-January 2038. For inodes that are not linked from any directory but are
-still open (orphan inodes), the dtime field is overloaded for use with
-the orphan list. The superblock field ``s_last_orphan`` points to the
-first inode in the orphan list; dtime is then the number of the next
-orphaned inode, or zero if there are no more orphans.
+January 2038. If the filesystem does not have orphan_file feature, inodes
+that are not linked from any directory but are still open (orphan inodes) have
+the dtime field overloaded for use with the orphan list. The superblock field
+``s_last_orphan`` points to the first inode in the orphan list; dtime is then
+the number of the next orphaned inode, or zero if there are no more orphans.