From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: 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 63/99] dax: Convert dax_insert_mapping_entry to XArray Date: Wed, 17 Jan 2018 12:21:27 -0800 Message-Id: <20180117202203.19756-64-willy@infradead.org> In-Reply-To: <20180117202203.19756-1-willy@infradead.org> References: <20180117202203.19756-1-willy@infradead.org> Sender: owner-linux-mm@kvack.org List-ID: 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; } -- 2.15.1 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org