From patchwork Fri Aug 2 02:19:43 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: 11072939 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 11B3613A4 for ; Fri, 2 Aug 2019 08:20:47 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 01B11285B5 for ; Fri, 2 Aug 2019 08:20:47 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id E8B54286E2; Fri, 2 Aug 2019 08:20:46 +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=-5.2 required=2.0 tests=BAYES_00,DKIM_ADSP_CUSTOM_MED, FREEMAIL_FROM,MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED autolearn=unavailable version=3.3.1 Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id A472B285B5 for ; Fri, 2 Aug 2019 08:20:46 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 2C81B6ED1F; Fri, 2 Aug 2019 08:19:22 +0000 (UTC) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from mail-pl1-x641.google.com (mail-pl1-x641.google.com [IPv6:2607:f8b0:4864:20::641]) by gabe.freedesktop.org (Postfix) with ESMTPS id 2ECEC6E866; Fri, 2 Aug 2019 02:20:31 +0000 (UTC) Received: by mail-pl1-x641.google.com with SMTP id c14so32935443plo.0; Thu, 01 Aug 2019 19:20:31 -0700 (PDT) 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=qtbgyNHZ/W16Wsr49ObVlGXNsYs5Ix8cECAWpHw8QNg=; b=LractypOlbwXopufMsrkVPM5EMvWVDrNNc6Rw9WmuIMnTs6HQpDvNu8CZb+Lg2uzfk +sI37ewQuKRbntSvC6JT5fxh8SoytA+yUGnowjJjNivZHZgbOInzU4M8R6yJmU6+wgtq HrRMQzUpnq18yJSA09Jpm4KQn47CDt8ERVoKVfHz/SDY+QeIOy+Y3vfpqVMWYkqXaBhg GuKgY6T96QjUio5aljjAVxmdoR6bNejk338Z18ynXHtzG2Wyd0S6eS0gAZT2qi3ZHT5n 11GS9pat7cLj9UwbttXy87xBKo3lXhmBzf3RYzfY7scat5hU96dP1QlA1X5/b7HqD1IT RhoQ== X-Gm-Message-State: APjAAAVjY6+Ipnktcq/+9JXt9JAk3rUHVm808swLPJ3ZKYFqzdwoSMnV RHQT43y9uLiQ/jPsRIlS4/g= X-Google-Smtp-Source: APXvYqwKrOY4Kztkj41s0a6oi7zayzaXd8LpjaiCIksbrU4wJsvnJgU6mF0Bb9Hw/Pj5xfTEZIafcQ== X-Received: by 2002:a17:902:5ac4:: with SMTP id g4mr131986648plm.80.1564712430821; Thu, 01 Aug 2019 19:20:30 -0700 (PDT) Received: from blueforge.nvidia.com (searspoint.nvidia.com. [216.228.112.21]) by smtp.gmail.com with ESMTPSA id u9sm38179744pgc.5.2019.08.01.19.20.29 (version=TLS1_3 cipher=AEAD-AES256-GCM-SHA384 bits=256/256); Thu, 01 Aug 2019 19:20:30 -0700 (PDT) From: john.hubbard@gmail.com X-Google-Original-From: jhubbard@nvidia.com To: Andrew Morton Subject: [PATCH 12/34] vmci: convert put_page() to put_user_page*() Date: Thu, 1 Aug 2019 19:19:43 -0700 Message-Id: <20190802022005.5117-13-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 X-Mailman-Approved-At: Fri, 02 Aug 2019 08:19:03 +0000 X-Mailman-Original-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=qtbgyNHZ/W16Wsr49ObVlGXNsYs5Ix8cECAWpHw8QNg=; b=RO5t4Ioq4WOEkql+z1BxTA9XpQ5l0uBsUNJdBVpEbEdDpylZNAFokBSBfkt63Vmsnw KKnFnDLW2SLxaXe4yEcd4Uwphs0F9rh9yrBF7wrtI6jX7Smsup4E8B+OCU5PAghiuPUe n/rru2nRkN4fBDLxv0E5LWIc3+ez3bVuBV4gRzIu0YbbR7/jG/nHlqRg4ui2ABpoKbbs zzA9SmSgidMvseL2Kb+bN8XRYc2qyorbmCL2eKn81WG2j5TabLu8TlIG3hp8Y7Gq/i02 vYgsWfOu94xgHEddrADmlOmkGGALS2TQwhC3ZfS61Jjz+jw13+1q5hfNRcQVjxbv88fI 6ULQ== X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-fbdev@vger.kernel.org, Jan Kara , kvm@vger.kernel.org, "Gustavo A. R. Silva" , Dave Hansen , Dave Chinner , dri-devel@lists.freedesktop.org, linux-mm@kvack.org, sparclinux@vger.kernel.org, Ira Weiny , ceph-devel@vger.kernel.org, devel@driverdev.osuosl.org, rds-devel@oss.oracle.com, linux-rdma@vger.kernel.org, x86@kernel.org, amd-gfx@lists.freedesktop.org, Christoph Hellwig , Jason Gunthorpe , xen-devel@lists.xenproject.org, devel@lists.orangefs.org, linux-media@vger.kernel.org, Kees Cook , Arnd Bergmann , John Hubbard , intel-gfx@lists.freedesktop.org, linux-block@vger.kernel.org, =?utf-8?b?SsOpcsO0bWUgR2xpc3Nl?= , linux-rpi-kernel@lists.infradead.org, Dan Williams , linux-arm-kernel@lists.infradead.org, linux-nfs@vger.kernel.org, netdev@vger.kernel.org, LKML , linux-xfs@vger.kernel.org, linux-crypto@vger.kernel.org, linux-fsdevel@vger.kernel.org, Al Viro Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" 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 Christophe 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 *)); } /*