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=-6.0 required=3.0 tests=DKIMWL_WL_MED,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_PASS,USER_AGENT_NEOMUTT autolearn=unavailable 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 EBE64C43381 for ; Wed, 6 Mar 2019 17:13:05 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B397720684 for ; Wed, 6 Mar 2019 17:13:05 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=wavesemi.onmicrosoft.com header.i=@wavesemi.onmicrosoft.com header.b="SCNXtahL" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730427AbfCFRNE (ORCPT ); Wed, 6 Mar 2019 12:13:04 -0500 Received: from mail-eopbgr810109.outbound.protection.outlook.com ([40.107.81.109]:14648 "EHLO NAM01-BY2-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726491AbfCFRND (ORCPT ); Wed, 6 Mar 2019 12:13:03 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=wavesemi.onmicrosoft.com; s=selector1-wavecomp-com; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=fcrIwh5FAS/p9ZnN5P/05g+4grW/DAzlhzsDUfqXcHs=; b=SCNXtahLLKEaqGDYdpx0420+UtlkuOktGW+vyeSD+fqyhg4Sv4ERsXLNSQU++8mQ0ZTPe5DKX6VXnFj8tvewBVoUzvGUNBKxGe+ey8fA/ddcq8s9QWSv+/fXWpmVakVthkpxSYVfSSys9sePXXVe3tgTcE+swKqs3wzkvPNQynI= Received: from MWHPR2201MB1277.namprd22.prod.outlook.com (10.174.162.17) by MWHPR2201MB1261.namprd22.prod.outlook.com (10.174.162.13) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.1686.18; Wed, 6 Mar 2019 17:12:59 +0000 Received: from MWHPR2201MB1277.namprd22.prod.outlook.com ([fe80::b8d4:8f0d:d6d1:4018]) by MWHPR2201MB1277.namprd22.prod.outlook.com ([fe80::b8d4:8f0d:d6d1:4018%3]) with mapi id 15.20.1665.020; Wed, 6 Mar 2019 17:12:59 +0000 From: Paul Burton To: Steven Price CC: "linux-mm@kvack.org" , Andy Lutomirski , Ard Biesheuvel , Arnd Bergmann , Borislav Petkov , Catalin Marinas , Dave Hansen , Ingo Molnar , James Morse , =?iso-8859-1?Q?J=E9r=F4me_Glisse?= , Peter Zijlstra , Thomas Gleixner , Will Deacon , "x86@kernel.org" , "H. 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received-spf: None (protection.outlook.com: wavecomp.com does not designate permitted sender hosts) x-ms-exchange-senderadcheck: 1 x-microsoft-antispam-message-info: 8jt+BVppR0Vb816sAwTQVXEmfvJS8UX31/SIqi1LS8KwFNkItVuCccfF40InI0eRNBWGPv4swBJNshjxVoEHQDtGOhX4G0gYAROsy2nSssGrX0I/H4rvl+k04FCexW7PH+XVAZrTrYx5zp2SU2tW8MV3OqmBi9JGJDspSzC9k07uBg29cRCsH4iIECei9wRmxnl5D8gNdgcTJ8RFoI6YlHn1HQnsyfrHOZ4fUVQVt54hpD5JinFs3+D1Qmcd7f/uof7VU4fuYb0huPdKZFA8mZ/7KoxDYqqHRZ0bkvNvoupdOh51suwpeuVB7f+WzU3BbSMHuvhpHQM+QH4U7M0nZF5zXeDISYdiEnaKx410DahMzD+I4P3X/lE4krQssIstG19tQuYolI0vTraKLrnkQb6JJ9BeQ94tBl0AcetVoAs= Content-Type: text/plain; charset="iso-8859-1" Content-ID: <166FB649BE7A0943BDD8181B357816BB@namprd22.prod.outlook.com> Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: mips.com X-MS-Exchange-CrossTenant-Network-Message-Id: 49a42e8a-b36c-444c-b2f5-08d6a256fb2e X-MS-Exchange-CrossTenant-originalarrivaltime: 06 Mar 2019 17:12:58.7825 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 463607d3-1db3-40a0-8a29-970c56230104 X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-Transport-CrossTenantHeadersStamped: MWHPR2201MB1261 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Steven, On Wed, Mar 06, 2019 at 03:50:15PM +0000, Steven Price wrote: > walk_page_range() is going to be allowed to walk page tables other than > those of user space. For this it needs to know when it has reached a > 'leaf' entry in the page tables. This information is provided by the > p?d_large() functions/macros. >=20 > For mips, we only support large pages on 64 bit. >=20 > For 64 bit if _PAGE_HUGE is defined we can simply look for it. When not > defined we can be confident that there are no large pages in existence > and fall back on the generic implementation (added in a later patch) > which returns 0. >=20 > CC: Ralf Baechle > CC: Paul Burton > CC: James Hogan > CC: linux-mips@vger.kernel.org > Signed-off-by: Steven Price Acked-by: Paul Burton Thanks, Paul