From patchwork Sun Aug 4 22:49:00 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: 11075505 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 4DD791395 for ; Sun, 4 Aug 2019 22:53:46 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 3D4C4287B4 for ; Sun, 4 Aug 2019 22:53:46 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 30ADA2882A; Sun, 4 Aug 2019 22:53:46 +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 CD8EB287B9 for ; Sun, 4 Aug 2019 22:53:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727284AbfHDWxe (ORCPT ); Sun, 4 Aug 2019 18:53:34 -0400 Received: from mail-pf1-f193.google.com ([209.85.210.193]:43731 "EHLO mail-pf1-f193.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727541AbfHDWtu (ORCPT ); Sun, 4 Aug 2019 18:49:50 -0400 Received: by mail-pf1-f193.google.com with SMTP id i189so38600672pfg.10; Sun, 04 Aug 2019 15:49:49 -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=py067aGaFWqYQnWW3CrL2Yk9VWIyNl4WEpwUsrZ7LgI=; b=P8+hbDz6iDdAtFosRygKfZrawOprY/RqOz+jkdBR9/iAK9lQTDaHpPD0YVzeAsadTA 6buCCtQt6FcRN+b9XggnJ5bqnrb15u93xXHo/kWkRIj/AEZJAg96rbyj3hSasGDU5QMN kLomBnFCn//tdm3UAsqLPAHdx4izNhPtZ1DR2n/EeVgTygzhGs4N/AXfq0vWNV5wg6OG nDjWxo9WfIwu4zNuVNFOgCWRwLE7DfTE0h0+OhqrWzWxBngYRK81NL6ifxTbjwc0Tsbz dA0CzQ264QnjubFwn/fuuREzrVo+nBB4mnVLQqsZ8A+pWd/WcxXuqwIjuSU30F6iEjCB X4GA== 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=py067aGaFWqYQnWW3CrL2Yk9VWIyNl4WEpwUsrZ7LgI=; b=lSfCAM91IxcV/wvYMz/f0RiYnPxzZxFSXgZAMVrNmegv18tJmSig/oIB8iQwTFtLeA NYWubwyGAmrB5sZLN7ARfp0Mf9pHe6Usqo8w6HZG0xwiRv6TqqUwoHZO/vgUFFoaErTc RTlajzNyaHW9tTqWOiLfuHh+/6ehBOq+M+i7FZfpGZJWaUWv0UHZ3uvxyoJ4aDpe5SPs qLOqLgLCA3+vx55N+GFneUbjXoTFj5nHmcvn/Yaexx0pdKGmhHJcs8L/OKOiOrOzFZb3 vNh5KpcqXaHOtbwHuqGdSGkW5PgpvOq8J3y2xgoBxx64YjUBYNKiuW8BKOU9Dyr/wBK3 XwPA== X-Gm-Message-State: APjAAAX3TnngaaRiUC35CQRexQ7giO8dt67bF7uUtoIrAojNdy9ISM8t Y2xcDeF0G08v10W7hLE+4v4= X-Google-Smtp-Source: APXvYqyegNlmLCsE27HWcwEQVob39MHAl+cimFnsXUYquTno1Yk7+aU+Agg2DBt67SqnkuavcPllBQ== X-Received: by 2002:a63:29c4:: with SMTP id p187mr82820390pgp.330.1564958989494; Sun, 04 Aug 2019 15:49:49 -0700 (PDT) Received: from blueforge.nvidia.com (searspoint.nvidia.com. [216.228.112.21]) by smtp.gmail.com with ESMTPSA id r6sm35946836pjb.22.2019.08.04.15.49.48 (version=TLS1_3 cipher=AEAD-AES256-GCM-SHA384 bits=256/256); Sun, 04 Aug 2019 15:49:49 -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 , Kees Cook , Rob Herring Subject: [PATCH v2 19/34] fsl_hypervisor: convert put_page() to put_user_page*() Date: Sun, 4 Aug 2019 15:49:00 -0700 Message-Id: <20190804224915.28669-20-jhubbard@nvidia.com> X-Mailer: git-send-email 2.22.0 In-Reply-To: <20190804224915.28669-1-jhubbard@nvidia.com> References: <20190804224915.28669-1-jhubbard@nvidia.com> MIME-Version: 1.0 X-NVConfidentiality: public Sender: ceph-devel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: ceph-devel@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"). This changes the release code slightly, because each page slot in the page_list[] array is no longer checked for NULL. However, that check was wrong anyway, because the get_user_pages() pattern of usage here never allowed for NULL entries within a range of pinned pages. Cc: Al Viro Cc: Kees Cook Cc: Rob Herring Signed-off-by: John Hubbard --- drivers/virt/fsl_hypervisor.c | 7 ++----- 1 file changed, 2 insertions(+), 5 deletions(-) diff --git a/drivers/virt/fsl_hypervisor.c b/drivers/virt/fsl_hypervisor.c index 93d5bebf9572..a8f78d572c45 100644 --- a/drivers/virt/fsl_hypervisor.c +++ b/drivers/virt/fsl_hypervisor.c @@ -292,11 +292,8 @@ static long ioctl_memcpy(struct fsl_hv_ioctl_memcpy __user *p) virt_to_phys(sg_list), num_pages); exit: - if (pages) { - for (i = 0; i < num_pages; i++) - if (pages[i]) - put_page(pages[i]); - } + if (pages) + put_user_pages(pages, num_pages); kfree(sg_list_unaligned); kfree(pages);