diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index 8de34ab..da5bc7d 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -1581,6 +1581,7 @@
  */
 struct page *grab_meta_page(struct f2fs_sb_info *, pgoff_t);
 struct page *get_meta_page(struct f2fs_sb_info *, pgoff_t);
+bool is_valid_blkaddr(struct f2fs_sb_info *, block_t, int);
 int ra_meta_pages(struct f2fs_sb_info *, block_t, int, int);
 void ra_meta_pages_cond(struct f2fs_sb_info *, pgoff_t);
 long sync_meta_pages(struct f2fs_sb_info *, enum page_type, long);