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=-3.0 required=3.0 tests=DKIMWL_WL_MED,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS, USER_AGENT_NEOMUTT autolearn=ham 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 91712C43381 for ; Fri, 1 Mar 2019 21:48:58 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 44E512083E for ; Fri, 1 Mar 2019 21:48:58 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=shutemov-name.20150623.gappssmtp.com header.i=@shutemov-name.20150623.gappssmtp.com header.b="do9XptRb" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 44E512083E Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=shutemov.name Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id EBA3E8E0003; Fri, 1 Mar 2019 16:48:57 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id E6AA98E0001; Fri, 1 Mar 2019 16:48:57 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id D80918E0003; Fri, 1 Mar 2019 16:48:57 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from mail-pf1-f200.google.com (mail-pf1-f200.google.com [209.85.210.200]) by kanga.kvack.org (Postfix) with ESMTP id 97A2F8E0001 for ; Fri, 1 Mar 2019 16:48:57 -0500 (EST) Received: by mail-pf1-f200.google.com with SMTP id f18so18403711pfd.1 for ; Fri, 01 Mar 2019 13:48:57 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:dkim-signature:date:from:to:cc:subject :message-id:references:mime-version:content-disposition:in-reply-to :user-agent; bh=vMUpOerzimh7H/ZPQ+1fel3zw8mp4Atm+/r0u+Z/foA=; b=e/us+NC0yNhRNi702ZSLtVHRhmO/Q9xUkWB5Ly2c0d4k8dGTT8BAsGKuUf1rdaiIrU JpjyhgvmSt00TJOTirszdp2Q1YxnPRrFTFCQRWVF/zlJnJv1MntS8WmFmn7zcPKf4L79 Ne8HhC9hqxo44FN7CjUTtfadXJQHZMuO1xgEbz82RVF8ZBqkKvykL/3Vq9g1vs3mSrJV aO/xQNFIwtfbjHpj0NoaI/9Nncwh2PUll7305f0N7uYmnIKhH6d8qCteFUjOlOKvfpYW cLGXWlVZbZ5S0pDX8cjMH8wKvm19ERpXnDTkIIbr2eQyqI5pl/VJtEcVgvG4AcXLQeA1 2hLA== X-Gm-Message-State: APjAAAXDGaIrotwGyVi+7tIPPtu2J22dIGKDbLvWobZGKDTk4hFnU+O3 PGj0CE3xAmpagCyGznSvXUCv7r0qB9SsKdUSTRgJgo0TaaJ6K+KQOQGgrUoT8qz2q8IwLyFhh/P wN2lyg4CApXBqWNS7E9/2sR2inPQLEf74A1+tCB+dntNIszK1NQONuXaBeyWFcq1bh/nwwDuYzE 3g1LLkMrCukm12Oe3r+ceaGuzlNZNHNqxC2a+tIfwfrhgSnTZm6/W68NLKysXFPdSQ5dV7ug5qh lAgAIAU/+a1iRbvKo952L42uVsWr1nMo6TcrLtGb3g90bqRezlkzdnaDizbA0bAbx9V+R64aWnb ilmlf34OtgSJaxS7TT1o0WKD71ZKI5xCzPcAwEozVgEeddnZJFH+U6ZMeqFnS+KxCQRZtS4diGB a X-Received: by 2002:a63:c204:: with SMTP id b4mr6902910pgd.335.1551476937307; Fri, 01 Mar 2019 13:48:57 -0800 (PST) X-Received: by 2002:a63:c204:: with SMTP id b4mr6902866pgd.335.1551476936515; Fri, 01 Mar 2019 13:48:56 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1551476936; cv=none; d=google.com; s=arc-20160816; b=cQDousip4maILkfHjuiKblzVP+pBmz1cZq0GLbSMf0VRd1xoIog2ko1ijR5xZWP60n 1EU4om8antkZkDu7XNxswB8A0ODDKFZFO+aPApwCKPzPFyg/5HvzlCfIvlZsLCFyNGO0 B3A+KYVxyRumdrM3Q/193DvSjIwM5PD+ZV1ttUEbhbgOb3LgZmJ1GLDA/JfOgGG8kcqK 1/MfZN4zl+UVwajeP8QZbrPHB4R9z8Dg90ICctgR9b5pKXkln5a2Bd7KEGlRn48yqFfg UW1Lu0WD5OqXcs1QhyfDho418MCKcR/7hQj9QLa5DC2Nk4KDnSQeHUlcLgSCjXnU/Rz2 qPUA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=user-agent:in-reply-to:content-disposition:mime-version:references :message-id:subject:cc:to:from:date:dkim-signature; bh=vMUpOerzimh7H/ZPQ+1fel3zw8mp4Atm+/r0u+Z/foA=; b=xax/K+iNaUxpCrlRd407bIj4zDHcd8X2WXnZI5SogQ5u7ID2dx9Ttn9ZhNlMv0PNLD ZlMdOWOLW2sntgJvEkuXvgj42qkZQ4HigTz/chZsaTh9ciQVMgKH2E6rw9gKW1YCyYD8 lKQg7CcrIPHebpRHZBXB/jm7uoMnniJQzBrVOml8ohgPEP7Sxez3ji3sP/0KQIC7F4vQ eCcTXBV/dwi0F/hqpcJ8KWjXPe+nznwdQZN34KUmE3LlCd468RAH12X150t8R0/9g/jN n6QWO2Gi7qXCqu4dkV3fpj+86V1TL1GLUXZZCXw5m5jCGo+wqhyUjZzuELq7TnOvI/Cy 2IMQ== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@shutemov-name.20150623.gappssmtp.com header.s=20150623 header.b=do9XptRb; spf=neutral (google.com: 209.85.220.65 is neither permitted nor denied by best guess record for domain of kirill@shutemov.name) smtp.mailfrom=kirill@shutemov.name Received: from mail-sor-f65.google.com (mail-sor-f65.google.com. [209.85.220.65]) by mx.google.com with SMTPS id be3sor34493920plb.25.2019.03.01.13.48.56 for (Google Transport Security); Fri, 01 Mar 2019 13:48:56 -0800 (PST) Received-SPF: neutral (google.com: 209.85.220.65 is neither permitted nor denied by best guess record for domain of kirill@shutemov.name) client-ip=209.85.220.65; Authentication-Results: mx.google.com; dkim=pass header.i=@shutemov-name.20150623.gappssmtp.com header.s=20150623 header.b=do9XptRb; spf=neutral (google.com: 209.85.220.65 is neither permitted nor denied by best guess record for domain of kirill@shutemov.name) smtp.mailfrom=kirill@shutemov.name DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=shutemov-name.20150623.gappssmtp.com; s=20150623; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to:user-agent; bh=vMUpOerzimh7H/ZPQ+1fel3zw8mp4Atm+/r0u+Z/foA=; b=do9XptRbUwmwOJ3TNHNpY7KbSRtzGbGiAA33/7Hv1NxUsNU78SH63CuZevLDRyJ/L8 knvcsZg82jPJQe8lRj8nhiuBnN3x//VBi/vZqNhmINjvFG434tEWr3skViQU3GOMnXOE icjaf/5gZwATMlgbtZt42vLGlXZ7XwyOWGzO2EMcmVkvSkbK8C0fFf+BQC6NHlpfyHnV M8uXTnLkroLn0Tg4TvhqHc3lXzfbVckhBiLRjNCnTBOCYqr803EfjmoxG/telV7wwSzz 8+lnnSz3pyJB2cuyYR1oHmgV/URTcruOp8IrEWqtU5CpoBeyNR+WW3ylkA9wPl7Xk7mo lYog== X-Google-Smtp-Source: APXvYqzPzAwmBTBYphssJHL3LTRyrhCSKJni1K7CY95rVxxRffbrHWIoSLpljCZS1fuiXLzqGmQj6g== X-Received: by 2002:a17:902:7e46:: with SMTP id a6mr7768122pln.150.1551476936266; Fri, 01 Mar 2019 13:48:56 -0800 (PST) Received: from kshutemo-mobl1.localdomain ([192.55.54.43]) by smtp.gmail.com with ESMTPSA id l72sm28226444pge.39.2019.03.01.13.48.54 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Fri, 01 Mar 2019 13:48:55 -0800 (PST) Received: by kshutemo-mobl1.localdomain (Postfix, from userid 1000) id F3EE43007CA; Sat, 2 Mar 2019 00:48:51 +0300 (+03) Date: Sat, 2 Mar 2019 00:48:51 +0300 From: "Kirill A. Shutemov" To: Steven Price Cc: linux-mm@kvack.org, Andy Lutomirski , Ard Biesheuvel , Arnd Bergmann , Borislav Petkov , Catalin Marinas , Dave Hansen , Ingo Molnar , James Morse , =?utf-8?B?SsOpcsO0bWU=?= Glisse , Peter Zijlstra , Thomas Gleixner , Will Deacon , x86@kernel.org, "H. Peter Anvin" , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Mark Rutland , "Liang, Kan" , Mark Salter , Aurelien Jacquiot , linux-c6x-dev@linux-c6x.org Subject: Re: [PATCH v3 05/34] c6x: mm: Add p?d_large() definitions Message-ID: <20190301214851.ucems2icwt64iabx@kshutemo-mobl1> References: <20190227170608.27963-1-steven.price@arm.com> <20190227170608.27963-6-steven.price@arm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20190227170608.27963-6-steven.price@arm.com> User-Agent: NeoMutt/20180716 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: On Wed, Feb 27, 2019 at 05:05:39PM +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. > > For c6x there's no MMU so there's never a large page, so just add stubs. Other option would be to provide the stubs via generic headers form !MMU. -- Kirill A. Shutemov