from smtpin30.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay09.hostedemail.com (Postfix) with ESMTP id 07D4F811D7 for ; Mon, 16 Jun 2025 11:58:58 +0000 (UTC) X-FDA: 83561117556.30.6E3A218 Received: from NAM10-MW2-obe.outbound.protection.outlook.com (mail-mw2nam10on2044.outbound.protection.outlook.com [40.107.94.44]) by imf23.hostedemail.com (Postfix) with ESMTP id 27A8614000B for ; Mon, 16 Jun 2025 11:58:54 +0000 (UTC) Authentication-Results: imf23.hostedemail.com; dkim=pass header.d=Nvidia.com header.s=selector2 header.b=FGoRjAhp; arc=pass ("microsoft.com:s=arcselector10001:i=1"); spf=pass (imf23.hostedemail.com: domain of apopple@nvidia.com designates 40.107.94.44 as permitted sender) smtp.mailfrom=apopple@nvidia.com; dmarc=pass (policy=reject) header.from=nvidia.com ARC-Message-Signature: i=2; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1750075135; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=xU2G7ddnCtGYyvj2LJL7rTaQSlp2LMe82jG8vbhabiI=; b=33Wk3+2pYeQ1FiLwt9lGx17E/TxAIlCLpd391nVJWLIAnSlulXN0omV2VApWGMvv/kqii9 1x6HvS05s8B4MookZdzp9EPih2fHrzhBkvrJvFKTiERiFdyBEldLNsYRGDavL2KxKmcjto n6tfPdQsLejVIPG/kotzeoz6pvdmKMI= ARC-Seal: i=2; s=arc-20220608; d=hostedemail.com; t=1750075135; a=rsa-sha256; cv=pass; b=MDeVRFpuapF+RaPXzxrMcrcwDc6eNXSD59pFd4u5lZ9pmRyN0MSHWVRGsVmOexu/EqlPXs 8CnMAA9BecXhL6T+PN2HNm2K0ogIrbOdXhmbSKh4M3g6xYEHKiQPTCiwn6jbPdleMzXGJc /j0dlTtr8qVEZmqFJEGW+zF7G6g2myQ= ARC-Authentication-Results: i=2; imf23.hostedemail.com; dkim=pass header.d=Nvidia.com header.s=selector2 header.b=FGoRjAhp; arc=pass ("microsoft.com:s=arcselector10001:i=1"); spf=pass (imf23.hostedemail.com: domain of apopple@nvidia.com designates 40.107.94.44 as permitted sender) smtp.mailfrom=apopple@nvidia.com; dmarc=pass (policy=reject) header.from=nvidia.com ARC-Seal: i=1; a=rsa-sha256; s=arcselector10001; d=microsoft.com; cv=none; b=pXNKV3s5S3xqoQa/O8d/b4zrKNUiPcZ3quzyQNalYOFQyyiFkyBpEXNheZUJ4/b2AMyDFVVoz1cS+Ip5DXYj2PeaCiEES3pXIwUpK8RjK3dEV7hrNq5uFtKxc/6p2RBmCdMecki7POisU5s6cZ1Qu6Pd24Hb8QBGhpIzxYSoNcmwUnkzVgxqYMHmMQo4JmXPQgCLyXAwoETWcYnfaOc6ZjP7YGB+VINKsEXXaoliaCfStCjUAxR78MHoTdVlbgGUykk0jPB+InGPWRzDxx8x9YrKVo0L8R2GmzfoI5wLRWopyC0dArgwsTUqSrT5dlEzZI8EW9GuKHKjnXjEtkLxVg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector10001; 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=xU2G7ddnCtGYyvj2LJL7rTaQSlp2LMe82jG8vbhabiI=; b=a5mAYPN+4lEKTqRFr9RI/33uhDnNgqE4kr1B5zUgfidrEzCb4VU+TyfqQXQQuxGELkJXhopR99LXouP4eZIMzQZGjNDPv/u9WTzfMRPk3JRrNlfH/srSMQTadp2TDuMBs6bwF6ueN3UVm7HHyN7V0lD5z5VsATH/T47NAOyQAnTfJqL8MKEF1lookTIfoZYac7u29yA68sxT/irD8TaRu/cA4iPeYqvyJ4Sd16iF3qV0TpJ/ah1ObchphY6tEo70qQVMj/wAHw+oIumvZFjkC7DKcvYOH41etMvnhB2WIhdiXtvhPk5pwQ58HKTWVvj6aYK4es/yN49wLvPTJ8Zfxg== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=nvidia.com; dmarc=pass action=none header.from=nvidia.com; dkim=pass header.d=nvidia.com; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=Nvidia.com; s=selector2; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=xU2G7ddnCtGYyvj2LJL7rTaQSlp2LMe82jG8vbhabiI=; b=FGoRjAhpWLE3pQm/4xjmEzmie3yQhjCjJF79x04L+/QSWSw7ScfoOkqAWZl+df+sg7Wwta5N6V6eo789IUtnKvoBA9OUVleVajeIVD7V2N9NlX/kh551/LvULz+33TPkBX0VWxasVHu0a+lXVTffocfKwdFyYjr1fCBpR/1i26XTqvg6L3YmqexbqQdRd1XswRuh6HFmy28ioYlg7URqNfeOlYjcl3BuoRwApqePqT7bTXyFPUvCf8N+oE5N2WjU6ANBwCLDLh1d+74lkK0toOfMPZhE9YANNTH/a6Fb7c0TdK+qz6GeZrURvUALpv8DyuvcehLHoSx+hISWPAa7Cg== Received: from CY8PR12MB7705.namprd12.prod.outlook.com (2603:10b6:930:84::9) by CH2PR12MB9517.namprd12.prod.outlook.com (2603:10b6:610:27f::13) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.8835.29; Mon, 16 Jun 2025 11:58:46 +0000 Received: from CY8PR12MB7705.namprd12.prod.outlook.com ([fe80::4b06:5351:3db4:95f6]) by CY8PR12MB7705.namprd12.prod.outlook.com ([fe80::4b06:5351:3db4:95f6%5]) with mapi id 15.20.8835.026; Mon, 16 Jun 2025 11:58:46 +0000 From: Alistair Popple To: akpm@linux-foundation.org Cc: linux-mm@kvack.org, Alistair Popple , gerald.schaefer@linux.ibm.com, dan.j.williams@intel.com, jgg@ziepe.ca, willy@infradead.org, david@redhat.com, linux-kernel@vger.kernel.org, nvdimm@lists.linux.dev, linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, jhubbard@nvidia.com, hch@lst.de, zhang.lyra@gmail.com, debug@rivosinc.com, bjorn@kernel.org, balbirs@nvidia.com, lorenzo.stoakes@oracle.com, linux-arm-kernel@lists.infradead.org, loongarch@lists.linux.dev, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-cxl@vger.kernel.org, dri-devel@lists.freedesktop.org, John@Groves.net, m.szyprowski@samsung.com Subject: [PATCH v2 02/14] mm: Filter zone device pages returned from folio_walk_start() Date: Mon, 16 Jun 2025 21:58:04 +1000 Message-ID: <11dd5b70546ec67593a4bf79f087b113f15d6bb1.1750075065.git-series.apopple@nvidia.com> X-Mailer: git-send-email 2.47.2 In-Reply-To: References: Content-Transfer-Encoding: 8bit Content-Type: text/plain X-ClientProxiedBy: SYAPR01CA0005.ausprd01.prod.outlook.com (2603:10c6:1::17) To CY8PR12MB7705.namprd12.prod.outlook.com (2603:10b6:930:84::9) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CY8PR12MB7705:EE_|CH2PR12MB9517:EE_ X-MS-Office365-Filtering-Correlation-Id: 818c82d6-5320-42b4-5e86-08ddaccd25ac X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|7416014|376014|366016|1800799024; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?pmMJWBuf180ubdvrnXwY/M7y4OvNP3hwZmjOxIPBOFwI/LSU9F5wTHuwDyIT?= =?us-ascii?Q?Ch28eVXypoNYncxNHwVvVtIjJCXJXLzD8st0htVsve7kWlE5iKyLG1xIiScw?= =?us-ascii?Q?HieC+BlWYqg+Vhs7jtFuISi6nfjTK9W1VKNVmwhNXoUbJUmCiI18m83JH4Yi?= =?us-ascii?Q?99GsWaitG27s/8iIv0+b9+EOM/XPqSPHQs2MuWK7paQ9JOokHM36p1skD25Q?= =?us-ascii?Q?pz84R9/uiJT6AxlicUu5D6ofSt6VE8YSYiRe7WGgZifwGMNPjd7Y3xbGxtdY?= =?us-ascii?Q?qzTxvFQmb6/PMS/cXSH47wee4gTH00W28rkFKSXOLVR6eEm+rci1UMwNDENV?= =?us-ascii?Q?zRG9H1skZ8VTWzUdeMepAvNlnFfWzAgnsaSO28Qz/q/NZbpAJ0oWV1ptWfk9?= =?us-ascii?Q?mIlNPZWqak4xRQX3K/REcp0H8C9LGeENzo1AXpVBCMKTI9mt98B8T5IiS4yQ?= =?us-ascii?Q?tNYrRl5rs8PiWDI+X0AbLCxRCAiEnrt3UGB2vDa0wtTzDwYckjKunSFAN/mm?= =?us-ascii?Q?lRNo8bu6QntK4NXGURJCgeUonWsW2MadZuuqhsnvCcIdX1UorKtPTn1Xhtrq?= =?us-ascii?Q?oo5+sXVWqCAsEkglFpH6uN9VYgX5MkTRZ94E2j9mkTgfAnBrsSIWkyO9q+af?= =?us-ascii?Q?GxCJ/1+D71M16IduMpfhrPh/TVMyEdmJ+/yo/16qZH/AsmMzOxd2Hin0TeSj?= =?us-ascii?Q?Rjz/CW/MoNM2tXX0QnH7TH89gWE4d8rZHhTsJLJJ0UoxIDZToRsphnFVrv+K?= =?us-ascii?Q?t/H0LXClib6BlpzlV0YNj1OFMii/nu0RvLosvFcsixM+ETZ7Ad4goBpnuzon?= =?us-ascii?Q?yEGlZffqxWY1lfgpGcOF04BAPuFmpB+gnW4rDE996cozIHcwCVp2sLIVrMYr?= =?us-ascii?Q?GtB1raS84M+dDE+k2+QqLZf+ZV7ziOOXit5M0c6/j4VEheNzNClG7cgfUe7i?= =?us-ascii?Q?gfOVHoSkHD0X/2X2O3SnlVx5N5krNFUrINkidh/O5Mp++7Uqv7kCnYdJ3Uqn?= =?us-ascii?Q?fBfanz5TroRBnngjviMhr6yRZc7kM8LktEe4nq5jHVOp7AmV6ORqz4FsL4+U?= =?us-ascii?Q?+Q/6JuEnHmAVtktVcWssuh45pHQk3Esjb2vEuAK+j29tDkVtXufS5X0l197x?= =?us-ascii?Q?drTbigGzQisVZ6XP2qbYG5f7YH+c4qgby0R63yGU8iVS3m2I7kuQZQdLFG9C?= =?us-ascii?Q?YaDGAlEW+LLcmCqWZDajs6c7t2GXI4vfgAZyvsTmOF4fE+hmJWys3Vw1RP2m?= =?us-ascii?Q?zZzxiHfRuVHbLwEVuMQz/xb7tNT0IrkCu7L13bp+H3uniDUdYX8Pzjm8pYTd?= =?us-ascii?Q?04o+a/2Atob/83v7vwbR/MkQwUodsEJ7Fxtx35YSH4w4qrXmzHSgeMTr/rpt?= =?us-ascii?Q?guvveQZwhEHVW5RcvH7VZp+jImBoA2nW1mEKUOpL5mj9FKeS/dBu8ZLpBoqC?= =?us-ascii?Q?ZWg2Yg+Rm4g=3D?= X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:CY8PR12MB7705.namprd12.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230040)(7416014)(376014)(366016)(1800799024);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?us-ascii?Q?C2yT2VB1mEDpHVooO/MvEMC4m4DCKrVpzrfERDmtErqmJ0i3M7pisKJJYVVj?= =?us-ascii?Q?gJd7dfHGNus0opxlbXxIGv11hcNXggrOjQjTCoKcGNUfpB6IkGqycudYW2w8?= =?us-ascii?Q?S7C3wMumkm8PIDCI/oZ/ZjhzmKUnljF0HV/aTCOzqIZuvRyWrEeVm8T0PMzr?= =?us-ascii?Q?XejsBQh+q4EsmuZFUN9Cx7SQR1JS6+Uwj2TZvDEEl7U2VJf/m1te8YecERBy?= =?us-ascii?Q?tthC0fFFv+PB/U32hXi5IYXGsO7qy7WBnVKwpm5zMIE8W3Jr/XGJ4ZRhXRab?= =?us-ascii?Q?t8aXUQsPvjR9RdfqyzTw7oHF0VbMBRGtYj6NiiTnV5AKkvhGFpEeKHa+TgM5?= =?us-ascii?Q?hMrg2Ll/lmbUDkMXiEBbiIlwF5FezO96NPodJog3qy/AikRI9cFBOpRdbsCf?= =?us-ascii?Q?kSgJxjadCsxvbRS3amv51hpjNgt97jI/45OydVQOaJr95pmu4saF44vDsFbe?= =?us-ascii?Q?dwgE84CxoCxBVWYfMm5rQnUZ+3mQrRRB58b7Y+V2XYTBSIV4SuTuBJ0wl1Rb?= =?us-ascii?Q?QyTIexGjEQ+6tzBINWhmClDjYQbT099vBtLVXzuqmtVrzhjsQzLXuFv9Ag3l?= =?us-ascii?Q?KXxLsx7DOhNrh5tjiYTezOY9czozKV6mqK+Ri2n7tNuXXMlQEohyA6xjZOhE?= =?us-ascii?Q?yH4cw36BmB+UNdmNXQG48ZpR04kDpMwlkzDj+sEafiviciq0SEW9Ptay0PhB?= =?us-ascii?Q?txneeuFhW9zYq3vo+gBvg15a2IPWtoJ2zoF8YTBfbHWIYXmvTNMguevB0+bf?= =?us-ascii?Q?dCkDnFW5WwpZKeRKSWqYDIsyAmYDmlJnTbDHC9A6D3XmmWquFV5I9EPAO5v/?= =?us-ascii?Q?Iel6MS0fH41RqBDy73LGKygs9HPqFwfHXGSchC5swbi10ufln4II6+VR4GcZ?= =?us-ascii?Q?jgYdS0vdAs3LdX/LrJv23tvzHW3jrQHZ/u66yg1BkQI6SCRaQ1jzjou0sDSb?= =?us-ascii?Q?TtPl6lj0z0xskUx+3hhL8eQiUhvm+u2rbl6f/oONd8u4iOvUGUfe5JRaeVZr?= =?us-ascii?Q?D8bywgWSf4n4FAom1dSN1gd4ZldkAH9NLF0rwhI25fSwNuPMcnNaD47rF7CF?= =?us-ascii?Q?QmigLHbeBucJhs8/eIv95gkz4jiTysdzIERrQvDF+XEDM8vy31gaXIDCMayp?= =?us-ascii?Q?P0Y/kmt3uUSbgt4l9KLywKasllf2YEPHkes6n5CCbMI8ZzbWvfUQGEzame3h?= =?us-ascii?Q?RTZoYCucCMe7Q0k4Fhr59r3M0LQe+GIVGx/2pk+Ctw2BAX56l0Dn5XLO3449?= =?us-ascii?Q?mGVJBwkMvLMAQqt902boUFN3byS0m1kPYQk1YvamWeAg3oGzfbEJ9gqoOeBX?= =?us-ascii?Q?PcXSHF8iIs2GVR4IHdV5tCKRgu+kxA+ygJyyDXl6BfuWXCWgmGxP7GXETH31?= =?us-ascii?Q?IicXSEXAjWkvd/3bNgC164CyuG37LrRrcJOvVufaMOF3wxGdu5TOoXcM+5O/?= =?us-ascii?Q?TNzfNjFhHlkg2AQXDCDcVCmhVR4SNuL2jlXA+QNctLqorcrciiN+56AlEmQZ?= =?us-ascii?Q?FkoFcoUx4AbDp9uRZVjItO0PEzJekz46ihHGvjZzOUX8nbB2mihVC+Hjo9Wy?= =?us-ascii?Q?z6GUBboiaqXs7ysYPfCYEJdTPK9phcQ4W4W8UaU8?= X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-Network-Message-Id: 818c82d6-5320-42b4-5e86-08ddaccd25ac X-MS-Exchange-CrossTenant-AuthSource: CY8PR12MB7705.namprd12.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 16 Jun 2025 11:58:46.0428 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: GA8O847Pc9ZIPqldbpZriUyXUCHo/MOS5eSU/cNQpCF+Fu8Pm4yL9ZKGEMZdpsvL6F4t1cFs2J9KBIS1UGwnlA== X-MS-Exchange-Transport-CrossTenantHeadersStamped: CH2PR12MB9517 X-Rspam-User: X-Rspamd-Server: rspam11 X-Rspamd-Queue-Id: 27A8614000B X-Stat-Signature: 3tm1p6crbdtkqicga8wyhutgu1akp9jm X-HE-Tag: 1750075134-822086 X-HE-Meta: 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 09SKxb3A 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 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: List-Subscribe: List-Unsubscribe: Previously dax pages were skipped by the pagewalk code as pud_special() or vm_normal_page{_pmd}() would be false for DAX pages. Now that dax pages are refcounted normally that is no longer the case, so the pagewalk code will start returning them. Most callers already explicitly filter for DAX or zone device pages so don't need updating. However some don't, so add checks to those callers. Signed-off-by: Alistair Popple --- Changes since v1: - Dropped "mm/pagewalk: Skip dax pages in pagewalk" and replaced it with this new patch for v2 - As suggested by David and Jason we can filter the folios in the callers instead of doing it in folio_start_walk(). Most callers already do this (see below). I audited all callers of folio_walk_start() and found the following: mm/ksm.c: break_ksm() - doesn't need to filter zone_device pages because the can never be KSM pages. get_mergeable_page() - already filters out zone_device pages. scan_get_next_rmap_iterm() - already filters out zone_device_pages. mm/huge_memory.c: split_huge_pages_pid() - already checks for DAX with vma_not_suitable_for_thp_split() mm/rmap.c: make_device_exclusive() - only works on anonymous pages, although there'd be no issue with finding a DAX page even if support was extended to file-backed pages. mm/migrate.c: add_folio_for_migration() - already checks the vma with vma_migratable() do_pages_stat_array() - explicitly checks for zone_device folios kernel/event/uprobes.c: uprobe_write_opcode() - only works on anonymous pages, not sure if zone_device could ever work so add an explicit check arch/s390/mm/fault.c: do_secure_storage_access() - not sure so be conservative and add a check arch/s390/kernel/uv.c: make_hva_secure() - not sure so be conservative and add a check --- arch/s390/kernel/uv.c | 2 +- arch/s390/mm/fault.c | 2 +- kernel/events/uprobes.c | 2 +- 3 files changed, 3 insertions(+), 3 deletions(-) diff --git a/arch/s390/kernel/uv.c b/arch/s390/kernel/uv.c index b99478e..55aa280 100644 --- a/arch/s390/kernel/uv.c +++ b/arch/s390/kernel/uv.c @@ -424,7 +424,7 @@ int make_hva_secure(struct mm_struct *mm, unsigned long hva, struct uv_cb_header return -EFAULT; } folio = folio_walk_start(&fw, vma, hva, 0); - if (!folio) { + if (!folio || folio_is_zone_device(folio)) { mmap_read_unlock(mm); return -ENXIO; } diff --git a/arch/s390/mm/fault.c b/arch/s390/mm/fault.c index e1ad05b..df1a067 100644 --- a/arch/s390/mm/fault.c +++ b/arch/s390/mm/fault.c @@ -449,7 +449,7 @@ void do_secure_storage_access(struct pt_regs *regs) if (!vma) return handle_fault_error(regs, SEGV_MAPERR); folio = folio_walk_start(&fw, vma, addr, 0); - if (!folio) { + if (!folio || folio_is_zone_device(folio)) { mmap_read_unlock(mm); return; } diff --git a/kernel/events/uprobes.c b/kernel/events/uprobes.c index 8a601df..f774367 100644 --- a/kernel/events/uprobes.c +++ b/kernel/events/uprobes.c @@ -539,7 +539,7 @@ int uprobe_write_opcode(struct arch_uprobe *auprobe, struct vm_area_struct *vma, } ret = 0; - if (unlikely(!folio_test_anon(folio))) { + if (unlikely(!folio_test_anon(folio) || folio_is_zone_device(folio))) { VM_WARN_ON_ONCE(is_register); folio_put(folio); goto out; -- git-series 0.9.1