From patchwork Sun Aug 4 22:48:53 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: 11075631 X-Patchwork-Delegate: herbert@gondor.apana.org.au 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 AAFE01395 for ; Sun, 4 Aug 2019 22:55:05 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 9B42C287B4 for ; Sun, 4 Aug 2019 22:55:05 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 8E8882882A; Sun, 4 Aug 2019 22:55:05 +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 348C4287B4 for ; Sun, 4 Aug 2019 22:55:05 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727340AbfHDWtl (ORCPT ); Sun, 4 Aug 2019 18:49:41 -0400 Received: from mail-pg1-f196.google.com ([209.85.215.196]:39834 "EHLO mail-pg1-f196.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727263AbfHDWtj (ORCPT ); Sun, 4 Aug 2019 18:49:39 -0400 Received: by mail-pg1-f196.google.com with SMTP id u17so38667051pgi.6; Sun, 04 Aug 2019 15:49:38 -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=j5bjFl/k0oxV1FIP4HazX0NuQurNmMvZSnaBil5PKNk=; b=MqpI7yn2v8JiaESKRamQoMhID5IYen684AVXtcKPVHm7ukeZx5WJLqHqdIEJqV0WrU VfCpQM5hioJATjULHPTYB3nfhDV1hZvNLdoXtUM170GmrlC8kjyYeFhBDtjPQS6eYlGi Z1KZbaNfekNsK96f9fHDqC8EM5JDem4jjQqa0uOUzUD0HnkcyB0RGrqGZafbKz+HSERm ycJb8r/hMPkJxrohrkltdvb3Bv5T3e9OF54rrvF1bh8OIMrv7vUbWFQiw+cjVGvVjkWZ fASWr56xEv6QUfwcZwREb2sSNIm1Ysoe7red/z7MjIlPR6uaG4NZls/tzbyEvLg9FjxD 24hg== 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=j5bjFl/k0oxV1FIP4HazX0NuQurNmMvZSnaBil5PKNk=; b=L6FHDsvzLb0Vu8eeuOvWYygPUGxZONZTgyG6tW57aangYzKHzdD97TlhJXtLKMEOG/ aRin8xoxDsxQsYK3sRThFy7vNHgqpEnEPWpUXDaLWwnHGten9dzdR6i1gpmcABmAyJMe lcTKi2XuyyQsnVfvlnx7hrvGYi5uqR7xXFweFKx17HCT4N3sjfTXBelptuqKpLazfBXA V/PSI8dNs1oD4ROMs75Ioa6uS5lHi5RWLHLUomvFsweeomNX58jmomBOAlwTph8oT8dl AbLVo7SkzvkkVy2W4wRKcmIids7C/dQhKjGVXYvIK/ZZPx/B5X+D+34TdczO0MgomZpT WDjA== X-Gm-Message-State: APjAAAXkCeRoVBuY7Fv9zK60oVjza54YzRCUQsBiAv/MF43GwHPWRPQE ydg7ULw//TrTDEYuw3j9zXg= X-Google-Smtp-Source: APXvYqwTnNt3iCmBWtT8pTi/FFYixGudghLt9/4mGGXij726CsdCF3vK7jbIkfaYxVJp0BLjNqynIA== X-Received: by 2002:a17:90a:b908:: with SMTP id p8mr15231945pjr.94.1564958978299; Sun, 04 Aug 2019 15:49:38 -0700 (PDT) Received: from blueforge.nvidia.com (searspoint.nvidia.com. [216.228.112.21]) by smtp.gmail.com with ESMTPSA id r6sm35946836pjb.22.2019.08.04.15.49.36 (version=TLS1_3 cipher=AEAD-AES256-GCM-SHA384 bits=256/256); Sun, 04 Aug 2019 15:49:37 -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 , Arnd Bergmann , Al Viro , "Gustavo A . R . Silva" , Kees Cook Subject: [PATCH v2 12/34] vmci: convert put_page() to put_user_page*() Date: Sun, 4 Aug 2019 15:48:53 -0700 Message-Id: <20190804224915.28669-13-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: linux-crypto-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-crypto@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"). Note that this effectively changes the code's behavior in qp_release_pages(): it now ultimately calls set_page_dirty_lock(), instead of set_page_dirty(). This is probably more accurate. As Christoph Hellwig put it, "set_page_dirty() is only safe if we are dealing with a file backed page where we have reference on the inode it hangs off." [1] [1] https://lore.kernel.org/r/20190723153640.GB720@lst.de Cc: Arnd Bergmann Cc: Al Viro Cc: Gustavo A. R. Silva Cc: Kees Cook Signed-off-by: John Hubbard --- drivers/misc/vmw_vmci/vmci_context.c | 2 +- drivers/misc/vmw_vmci/vmci_queue_pair.c | 11 ++--------- 2 files changed, 3 insertions(+), 10 deletions(-) diff --git a/drivers/misc/vmw_vmci/vmci_context.c b/drivers/misc/vmw_vmci/vmci_context.c index 16695366ec92..9daa52ee63b7 100644 --- a/drivers/misc/vmw_vmci/vmci_context.c +++ b/drivers/misc/vmw_vmci/vmci_context.c @@ -587,7 +587,7 @@ void vmci_ctx_unset_notify(struct vmci_ctx *context) if (notify_page) { kunmap(notify_page); - put_page(notify_page); + put_user_page(notify_page); } } diff --git a/drivers/misc/vmw_vmci/vmci_queue_pair.c b/drivers/misc/vmw_vmci/vmci_queue_pair.c index 8531ae781195..e5434551d0ef 100644 --- a/drivers/misc/vmw_vmci/vmci_queue_pair.c +++ b/drivers/misc/vmw_vmci/vmci_queue_pair.c @@ -626,15 +626,8 @@ static void qp_release_queue_mutex(struct vmci_queue *queue) static void qp_release_pages(struct page **pages, u64 num_pages, bool dirty) { - int i; - - for (i = 0; i < num_pages; i++) { - if (dirty) - set_page_dirty(pages[i]); - - put_page(pages[i]); - pages[i] = NULL; - } + put_user_pages_dirty_lock(pages, num_pages, dirty); + memset(pages, 0, num_pages * sizeof(struct page *)); } /*