From patchwork Fri Aug 2 02:20:00 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: john.hubbard@gmail.com X-Patchwork-Id: 11071975 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 7ECD5746 for ; Fri, 2 Aug 2019 02:22:24 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 70D672877B for ; Fri, 2 Aug 2019 02:22:24 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 63CE7287C0; Fri, 2 Aug 2019 02:22:24 +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 026172877B for ; Fri, 2 Aug 2019 02:22:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732576AbfHBCWP (ORCPT ); Thu, 1 Aug 2019 22:22:15 -0400 Received: from mail-pg1-f193.google.com ([209.85.215.193]:44608 "EHLO mail-pg1-f193.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2403914AbfHBCU6 (ORCPT ); Thu, 1 Aug 2019 22:20:58 -0400 Received: by mail-pg1-f193.google.com with SMTP id i18so35237465pgl.11; Thu, 01 Aug 2019 19:20:57 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=P44t64b1Yt2CczJo6SOAPYnnEfAXhRMhGjbg0YSdFKY=; b=pDDjdXXj6RFblmUZntZEJACUef7RKkNl/YK04UbkHBUCjruhPz1DvjNzBz0yKiKhLU m7TMmjuez3cY0GOJbOTSBK2VUdIVnusEW0vCSFZAYXoD3irkbR/lbNxP1xvdu08hMie7 kzmRBnIq1D5NEN+UIvAycIBnd5W1b4XDWFug/SXkacUthZGPwZUithvAb6zFZK598+Zf KNchzaJdTnwJOaC7HcvTulBYTwt81Zp1hO/B2Q1bZULoUdzowXbHyNeGUScibcu9SmcM prETRVYk+V5bEeFpHbvbtuzpFBWpu22yc2ThdO/xtNJdbTSkoBepWkhbKAkxtBTCzSLm uqtg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=P44t64b1Yt2CczJo6SOAPYnnEfAXhRMhGjbg0YSdFKY=; b=I2dd7GdjYesAwpcwaii4fUYL/NfMHkwdsDtEDVPZlke8HOUiY3MRyJCf8sne/UDsbj QTKnPYBM0OMJ3DUwpG+LYY+mbvwn9xEMlO/mA9dD8UCEY1S99m7k3bYcvXU1LZMIcCKO pACyyNWEvnLnUUINjLdEPSU9MEk6/sPzyKphTNzIJz01rH43lFkNAAR0U0XJKvFq4pvs EXEmNWCtmKGJBjgUDBhkuBnrzJcFfYwmJr+YaVgejqHkdKeQL8wSO+jr8V7q2k4AHkju aTEvIgsO0MSZ+rEPV6BDoUzkbPfiZ9Wx++OoVHh9rbeA69fHHv7zZIPetTpPSvBskpyu xEfw== X-Gm-Message-State: APjAAAXmsz/WejV18uuXBW/Isv7NFGQgxsDt7jb8MlfldP81UfWod6mo /Us4Q6Gki0s13DshMybSHqo4oC290gw= X-Google-Smtp-Source: APXvYqzmhx2HN9zJqN7W3z+BTBjGONUj50lIUbKXplqq4RVMAlpQQWHUfPagZ1wT+1La24vM3uCr4Q== X-Received: by 2002:a63:9c5:: with SMTP id 188mr86233384pgj.2.1564712457422; Thu, 01 Aug 2019 19:20:57 -0700 (PDT) Received: from blueforge.nvidia.com (searspoint.nvidia.com. [216.228.112.21]) by smtp.gmail.com with ESMTPSA id u9sm38179744pgc.5.2019.08.01.19.20.55 (version=TLS1_3 cipher=AEAD-AES256-GCM-SHA384 bits=256/256); Thu, 01 Aug 2019 19:20:56 -0700 (PDT) From: john.hubbard@gmail.com X-Google-Original-From: jhubbard@nvidia.com To: Andrew Morton Cc: Christoph Hellwig , Dan Williams , Dave Chinner , Dave Hansen , Ira Weiny , Jan Kara , Jason Gunthorpe , =?utf-8?b?SsOpcsO0?= =?utf-8?b?bWUgR2xpc3Nl?= , LKML , amd-gfx@lists.freedesktop.org, ceph-devel@vger.kernel.org, devel@driverdev.osuosl.org, devel@lists.orangefs.org, dri-devel@lists.freedesktop.org, intel-gfx@lists.freedesktop.org, kvm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-block@vger.kernel.org, linux-crypto@vger.kernel.org, linux-fbdev@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-media@vger.kernel.org, linux-mm@kvack.org, linux-nfs@vger.kernel.org, linux-rdma@vger.kernel.org, linux-rpi-kernel@lists.infradead.org, linux-xfs@vger.kernel.org, netdev@vger.kernel.org, rds-devel@oss.oracle.com, sparclinux@vger.kernel.org, x86@kernel.org, xen-devel@lists.xenproject.org, John Hubbard , Al Viro , Andrea Arcangeli , Christopher Yeoh , Heiko Carstens , Ingo Molnar , Jann Horn , Lorenzo Stoakes , Mathieu Desnoyers , Mike Rapoport , Rashika Kheria Subject: [PATCH 29/34] mm/process_vm_access.c: convert put_page() to put_user_page*() Date: Thu, 1 Aug 2019 19:20:00 -0700 Message-Id: <20190802022005.5117-30-jhubbard@nvidia.com> X-Mailer: git-send-email 2.22.0 In-Reply-To: <20190802022005.5117-1-jhubbard@nvidia.com> References: <20190802022005.5117-1-jhubbard@nvidia.com> MIME-Version: 1.0 X-NVConfidentiality: public 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 From: John Hubbard For pages that were retained via get_user_pages*(), release those pages via the new put_user_page*() routines, instead of via put_page() or release_pages(). This is part a tree-wide conversion, as described in commit fc1d8e7cca2d ("mm: introduce put_user_page*(), placeholder versions"). Cc: Al Viro Cc: Andrea Arcangeli Cc: Christopher Yeoh Cc: Dave Hansen Cc: Heiko Carstens Cc: Ingo Molnar Cc: Jann Horn Cc: Lorenzo Stoakes Cc: Mathieu Desnoyers Cc: Mike Rapoport Cc: Rashika Kheria Signed-off-by: John Hubbard --- mm/process_vm_access.c | 18 +++++++++--------- 1 file changed, 9 insertions(+), 9 deletions(-) diff --git a/mm/process_vm_access.c b/mm/process_vm_access.c index 357aa7bef6c0..4d29d54ec93f 100644 --- a/mm/process_vm_access.c +++ b/mm/process_vm_access.c @@ -96,7 +96,7 @@ static int process_vm_rw_single_vec(unsigned long addr, flags |= FOLL_WRITE; while (!rc && nr_pages && iov_iter_count(iter)) { - int pages = min(nr_pages, max_pages_per_loop); + int pinned_pages = min(nr_pages, max_pages_per_loop); int locked = 1; size_t bytes; @@ -106,14 +106,15 @@ static int process_vm_rw_single_vec(unsigned long addr, * current/current->mm */ down_read(&mm->mmap_sem); - pages = get_user_pages_remote(task, mm, pa, pages, flags, - process_pages, NULL, &locked); + pinned_pages = get_user_pages_remote(task, mm, pa, pinned_pages, + flags, process_pages, NULL, + &locked); if (locked) up_read(&mm->mmap_sem); - if (pages <= 0) + if (pinned_pages <= 0) return -EFAULT; - bytes = pages * PAGE_SIZE - start_offset; + bytes = pinned_pages * PAGE_SIZE - start_offset; if (bytes > len) bytes = len; @@ -122,10 +123,9 @@ static int process_vm_rw_single_vec(unsigned long addr, vm_write); len -= bytes; start_offset = 0; - nr_pages -= pages; - pa += pages * PAGE_SIZE; - while (pages) - put_page(process_pages[--pages]); + nr_pages -= pinned_pages; + pa += pinned_pages * PAGE_SIZE; + put_user_pages(process_pages, pinned_pages); } return rc;