From patchwork Wed Jan 17 20:21:25 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Matthew Wilcox X-Patchwork-Id: 10171255 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 9D2B8603B5 for ; Wed, 17 Jan 2018 20:43:27 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 8D85520243 for ; Wed, 17 Jan 2018 20:43:27 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 80A1A223A1; Wed, 17 Jan 2018 20:43:27 +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=-6.8 required=2.0 tests=BAYES_00,DKIM_SIGNED, RCVD_IN_DNSWL_HI,T_DKIM_INVALID 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 F249A20243 for ; Wed, 17 Jan 2018 20:43:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754565AbeAQUmz (ORCPT ); Wed, 17 Jan 2018 15:42:55 -0500 Received: from bombadil.infradead.org ([65.50.211.133]:52259 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753723AbeAQUWv (ORCPT ); Wed, 17 Jan 2018 15:22:51 -0500 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20170209; h=References:In-Reply-To:Message-Id: Date:Subject:Cc:To:From:Sender:Reply-To:MIME-Version:Content-Type: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id: List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=ATGFKhqyH2T5U1HUZMqsryAWBagEjgPv8+V/QavNJZs=; b=uVzUKcEixPLeXPEn9sddjJFQ2 idpcAGr+08afe1jCf+/QXiRryHy8v0xWjs3avWDMO994NSWNC+rWmKsJhR/NCJp1q3nI+/mb9ZdbJ bysZoMEXC0wWdYxEgCJZrdOfDn1mQFikQAZHk7hSr4wbWdfoMeoQI9THHjd8Vk5gkIDht0Vdgf5A8 gQQraXx8Z723i1kK26rgKRdbcsEuCLsy2FarBPlFEfaULt75ClnKoHn21R3Dz76Adcjz+VAY8G7qu 6vYQaxi8wW1rAnVeYJ5NnXm0bTMDUY/TiRSWYbgjd2/QY+/ItqY4jdl7CMM/bb/fKJFMotV8JX57I kEVDj4p5g==; Received: from willy by bombadil.infradead.org with local (Exim 4.89 #1 (Red Hat Linux)) id 1ebuEU-00064p-Kb; Wed, 17 Jan 2018 20:22:50 +0000 From: Matthew Wilcox To: linux-kernel@vger.kernel.org Cc: Matthew Wilcox , linux-mm@kvack.org, linux-fsdevel@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, linux-nilfs@vger.kernel.org, linux-btrfs@vger.kernel.org, linux-xfs@vger.kernel.org, linux-usb@vger.kernel.org, Bjorn Andersson , Stefano Stabellini , iommu@lists.linux-foundation.org, linux-remoteproc@vger.kernel.org, linux-s390@vger.kernel.org, intel-gfx@lists.freedesktop.org, cgroups@vger.kernel.org, linux-sh@vger.kernel.org, David Howells Subject: [PATCH v6 61/99] dax: Convert dax_writeback_one to XArray Date: Wed, 17 Jan 2018 12:21:25 -0800 Message-Id: <20180117202203.19756-62-willy@infradead.org> X-Mailer: git-send-email 2.14.3 In-Reply-To: <20180117202203.19756-1-willy@infradead.org> References: <20180117202203.19756-1-willy@infradead.org> Sender: linux-sh-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-sh@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Matthew Wilcox Likewise easy Signed-off-by: Matthew Wilcox --- fs/dax.c | 17 +++++++---------- 1 file changed, 7 insertions(+), 10 deletions(-) diff --git a/fs/dax.c b/fs/dax.c index 9a30224da4d6..b66b8c896ed8 100644 --- a/fs/dax.c +++ b/fs/dax.c @@ -632,8 +632,7 @@ static int dax_writeback_one(struct block_device *bdev, struct dax_device *dax_dev, struct address_space *mapping, pgoff_t index, void *entry) { - struct radix_tree_root *pages = &mapping->pages; - XA_STATE(xas, pages, index); + XA_STATE(xas, &mapping->pages, index); void *entry2, *kaddr; long ret = 0, id; sector_t sector; @@ -648,7 +647,7 @@ static int dax_writeback_one(struct block_device *bdev, if (WARN_ON(!xa_is_value(entry))) return -EIO; - xa_lock_irq(&mapping->pages); + xas_lock_irq(&xas); entry2 = get_unlocked_mapping_entry(&xas); /* Entry got punched out / reallocated? */ if (!entry2 || WARN_ON_ONCE(!xa_is_value(entry2))) @@ -667,7 +666,7 @@ static int dax_writeback_one(struct block_device *bdev, } /* Another fsync thread may have already written back this entry */ - if (!radix_tree_tag_get(pages, index, PAGECACHE_TAG_TOWRITE)) + if (!xas_get_tag(&xas, PAGECACHE_TAG_TOWRITE)) goto put_unlocked; /* Lock the entry to serialize with page faults */ entry = lock_slot(&xas); @@ -678,8 +677,8 @@ static int dax_writeback_one(struct block_device *bdev, * at the entry only under xa_lock and once they do that they will * see the entry locked and wait for it to unlock. */ - radix_tree_tag_clear(pages, index, PAGECACHE_TAG_TOWRITE); - xa_unlock_irq(&mapping->pages); + xas_clear_tag(&xas, PAGECACHE_TAG_TOWRITE); + xas_unlock_irq(&xas); /* * Even if dax_writeback_mapping_range() was given a wbc->range_start @@ -717,9 +716,7 @@ static int dax_writeback_one(struct block_device *bdev, * the pfn mappings are writeprotected and fault waits for mapping * entry lock. */ - xa_lock_irq(&mapping->pages); - radix_tree_tag_clear(pages, index, PAGECACHE_TAG_DIRTY); - xa_unlock_irq(&mapping->pages); + xa_clear_tag(&mapping->pages, index, PAGECACHE_TAG_DIRTY); trace_dax_writeback_one(mapping->host, index, size >> PAGE_SHIFT); dax_unlock: dax_read_unlock(id); @@ -728,7 +725,7 @@ static int dax_writeback_one(struct block_device *bdev, put_unlocked: put_unlocked_mapping_entry(&xas, entry2); - xa_unlock_irq(&mapping->pages); + xas_unlock_irq(&xas); return ret; }