1 files changed, 1 insertions, 1 deletions

diff --git a/fs/btrfs/extent_io.h b/fs/btrfs/extent_io.h
index ff182322d112..dc81868d975a 100644
--- a/fs/btrfs/extent_io.h
+++ b/fs/btrfs/extent_io.h
@@ -72,7 +72,7 @@ struct extent_io_ops {
         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,
+        int (*merge_bio_hook)(int rw, struct page *page, unsigned long offset,
                               size_t size, struct bio *bio,
                               unsigned long bio_flags);
         int (*readpage_io_failed_hook)(struct page *page, int failed_mirror);