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[104.47.40.124]) by mx.google.com with ESMTPS id 20-v6si15462185pfr.242.2018.09.02.06.14.42 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Sun, 02 Sep 2018 06:14:42 -0700 (PDT) Received-SPF: pass (google.com: domain of alexander.levin@microsoft.com designates 104.47.40.124 as permitted sender) client-ip=104.47.40.124; Authentication-Results: mx.google.com; dkim=pass header.i=@microsoft.com header.s=selector1 header.b=S12ECErs; spf=pass (google.com: domain of alexander.levin@microsoft.com designates 104.47.40.124 as permitted sender) smtp.mailfrom=Alexander.Levin@microsoft.com; dmarc=pass (p=REJECT sp=REJECT dis=NONE) header.from=microsoft.com DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=selector1; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=t4Jpeb0gzWv2R9mSjIe9NpHEUtUfLG1UOd39OIQw62I=; b=S12ECErsK/wxPyww2OHLKEgp/4gCWLf6o5Ej8jAXAXRusmb6p7P+vvsdR+0u75yNQ7vW85l//hOCuCjN59eqX0afq5pugW3O83y0Lcdj5eyd6gpdVwlsjHRYSWA9WrckgLCVXVeZi9CwRr5NBryzIQuTT6NPb9aAtlfdSoT9X4c= Received: from CY4PR21MB0776.namprd21.prod.outlook.com (10.173.192.22) by CY4PR21MB0120.namprd21.prod.outlook.com (10.173.189.14) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.1122.2; Sun, 2 Sep 2018 13:14:36 +0000 Received: from CY4PR21MB0776.namprd21.prod.outlook.com ([fe80::7c3a:eea8:1391:1611]) by CY4PR21MB0776.namprd21.prod.outlook.com ([fe80::7c3a:eea8:1391:1611%7]) with mapi id 15.20.1143.000; Sun, 2 Sep 2018 13:14:36 +0000 From: Sasha Levin To: "stable@vger.kernel.org" , "linux-kernel@vger.kernel.org" CC: Joerg Roedel , Thomas Gleixner , "H . Peter Anvin" , "linux-mm@kvack.org" , Linus Torvalds , Andy Lutomirski , Dave Hansen , Josh Poimboeuf , Juergen Gross , Peter Zijlstra , Borislav Petkov , Jiri Kosina , Boris Ostrovsky , Brian Gerst , David Laight , Denys Vlasenko , Eduardo Valentin , Greg KH , Will Deacon , "aliguori@amazon.com" , Daniel Gruss , "hughd@google.com" , "keescook@google.com" , Andrea Arcangeli , Waiman Long , Pavel Machek , Arnaldo Carvalho de Melo , Alexander Shishkin , Jiri Olsa , Namhyung Kim , "joro@8bytes.org" , Sasha Levin Subject: [PATCH AUTOSEL 4.9 27/62] x86/mm: Remove in_nmi() warning from vmalloc_fault() Thread-Topic: [PATCH AUTOSEL 4.9 27/62] x86/mm: Remove in_nmi() warning from vmalloc_fault() Thread-Index: AQHUQr7lLmtxHkt9MEK83cNsQ4AeYg== Date: Sun, 2 Sep 2018 13:14:36 +0000 Message-ID: <20180902131411.183978-17-alexander.levin@microsoft.com> References: <20180902131411.183978-1-alexander.levin@microsoft.com> In-Reply-To: <20180902131411.183978-1-alexander.levin@microsoft.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [52.168.54.252] x-ms-publictraffictype: Email x-microsoft-exchange-diagnostics: 1;CY4PR21MB0120;6:i3frfydjFOBbUPCgVwQK76OlAhJnxftOA61fCRIrnP6U31mhSIR7tzP4NqXgGG6djeHUnwAqJkp5WCkV3VbZlnKegbfAo8yniYWY2cbtkgFVKmTos9weihWtytVQhquKY7t+oDhs80ScnvI3CzKu7MwKmdo7yRE4GzXI5E7WtFVNIY9gUFf/98seJzcW8KX6+07BDtjUeJ8qk0WvAiCa6cOUNbPPTYST6GOkY/IPFBv0spL1IY8x9OsaJGdyoc1qeaoRNXowm1z9HBGwWhgDM8EbxdlTYOUTnprBKCWTNFP31rj2ipUbSx51eHLHiMlbJ2z0QYADtBz2PiNfPCXVSR1IiaBuoVM/72dtnPAwnTV/MT/gHmY8lM3V9qTNO5V2TvPpSV/oY/jD14IfLEa5bUdNfu9kdx3DJg+PPm6wKAO/8l2CVNdZhkUFZmCwaW7TR8SurOeCFTbgakBTVfSOjw==;5:Sf0eNZYx5IcxTbCN03vIKW9mPqmwgatLSj46R4L1rCwP+xb1wfW6ProVhHD6rLI/dcrmWzQ8iMO6TQwFh8LR+XEviwRGaj/gxywHCL1vhJt8X5cYr8Ue2ioKkTP9V1sbYgTYYf5jiQINGMwcH0GKpsuH2bYyIeYYucxaax9YsPE=;7:Oyn8UVoxfbAQElzrFU9uFofs/VUgFO8la5D8Q7sAkusBEfdGONNwyUEFnd/+ygZ4s1QMfan4KWDTKY7B9Xf777D+E8XG03KXRM++HnpQ6ndeshTLS27P8SwPqBEtjCbVtC0A64NQJvQm4mCcBKUrAXXqMDKzIpCBboRRmLMROWavaHJMLsxDIonhXP7fjJmDq5sljfpH6KdaXxJKnhOtyn2GMSuscuIlO9YOslu2O5zU2z4XqOp8PucPSF6UsuH/ x-ms-office365-filtering-correlation-id: 00acbe20-707a-4fcb-6f7b-08d610d60807 x-ms-office365-filtering-ht: Tenant x-microsoft-antispam: BCL:0;PCL:0;RULEID:(7020095)(4652040)(4534165)(4627221)(201703031133081)(201702281549075)(5600074)(711020)(4618075)(2017052603328)(7193020);SRVR:CY4PR21MB0120; 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received-spf: None (protection.outlook.com: microsoft.com does not designate permitted sender hosts) x-microsoft-antispam-message-info: lv0usn5yrUSy5/MrQyDsNPmWVpcrozKUmLUs8qDDwuu/q9p5fHQJUD9lMs/30hlvKvjDNLMn8LGi7HfH+vR2/yvP7zl3rif5EaAIiUwCh1vdxvqP6q0NJMZpe8pP1djR0cU7qad6379h4zxlZn8auj5t8ghmcZArYZeFUT692PKw081eQjuj7NS92s5wEIwN6lyAnVdq25WQG/6mrNtvGGzrf51gaCqe4rG6IalscUup/N8fficxOW/DF3QW6Yk0TOtjPDUhAdR4ff9t4USpGnWUQKBph/ohpC9U6xEbGq0UumBu+L3owN0uSwA8C0qVgA8DfeQXp+jACSpJgH4KQLM6aSHBxS3d4GvUUXRwGxo= spamdiagnosticoutput: 1:99 spamdiagnosticmetadata: NSPM MIME-Version: 1.0 X-OriginatorOrg: microsoft.com X-MS-Exchange-CrossTenant-Network-Message-Id: 00acbe20-707a-4fcb-6f7b-08d610d60807 X-MS-Exchange-CrossTenant-originalarrivaltime: 02 Sep 2018 13:14:36.0182 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 72f988bf-86f1-41af-91ab-2d7cd011db47 X-MS-Exchange-Transport-CrossTenantHeadersStamped: CY4PR21MB0120 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: X-Virus-Scanned: ClamAV using ClamSMTP From: Joerg Roedel [ Upstream commit 6863ea0cda8725072522cd78bda332d9a0b73150 ] It is perfectly okay to take page-faults, especially on the vmalloc area while executing an NMI handler. Remove the warning. Signed-off-by: Joerg Roedel Signed-off-by: Thomas Gleixner Tested-by: David H. Gutteridge Cc: "H . Peter Anvin" Cc: linux-mm@kvack.org Cc: Linus Torvalds Cc: Andy Lutomirski Cc: Dave Hansen Cc: Josh Poimboeuf Cc: Juergen Gross Cc: Peter Zijlstra Cc: Borislav Petkov Cc: Jiri Kosina Cc: Boris Ostrovsky Cc: Brian Gerst Cc: David Laight Cc: Denys Vlasenko Cc: Eduardo Valentin Cc: Greg KH Cc: Will Deacon Cc: aliguori@amazon.com Cc: daniel.gruss@iaik.tugraz.at Cc: hughd@google.com Cc: keescook@google.com Cc: Andrea Arcangeli Cc: Waiman Long Cc: Pavel Machek Cc: Arnaldo Carvalho de Melo Cc: Alexander Shishkin Cc: Jiri Olsa Cc: Namhyung Kim Cc: joro@8bytes.org Link: https://lkml.kernel.org/r/1532533683-5988-2-git-send-email-joro@8bytes.org Signed-off-by: Sasha Levin --- arch/x86/mm/fault.c | 2 -- 1 file changed, 2 deletions(-) diff --git a/arch/x86/mm/fault.c b/arch/x86/mm/fault.c index acef3c6a32a2..5c419b8f99a0 100644 --- a/arch/x86/mm/fault.c +++ b/arch/x86/mm/fault.c @@ -330,8 +330,6 @@ static noinline int vmalloc_fault(unsigned long address) if (!(address >= VMALLOC_START && address < VMALLOC_END)) return -1; - WARN_ON_ONCE(in_nmi()); - /* * Synchronize this task's top level page-table * with the 'reference' page table.