--- zzzz-none-000/linux-4.4.60/fs/f2fs/f2fs.h	2017-04-08 07:53:53.000000000 +0000
+++ jet-2400-727/linux-4.4.60/fs/f2fs/f2fs.h	2021-03-17 14:36:41.000000000 +0000
@@ -1715,6 +1715,7 @@
  * super.c
  */
 int f2fs_commit_super(struct f2fs_sb_info *, bool);
+loff_t max_file_size(unsigned bits);
 int f2fs_sync_fs(struct super_block *, int);
 extern __printf(3, 4)
 void f2fs_msg(struct super_block *, const char *, const char *, ...);