From patchwork Mon May 3 19:15:08 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Daniel Vetter X-Patchwork-Id: 12236851 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=-20.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, INCLUDES_PULL_REQUEST,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED 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 607C7C433ED for ; Mon, 3 May 2021 19:15:18 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 34918613B3 for ; Mon, 3 May 2021 19:15:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229660AbhECTQK (ORCPT ); Mon, 3 May 2021 15:16:10 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57838 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229657AbhECTQK (ORCPT ); Mon, 3 May 2021 15:16:10 -0400 Received: from mail-ed1-x52b.google.com (mail-ed1-x52b.google.com [IPv6:2a00:1450:4864:20::52b]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5233BC06138C for ; Mon, 3 May 2021 12:15:16 -0700 (PDT) Received: by mail-ed1-x52b.google.com with SMTP id g14so7605181edy.6 for ; Mon, 03 May 2021 12:15:16 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ffwll.ch; s=google; h=date:from:to:cc:subject:message-id:mail-followup-to:mime-version :content-disposition; bh=fyFJP735XQXj4LkTnGwzm4qSEE25PUlvsZ5m+5XoeTg=; b=R5TKedJKe8jFlf9lMHC2G4AqVWRJE0dTCT/4m3gzvsre1icWgKAlqnQ/n8OCP5qBu6 OD201KjlWSPNGB7YCWZ0BEgT0iiYzJnMY8R9kBq7QxnWO5Ec69yWP5imZDzfjfI87Icq Vu9mz6P83IjWi+hHed0zvq1mo7iSp7BFBiuFo= 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 :mail-followup-to:mime-version:content-disposition; bh=fyFJP735XQXj4LkTnGwzm4qSEE25PUlvsZ5m+5XoeTg=; b=J8x0qSlCN3ejQUOWW9DJEvNi334jhywJnoI4svvxZX8faGFxQEGOohCqj6RUD+BkaR 2b61LQaRw8gKmrminP7ySh/3plhApRFShnoUVmD1mQ9M48tDOV8+F8RHLgXb6q1O0U3w IDrSzY4VuAJIKRHWAH2Q3bNyQHDpFNBqDaGjGWEU0IlPqG1hZK8Wu8kfDDuFb6NppGa8 BaO8DrXpASb4v8CL4gy4xDqhXCjX2O4YOO2D0H+9KuHNJU+KWtKINZHKg2r81sRd9MZN 7t9vQVCmEEmBp8D96HUU/x8RwublOL+7ioIY5N+SAGN0lu3+J0Q9LQBeUIduAmwejyAC kLYQ== X-Gm-Message-State: AOAM530OFiVxEwG8N549jm2IigOXVaIg+tlyhxvDUJ4R527kqup4GnUP q6CeTh2YDqxUthxz78RrA3p3NxcSTB/a6Q== X-Google-Smtp-Source: ABdhPJwHjMUFJwM40ARD1fhW9cBMZs1N9ixtJyT4oagDjJlQdPziQznBELdraes2Gu2qzngLQrV4Pw== X-Received: by 2002:a05:6402:c8:: with SMTP id i8mr22275371edu.57.1620069315093; Mon, 03 May 2021 12:15:15 -0700 (PDT) Received: from phenom.ffwll.local ([2a02:168:57f4:0:efd0:b9e5:5ae6:c2fa]) by smtp.gmail.com with ESMTPSA id sb20sm255703ejb.100.2021.05.03.12.15.14 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 03 May 2021 12:15:14 -0700 (PDT) Date: Mon, 3 May 2021 21:15:08 +0200 From: Daniel Vetter To: Linus Torvalds Cc: DRI Development , LKML , linux-mm@kvack.org, linux-arm-kernel@lists.infradead.org, linux-media@vger.kernel.org, linux-samsung-soc@vger.kernel.org Subject: [PULL] topic/iomem-mmap-vs-gup Message-ID: Mail-Followup-To: Linus Torvalds , DRI Development , LKML , linux-mm@kvack.org, linux-arm-kernel@lists.infradead.org, linux-media@vger.kernel.org, linux-samsung-soc@vger.kernel.org MIME-Version: 1.0 Content-Disposition: inline X-Operating-System: Linux phenom 5.10.32scarlett+ Precedence: bulk List-ID: X-Mailing-List: linux-samsung-soc@vger.kernel.org Hi Linus, It's still the same topic branch as last merge window, but the name isn't fitting all that well anymore :-) Anyway here's a small pull for you to ponder, now that the big ones are all through. It's been in -next almost the entire cycle, I've only done some non-code rebases due to the -rc1 fumble and to fix some commit message typos. Christoph Hellwig also looked at these and aside from wanting to outright remove it all didn't have objections. topic/iomem-mmap-vs-gup-2021-05-03: unexport follow_pfn Follow-up to my pull from last merge window: kvm and vfio lost their very unsafe use of follow_pfn, this appropriately marks up the very last user for some userptr-as-buffer use-cases in media. There was some resistance to outright removing it, maybe we can do this in a few releases. Cheers, Daniel The following changes since commit 0d02ec6b3136c73c09e7859f0d0e4e2c4c07b49b: Linux 5.12-rc4 (2021-03-21 14:56:43 -0700) are available in the Git repository at: git://anongit.freedesktop.org/drm/drm tags/topic/iomem-mmap-vs-gup-2021-05-03 for you to fetch changes up to ac8b8400620a4b0d9ca903ee9ad440bec736f5fa: mm: unexport follow_pfn (2021-04-08 16:54:38 +0200) ---------------------------------------------------------------- unexport follow_pfn Follow-up to my pull from last merge window: kvm and vfio lost their very unsafe use of follow_pfn, this appropriately marks up the very last user for some userptr-as-buffer use-cases in media. There was some resistance to outright removing it, maybe we can do this in a few releases. ---------------------------------------------------------------- Daniel Vetter (3): mm: Add unsafe_follow_pfn media/videobuf1|2: Mark follow_pfn usage as unsafe mm: unexport follow_pfn drivers/media/common/videobuf2/frame_vector.c | 2 +- drivers/media/v4l2-core/videobuf-dma-contig.c | 2 +- include/linux/mm.h | 4 +-- mm/memory.c | 46 +++++++++++++++++---------- mm/nommu.c | 28 ++++++++++++---- security/Kconfig | 13 ++++++++ 6 files changed, 68 insertions(+), 27 deletions(-)