From patchwork Tue Jul 24 08:45:09 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Huaisheng Ye X-Patchwork-Id: 10541677 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 AD8D21822 for ; Tue, 24 Jul 2018 08:46:20 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 9E05C28782 for ; Tue, 24 Jul 2018 08:46:20 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 9076528787; Tue, 24 Jul 2018 08:46:20 +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=-2.8 required=2.0 tests=BAYES_00,DKIM_SIGNED, FREEMAIL_FROM,MAILING_LIST_MULTI,RCVD_IN_DNSWL_NONE autolearn=ham version=3.3.1 Received: from ml01.01.org (ml01.01.org [198.145.21.10]) (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 49F0E28782 for ; Tue, 24 Jul 2018 08:46:20 +0000 (UTC) Received: from [127.0.0.1] (localhost [IPv6:::1]) by ml01.01.org (Postfix) with ESMTP id 411FB210C1249; Tue, 24 Jul 2018 01:46:20 -0700 (PDT) X-Original-To: linux-nvdimm@lists.01.org Delivered-To: linux-nvdimm@lists.01.org Received-SPF: Pass (sender SPF authorized) identity=mailfrom; client-ip=135.84.80.237; helo=sender-pp-092.zoho.com; envelope-from=yehs2007@zoho.com; receiver=linux-nvdimm@lists.01.org Received: from sender-pp-092.zoho.com (sender-pp-092.zoho.com [135.84.80.237]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-SHA384 (256/256 bits)) (No client certificate requested) by ml01.01.org (Postfix) with ESMTPS id E8062210C0F60 for ; Tue, 24 Jul 2018 01:46:18 -0700 (PDT) DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=zapps768; d=zoho.com; h=from:to:cc:subject:date:message-id:in-reply-to:references; b=ppEO6DBSnfNP4J/dFkH4obDeqZyuYFOLYZr71rHsEgVbUgoG17fkdiseJgWWyO4HIZPpLAer8hdd gTrjmQzvAEZLsgVp2KBdnbCKCoOWQSDIfzI2fUgioZ/DOHVd4t3D Received: from YEHS1XR956R00D1.lenovo.com (123.120.61.139 [123.120.61.139]) by mx.zohomail.com with SMTPS id 153242195170641.122805832657036; Tue, 24 Jul 2018 01:45:51 -0700 (PDT) From: Huaisheng Ye To: linux-nvdimm@lists.01.org, dan.j.williams@intel.com Subject: [PATCH 4/5] filesystem-dax: Do not request a pointer kaddr when not required Date: Tue, 24 Jul 2018 16:45:09 +0800 Message-Id: <20180724084510.6104-5-yehs2007@zoho.com> X-Mailer: git-send-email 2.17.0.windows.1 In-Reply-To: <20180724084510.6104-1-yehs2007@zoho.com> References: <20180724084510.6104-1-yehs2007@zoho.com> X-ZohoMailClient: External X-BeenThere: linux-nvdimm@lists.01.org X-Mailman-Version: 2.1.27 Precedence: list List-Id: "Linux-nvdimm developer list." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: axboe@kernel.dk, linux-s390@vger.kernel.org, chengnt@lenovo.com, linux-fsdevel@vger.kernel.org, heiko.carstens@de.ibm.com, linux-kernel@vger.kernel.org, willy@infradead.org, bart.vanassche@wdc.com, viro@zeniv.linux.org.uk, gregkh@linuxfoundation.org, schwidefsky@de.ibm.com, jack@suse.cz MIME-Version: 1.0 Errors-To: linux-nvdimm-bounces@lists.01.org Sender: "Linux-nvdimm" X-Virus-Scanned: ClamAV using ClamSMTP From: Huaisheng Ye Some functions within fs/dax don't need to get pointer kaddr from direct_access. In support of allowing memmap initialization to run in the background elide requests for pointer kaddr when not required. Signed-off-by: Huaisheng Ye --- fs/dax.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/fs/dax.c b/fs/dax.c index aaec72de..abdb9e2 100644 --- a/fs/dax.c +++ b/fs/dax.c @@ -870,7 +870,6 @@ static int dax_iomap_pfn(struct iomap *iomap, loff_t pos, size_t size, { const sector_t sector = dax_iomap_sector(iomap, pos); pgoff_t pgoff; - void *kaddr; int id, rc; long length; @@ -879,7 +878,7 @@ static int dax_iomap_pfn(struct iomap *iomap, loff_t pos, size_t size, return rc; id = dax_read_lock(); length = dax_direct_access(iomap->dax_dev, pgoff, PHYS_PFN(size), - &kaddr, pfnp); + NULL, pfnp); if (length < 0) { rc = length; goto out;