From patchwork Fri Jan 11 15:05:41 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Souptick Joarder X-Patchwork-Id: 10758181 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 1090C13BF for ; Fri, 11 Jan 2019 15:01:52 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id EFD332A0CC for ; Fri, 11 Jan 2019 15:01:51 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id ECECB2A049; Fri, 11 Jan 2019 15:01:51 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.0 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FROM,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 62CAA2A0D7 for ; Fri, 11 Jan 2019 15:01:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2390284AbfAKPBo (ORCPT ); Fri, 11 Jan 2019 10:01:44 -0500 Received: from mail-pf1-f196.google.com ([209.85.210.196]:40188 "EHLO mail-pf1-f196.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2389984AbfAKPBn (ORCPT ); Fri, 11 Jan 2019 10:01:43 -0500 Received: by mail-pf1-f196.google.com with SMTP id i12so7067378pfo.7; Fri, 11 Jan 2019 07:01:43 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=date:from:to:cc:subject:message-id:mime-version:content-disposition :user-agent; bh=SrodQzZztcg8txHZaZFxducSgC9DqvYe1eV09xmVfQk=; b=RpzAMn/tFZO9w1bOsU0R3bl0Czqgh3vozKcpize0+4T5FcTI3eGHnL7a/siSocGNeS YpzDw/x5TPn/ZIK8D8rFRVnfSd+kRunfwlXMPBFnoy0agtIVT3l2o8n93yulfDdqPfpM 02pnJKSJtBrMnNoIKfIXvp+dl7xWo/ZINl/06zWYmqtI8R6Rd1tzw33GJStW9BWNcyJd UTxrdHPrzQA7Dgo9vXmzvN7LPm0x/n5eENgEHExKf5wRU3L1BPvidyksamluwHiEMfNj jLP1Epne1X0o4Fs5YlsShABd8w6xov+ORe//hxIum1KwYBI45AwbqyCzizyY7CZsappy j23Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:mime-version :content-disposition:user-agent; bh=SrodQzZztcg8txHZaZFxducSgC9DqvYe1eV09xmVfQk=; b=d2+qG4mTCgeTXqDyk8Cxjf0tGyVMvmHwgMOVkgQLrdFIE3N4QuLcU+D+hjEmYYra8m h6Nm8pWE5ITOmLknREiAgSesue7h/kCEX5I1b6E/M/bz21clMv+18mfFk0FXMITFZf/b TvMv05TdKL1Qz/DKSFyoMsu4el/1dXqLtX5jAdKXc5OfID486OiojEDm36nbn3Bxky3G gQS+GalWXbXEb2WRiCLh8ZSxnWLsnpELC4ItaFIivfidt7cL5ICwy3SJ3wu49akoE8nq KhYrQtj/EgpZ8xYLfZY6LC3VcOHCqGWKaimlfgCSRYGTFdWq+LFCxlgcAU5cyGJDGsgP /1yA== X-Gm-Message-State: AJcUukeD6H6zh7THqO3kLNuON1Qfnsg4HS8zw0l4iSTEasjXK3OCF+jT s05gNROLGhZNnGBnFpReV7D6bMw9 X-Google-Smtp-Source: ALg8bN63Mqumr33i923Eaojw1CNwJqGO3fUgNxuFX1Idnsn+2UvfCqyMDy2gA5SSe2/mxV+qUcpzvQ== X-Received: by 2002:a63:f30d:: with SMTP id l13mr13690215pgh.399.1547218901644; Fri, 11 Jan 2019 07:01:41 -0800 (PST) Received: from jordon-HP-15-Notebook-PC ([49.207.52.190]) by smtp.gmail.com with ESMTPSA id l70sm87429186pgd.20.2019.01.11.07.01.39 (version=TLS1 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Fri, 11 Jan 2019 07:01:40 -0800 (PST) Date: Fri, 11 Jan 2019 20:35:41 +0530 From: Souptick Joarder To: akpm@linux-foundation.org, willy@infradead.org, mhocko@suse.com, kirill.shutemov@linux.intel.com, vbabka@suse.cz, riel@surriel.com, sfr@canb.auug.org.au, rppt@linux.vnet.ibm.com, peterz@infradead.org, linux@armlinux.org.uk, robin.murphy@arm.com, iamjoonsoo.kim@lge.com, treding@nvidia.com, keescook@chromium.org, m.szyprowski@samsung.com, stefanr@s5r6.in-berlin.de, hjc@rock-chips.com, heiko@sntech.de, airlied@linux.ie, oleksandr_andrushchenko@epam.com, joro@8bytes.org, pawel@osciak.com, kyungmin.park@samsung.com, mchehab@kernel.org, boris.ostrovsky@oracle.com, jgross@suse.com Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-arm-kernel@lists.infradead.org, linux1394-devel@lists.sourceforge.net, dri-devel@lists.freedesktop.org, linux-rockchip@lists.infradead.org, xen-devel@lists.xen.org, iommu@lists.linux-foundation.org, linux-media@vger.kernel.org Subject: [PATCH 0/9] Use vm_insert_range and vm_insert_range_buggy Message-ID: <20190111150541.GA2670@jordon-HP-15-Notebook-PC> MIME-Version: 1.0 Content-Disposition: inline User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Previouly drivers have their own way of mapping range of kernel pages/memory into user vma and this was done by invoking vm_insert_page() within a loop. As this pattern is common across different drivers, it can be generalized by creating new functions and use it across the drivers. vm_insert_range() is the API which could be used to mapped kernel memory/pages in drivers which has considered vm_pgoff vm_insert_range_buggy() is the API which could be used to map range of kernel memory/pages in drivers which has not considered vm_pgoff. vm_pgoff is passed default as 0 for those drivers. We _could_ then at a later "fix" these drivers which are using vm_insert_range_buggy() to behave according to the normal vm_pgoff offsetting simply by removing the _buggy suffix on the function name and if that causes regressions, it gives us an easy way to revert. There is an existing bug in [7/9], where user passed length is not verified against object_count. For any value of length > object_count it will end up overrun page array which could lead to a potential bug. This is fixed as part of these conversion. Souptick Joarder (9): mm: Introduce new vm_insert_range and vm_insert_range_buggy API arch/arm/mm/dma-mapping.c: Convert to use vm_insert_range drivers/firewire/core-iso.c: Convert to use vm_insert_range_buggy drm/rockchip/rockchip_drm_gem.c: Convert to use vm_insert_range drm/xen/xen_drm_front_gem.c: Convert to use vm_insert_range iommu/dma-iommu.c: Convert to use vm_insert_range videobuf2/videobuf2-dma-sg.c: Convert to use vm_insert_range_buggy xen/gntdev.c: Convert to use vm_insert_range xen/privcmd-buf.c: Convert to use vm_insert_range_buggy arch/arm/mm/dma-mapping.c | 22 ++---- drivers/firewire/core-iso.c | 15 +---- drivers/gpu/drm/rockchip/rockchip_drm_gem.c | 17 +---- drivers/gpu/drm/xen/xen_drm_front_gem.c | 18 ++--- drivers/iommu/dma-iommu.c | 12 +--- drivers/media/common/videobuf2/videobuf2-dma-sg.c | 22 ++---- drivers/xen/gntdev.c | 16 ++--- drivers/xen/privcmd-buf.c | 8 +-- include/linux/mm.h | 4 ++ mm/memory.c | 81 +++++++++++++++++++++++ mm/nommu.c | 14 ++++ 11 files changed, 129 insertions(+), 100 deletions(-)