+Index: linux-stage/fs/ext4/inode.c
+===================================================================
+--- linux-stage.orig/fs/ext4/inode.c
++++ linux-stage/fs/ext4/inode.c
+@@ -1393,6 +1393,7 @@ int ext4_map_blocks(handle_t *handle, st
+ }
+ return retval;
+ }
++EXPORT_SYMBOL(ext4_map_blocks);
+
+ /* Maximum number of blocks we map for direct IO at once. */
+ #define DIO_MAX_BLOCKS 4096
+@@ -4689,6 +4690,7 @@ out_stop:
+ ext4_journal_stop(handle);
+ trace_ext4_truncate_exit(inode);
+ }
++EXPORT_SYMBOL(ext4_truncate);
+
+ /*
+ * ext4_get_inode_loc returns with an extra refcount against the inode's
+@@ -5102,6 +5104,7 @@ bad_inode: