Btrfs: Add writepages support

Signed-off-by: Chris Mason <chris.mason@oracle.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/fs/btrfs/extent_map.h b/fs/btrfs/extent_map.h
index b6f6519f9ba3..0b0dcf19fe45 100644
--- a/fs/btrfs/extent_map.h
+++ b/fs/btrfs/extent_map.h
@@ -136,6 +136,10 @@ int extent_invalidatepage(struct extent_map_tree *tree,
 int extent_write_full_page(struct extent_map_tree *tree, struct page *page,
                           get_extent_t *get_extent,
                           struct writeback_control *wbc);
+int extent_writepages(struct extent_map_tree *tree,
+                      struct address_space *mapping,
+                      get_extent_t *get_extent,
+                      struct writeback_control *wbc);
 int extent_prepare_write(struct extent_map_tree *tree,
                          struct inode *inode, struct page *page,
                          unsigned from, unsigned to, get_extent_t *get_extent);