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[v6,60/99] dax: Convert __dax_invalidate_mapping_entry to XArray

Message ID 20180117202203.19756-61-willy@infradead.org (mailing list archive)
State New, archived
Headers show

Commit Message

Matthew Wilcox (Oracle) Jan. 17, 2018, 8:21 p.m. UTC 
From: Matthew Wilcox <mawilcox@microsoft.com>

Simple now that we already have an xa_state!

Signed-off-by: Matthew Wilcox <mawilcox@microsoft.com>
---
 fs/dax.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)
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Patch

diff --git a/fs/dax.c b/fs/dax.c
index d3fe61b95216..9a30224da4d6 100644
--- a/fs/dax.c
+++ b/fs/dax.c
@@ -413,24 +413,24 @@  static int __dax_invalidate_mapping_entry(struct address_space *mapping,
 	XA_STATE(xas, &mapping->pages, index);
 	int ret = 0;
 	void *entry;
-	struct radix_tree_root *pages = &mapping->pages;
 
 	xa_lock_irq(&mapping->pages);
 	entry = get_unlocked_mapping_entry(&xas);
 	if (!entry || WARN_ON_ONCE(!xa_is_value(entry)))
 		goto out;
 	if (!trunc &&
-	    (radix_tree_tag_get(pages, index, PAGECACHE_TAG_DIRTY) ||
-	     radix_tree_tag_get(pages, index, PAGECACHE_TAG_TOWRITE)))
+	    (xas_get_tag(&xas, PAGECACHE_TAG_DIRTY) ||
+	     xas_get_tag(&xas, PAGECACHE_TAG_TOWRITE)))
 		goto out;
-	radix_tree_delete(pages, index);
+	xas_store(&xas, NULL);
 	mapping->nrexceptional--;
 	ret = 1;
 out:
 	put_unlocked_mapping_entry(&xas, entry);
-	xa_unlock_irq(&mapping->pages);
+	xas_unlock_irq(&xas);
 	return ret;
 }
+
 /*
  * Delete DAX entry at @index from @mapping.  Wait for it
  * to be unlocked before deleting it.