1 files changed, 1 insertions, 0 deletions

diff --git a/fs/btrfs/extent_io.h b/fs/btrfs/extent_io.h
index 2268a7995896..23affd27af5e 100644
--- a/fs/btrfs/extent_io.h
+++ b/fs/btrfs/extent_io.h
@@ -30,6 +30,7 @@ typedef	int (extent_submit_bio_hook_t)(struct inode *inode, int rw,
                                        struct bio *bio, int mirror_num);
 struct extent_io_ops {
         int (*fill_delalloc)(struct inode *inode, u64 start, u64 end);
+        int (*writepage_start_hook)(struct page *page, u64 start, u64 end);
         int (*writepage_io_hook)(struct page *page, u64 start, u64 end);
         extent_submit_bio_hook_t *submit_bio_hook;
         int (*merge_bio_hook)(struct page *page, unsigned long offset,