1 files changed, 0 insertions, 9 deletions

diff --git a/fs/btrfs/extent_map.c b/fs/btrfs/extent_map.c
index 71b1ac15535..8a502ee2f23 100644
--- a/fs/btrfs/extent_map.c
+++ b/fs/btrfs/extent_map.c
@@ -42,7 +42,6 @@ void extent_map_exit(void)
 void extent_map_tree_init(struct extent_map_tree *tree, gfp_t mask)
 {
         tree->map.rb_node = NULL;
-        tree->last = NULL;
         spin_lock_init(&tree->lock);
 }
 EXPORT_SYMBOL(extent_map_tree_init);
@@ -239,7 +238,6 @@ int add_extent_mapping(struct extent_map_tree *tree,
                 merge->in_tree = 0;
                 free_extent_map(merge);
         }
-        tree->last = em;
 out:
         return ret;
 }
@@ -273,10 +271,6 @@ struct extent_map *lookup_extent_mapping(struct extent_map_tree *tree,
         u64 end = range_end(start, len);
 
         BUG_ON(spin_trylock(&tree->lock));
-        em = tree->last;
-        if (em && end > em->start && start < extent_map_end(em))
-                goto found;
-
         rb_node = __tree_search(&tree->map, start, &prev, &next);
         if (!rb_node && prev) {
                 em = rb_entry(prev, struct extent_map, rb_node);
@@ -305,7 +299,6 @@ struct extent_map *lookup_extent_mapping(struct extent_map_tree *tree,
 
 found:
         atomic_inc(&em->refs);
-        tree->last = em;
 out:
         return em;
 }
@@ -327,8 +320,6 @@ int remove_extent_mapping(struct extent_map_tree *tree, struct extent_map *em)
         BUG_ON(spin_trylock(&tree->lock));
         rb_erase(&em->rb_node, &tree->map);
         em->in_tree = 0;
-        if (tree->last == em)
-                tree->last = NULL;
         return ret;
 }
 EXPORT_SYMBOL(remove_extent_mapping);