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[209.85.220.65]) by mx.google.com with SMTPS id u11sor12320246pgp.78.2019.03.18.19.26.17 for (Google Transport Security); Mon, 18 Mar 2019 19:26:17 -0700 (PDT) Received-SPF: pass (google.com: domain of jrdr.linux@gmail.com designates 209.85.220.65 as permitted sender) client-ip=209.85.220.65; Authentication-Results: mx.google.com; dkim=pass header.i=@gmail.com header.s=20161025 header.b=axQ01i8I; spf=pass (google.com: domain of jrdr.linux@gmail.com designates 209.85.220.65 as permitted sender) smtp.mailfrom=jrdr.linux@gmail.com; dmarc=pass (p=NONE sp=QUARANTINE dis=NONE) header.from=gmail.com DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to:user-agent; bh=F9hIq6OqtC1SVS2O3U7ZkPoLnNclA70DsapCWy7Q+lE=; b=axQ01i8IBZi45x8kocMbwsCnxyGWV2J6KPZD0Kvgs2/Yaw/Le0kbKh4v6TjS8TlLN/ Fp1i11g2wUSy9AxXfQGRlmcKVs6D+8q5JgaGppoXZDWZ6E08ke8uQygcG2EGAEoCtGsx UFLiaLRZlpLGEKiubhXWZ/PmRqC3+92ojBfVO/yWdt0kFn/ZAPUhGKykq5XnL7GFNyle wwduJrwn8QRqkDXVKxcrG+gP4/1dGOKT1a0MvDM0uxgedBI0PBb86jSFen+JBmyPEcp5 OtUtOsoojCEt6asjiBR1//iQ0mQm9kT1vJjSfz2yiTcGpUHiyQD6dTVTpKpFvR5WdtUP RHDA== X-Google-Smtp-Source: APXvYqzT+r2qSiocZjhBB5Mm80gaR6+7Ywju7MjSzVTtt6VaSEqofhbQuEZfX4U+yLgEjsULEq7Ykw== X-Received: by 2002:a63:f74c:: with SMTP id f12mr75210pgk.124.1552962376538; Mon, 18 Mar 2019 19:26:16 -0700 (PDT) Received: from jordon-HP-15-Notebook-PC ([106.51.22.39]) by smtp.gmail.com with ESMTPSA id u13sm18812634pfa.169.2019.03.18.19.26.15 (version=TLS1 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Mon, 18 Mar 2019 19:26:15 -0700 (PDT) Date: Tue, 19 Mar 2019 08:00:51 +0530 From: Souptick Joarder To: akpm@linux-foundation.org, willy@infradead.org, mhocko@suse.com, boris.ostrovsky@oracle.com, jgross@suse.com, linux@armlinux.org.uk, robin.murphy@arm.com Cc: xen-devel@lists.xenproject.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: [RESEND PATCH v4 9/9] xen/privcmd-buf.c: Convert to use vm_map_pages_zero() Message-ID: References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.21 (2010-09-15) X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Convert to use vm_map_pages_zero() to map range of kernel memory to user vma. This driver has ignored vm_pgoff. We could later "fix" these drivers to behave according to the normal vm_pgoff offsetting simply by removing the _zero suffix on the function name and if that causes regressions, it gives us an easy way to revert. Signed-off-by: Souptick Joarder Reviewed-by: Boris Ostrovsky --- drivers/xen/privcmd-buf.c | 8 ++------ 1 file changed, 2 insertions(+), 6 deletions(-) diff --git a/drivers/xen/privcmd-buf.c b/drivers/xen/privcmd-buf.c index de01a6d..d02dc43 100644 --- a/drivers/xen/privcmd-buf.c +++ b/drivers/xen/privcmd-buf.c @@ -166,12 +166,8 @@ static int privcmd_buf_mmap(struct file *file, struct vm_area_struct *vma) if (vma_priv->n_pages != count) ret = -ENOMEM; else - for (i = 0; i < vma_priv->n_pages; i++) { - ret = vm_insert_page(vma, vma->vm_start + i * PAGE_SIZE, - vma_priv->pages[i]); - if (ret) - break; - } + ret = vm_map_pages_zero(vma, vma_priv->pages, + vma_priv->n_pages); if (ret) privcmd_buf_vmapriv_free(vma_priv); -- 1.9.1 From mboxrd@z Thu Jan 1 00:00:00 1970 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=-8.8 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_PASS,USER_AGENT_GIT 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 8FEAEC10F14 for ; 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[209.85.220.65]) by mx.google.com with SMTPS id u69sor17913924pgd.37.2019.04.16.04.48.02 for (Google Transport Security); Tue, 16 Apr 2019 04:48:02 -0700 (PDT) Received-SPF: pass (google.com: domain of jrdr.linux@gmail.com designates 209.85.220.65 as permitted sender) client-ip=209.85.220.65; Authentication-Results: mx.google.com; dkim=pass header.i=@gmail.com header.s=20161025 header.b=RlNJmhvP; spf=pass (google.com: domain of jrdr.linux@gmail.com designates 209.85.220.65 as permitted sender) smtp.mailfrom=jrdr.linux@gmail.com; dmarc=pass (p=NONE sp=QUARANTINE dis=NONE) header.from=gmail.com 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 :in-reply-to:references; bh=F9hIq6OqtC1SVS2O3U7ZkPoLnNclA70DsapCWy7Q+lE=; b=RlNJmhvPVJ3UxKO1l98lIMDXQUnrSkDMLarOhFladUUf3Fd2LaDOG6+U01Z2z+YiG6 sNYefT86LOIxnqlnmYbZyAcDruQYSCoLZfKjsI5qTBm4ikzvhilXTlPgz8vD0vD1p4zp nUgSswnCr91BRUTNAb6b5zyVdAQ+av7Sc02gJFy++x4EdGU7Ba+eVKI/tSv7RiqlDMKy SLqyqJH65OUoe0UtHrsN3h68RjIqxVfa3ycMpFEZs+Uo8eJrS3RcKM40edoCs9WmwoYn teADUMkiqANnatUpNqvAlG9eQwygGnntxE0k2iDAigCWgYcsyUHjVSZh8cAxSeXbIBT7 1ERg== X-Google-Smtp-Source: APXvYqx2gh4QQGIyXcsK611dByHpjpx+tKjskfqa9rV5hBQis2QAQtHs+h2xQ6nYUrNHQ3rVd4NVTA== X-Received: by 2002:a63:f115:: with SMTP id f21mr70665089pgi.65.1555415282264; Tue, 16 Apr 2019 04:48:02 -0700 (PDT) Received: from jordon-HP-15-Notebook-PC.domain.name ([49.207.50.11]) by smtp.gmail.com with ESMTPSA id p6sm55942835pfd.122.2019.04.16.04.47.53 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Tue, 16 Apr 2019 04:48:01 -0700 (PDT) From: Souptick Joarder To: akpm@linux-foundation.org, willy@infradead.org, mhocko@suse.com, kirill.shutemov@linux.intel.com, vbabka@suse.cz, riel@surriel.com, sfr@canb.auug.org.au, rppt@linux.vnet.ibm.com, peterz@infradead.org, linux@armlinux.org.uk, robin.murphy@arm.com, iamjoonsoo.kim@lge.com, treding@nvidia.com, keescook@chromium.org, m.szyprowski@samsung.com, stefanr@s5r6.in-berlin.de, hjc@rock-chips.com, heiko@sntech.de, airlied@linux.ie, oleksandr_andrushchenko@epam.com, joro@8bytes.org, pawel@osciak.com, kyungmin.park@samsung.com, mchehab@kernel.org, boris.ostrovsky@oracle.com, jgross@suse.com Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-arm-kernel@lists.infradead.org, linux1394-devel@lists.sourceforge.net, dri-devel@lists.freedesktop.org, linux-rockchip@lists.infradead.org, xen-devel@lists.xen.org, iommu@lists.linux-foundation.org, linux-media@vger.kernel.org, Souptick Joarder Subject: [REBASE PATCH v5 9/9] xen/privcmd-buf.c: Convert to use vm_map_pages_zero() Date: Tue, 16 Apr 2019 17:19:50 +0530 Message-Id: X-Mailer: git-send-email 1.9.1 In-Reply-To: References: In-Reply-To: References: X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Content-Type: text/plain; charset="UTF-8" Message-ID: <20190416114950.27EV10zNOmxrG49iU1u3MZSkIex259DFj5dCqzRt6ew@z> Convert to use vm_map_pages_zero() to map range of kernel memory to user vma. This driver has ignored vm_pgoff. We could later "fix" these drivers to behave according to the normal vm_pgoff offsetting simply by removing the _zero suffix on the function name and if that causes regressions, it gives us an easy way to revert. Signed-off-by: Souptick Joarder Reviewed-by: Boris Ostrovsky --- drivers/xen/privcmd-buf.c | 8 ++------ 1 file changed, 2 insertions(+), 6 deletions(-) diff --git a/drivers/xen/privcmd-buf.c b/drivers/xen/privcmd-buf.c index de01a6d..d02dc43 100644 --- a/drivers/xen/privcmd-buf.c +++ b/drivers/xen/privcmd-buf.c @@ -166,12 +166,8 @@ static int privcmd_buf_mmap(struct file *file, struct vm_area_struct *vma) if (vma_priv->n_pages != count) ret = -ENOMEM; else - for (i = 0; i < vma_priv->n_pages; i++) { - ret = vm_insert_page(vma, vma->vm_start + i * PAGE_SIZE, - vma_priv->pages[i]); - if (ret) - break; - } + ret = vm_map_pages_zero(vma, vma_priv->pages, + vma_priv->n_pages); if (ret) privcmd_buf_vmapriv_free(vma_priv); -- 1.9.1