From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753618AbdLFAnV (ORCPT ); Tue, 5 Dec 2017 19:43:21 -0500 Received: from bombadil.infradead.org ([65.50.211.133]:46116 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753393AbdLFAmR (ORCPT ); Tue, 5 Dec 2017 19:42:17 -0500 From: Matthew Wilcox Cc: Matthew Wilcox , Ross Zwisler , Jens Axboe , Rehas Sachdeva , 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, linux-kernel@vger.kernel.org Subject: [PATCH v4 61/73] dax: Convert dax_writeback_one to XArray Date: Tue, 5 Dec 2017 16:41:47 -0800 Message-Id: <20171206004159.3755-62-willy@infradead.org> X-Mailer: git-send-email 2.9.5 In-Reply-To: <20171206004159.3755-1-willy@infradead.org> References: <20171206004159.3755-1-willy@infradead.org> To: unlisted-recipients:; (no To-header on input) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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 66f6c4ea18f7..7bd94f1b61d0 100644 --- a/fs/dax.c +++ b/fs/dax.c @@ -633,8 +633,7 @@ 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; @@ -649,7 +648,7 @@ 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))) @@ -668,7 +667,7 @@ 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); @@ -679,8 +678,8 @@ 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 @@ -718,9 +717,7 @@ 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); @@ -729,7 +726,7 @@ 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; } -- 2.15.0