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Received: from willy by bombadil.infradead.org with local (Exim 4.89 #1 (Red Hat Linux)) id 1ebuEV-00065x-IV; Wed, 17 Jan 2018 20:22:51 +0000 From: Matthew Wilcox To: linux-kernel@vger.kernel.org Date: Wed, 17 Jan 2018 12:21:27 -0800 Message-Id: <20180117202203.19756-64-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> Cc: linux-s390@vger.kernel.org, David Howells , linux-nilfs@vger.kernel.org, Matthew Wilcox , linux-sh@vger.kernel.org, intel-gfx@lists.freedesktop.org, linux-usb@vger.kernel.org, linux-remoteproc@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, linux-xfs@vger.kernel.org, linux-mm@kvack.org, iommu@lists.linux-foundation.org, Stefano Stabellini , linux-fsdevel@vger.kernel.org, cgroups@vger.kernel.org, Bjorn Andersson , linux-btrfs@vger.kernel.org Subject: [Intel-gfx] [PATCH v6 63/99] dax: Convert dax_insert_mapping_entry to XArray X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" X-Virus-Scanned: ClamAV using ClamSMTP From: Matthew Wilcox Signed-off-by: Matthew Wilcox --- fs/dax.c | 18 ++++++------------ 1 file changed, 6 insertions(+), 12 deletions(-) diff --git a/fs/dax.c b/fs/dax.c index e6b25ef112f2..494e8fb7a98f 100644 --- a/fs/dax.c +++ b/fs/dax.c @@ -498,9 +498,9 @@ static void *dax_insert_mapping_entry(struct address_space *mapping, void *entry, sector_t sector, unsigned long flags, bool dirty) { - struct radix_tree_root *pages = &mapping->pages; void *new_entry; pgoff_t index = vmf->pgoff; + XA_STATE(xas, &mapping->pages, index); if (dirty) __mark_inode_dirty(mapping->host, I_DIRTY_PAGES); @@ -516,7 +516,7 @@ static void *dax_insert_mapping_entry(struct address_space *mapping, PAGE_SIZE, 0); } - xa_lock_irq(&mapping->pages); + xas_lock_irq(&xas); new_entry = dax_radix_locked_entry(sector, flags); if (dax_is_zero_entry(entry) || dax_is_empty_entry(entry)) { @@ -528,21 +528,15 @@ static void *dax_insert_mapping_entry(struct address_space *mapping, * existing entry is a PMD, we will just leave the PMD in the * tree and dirty it if necessary. */ - struct radix_tree_node *node; - void **slot; - void *ret; - - ret = __radix_tree_lookup(pages, index, &node, &slot); - WARN_ON_ONCE(ret != entry); - __radix_tree_replace(pages, node, slot, - new_entry, NULL); + void *prev = xas_store(&xas, new_entry); + WARN_ON_ONCE(prev != entry); entry = new_entry; } if (dirty) - radix_tree_tag_set(pages, index, PAGECACHE_TAG_DIRTY); + xas_set_tag(&xas, PAGECACHE_TAG_DIRTY); - xa_unlock_irq(&mapping->pages); + xas_unlock_irq(&xas); return entry; }