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-rw-r--r--fs/btrfs/extent_map.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/fs/btrfs/extent_map.h b/fs/btrfs/extent_map.h
index f0a645a14d6e..e7fd8a56a140 100644
--- a/fs/btrfs/extent_map.h
+++ b/fs/btrfs/extent_map.h
@@ -68,6 +68,10 @@ struct extent_map *lookup_extent_mapping(struct extent_map_tree *tree,
int add_extent_mapping(struct extent_map_tree *tree,
struct extent_map *em, int modified);
int remove_extent_mapping(struct extent_map_tree *tree, struct extent_map *em);
+void replace_extent_mapping(struct extent_map_tree *tree,
+ struct extent_map *cur,
+ struct extent_map *new,
+ int modified);
struct extent_map *alloc_extent_map(void);
void free_extent_map(struct extent_map *em);