diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index e6d80325718d..2a7e254cbae3 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -2837,8 +2837,6 @@ int ext4_fc_record_regions(struct super_block *sb, int ino,
 /* mballoc.c */
 extern const struct seq_operations ext4_mb_seq_groups_ops;
 extern const struct seq_operations ext4_mb_seq_structs_summary_ops;
-extern long ext4_mb_stats;
-extern long ext4_mb_max_to_scan;
 extern int ext4_seq_mb_stats_show(struct seq_file *seq, void *offset);
 extern int ext4_mb_init(struct super_block *);
 extern int ext4_mb_release(struct super_block *);
diff --git a/fs/ext4/mballoc.h b/fs/ext4/mballoc.h
index 6d85ee8674a6..24b666e558f1 100644
--- a/fs/ext4/mballoc.h
+++ b/fs/ext4/mballoc.h
@@ -49,7 +49,7 @@
 #define MB_DEFAULT_MIN_TO_SCAN		10
 
 /*
- * with 'ext4_mb_stats' allocator will collect stats that will be
+ * with 's_mb_stats' allocator will collect stats that will be
  * shown at umount. The collecting costs though!
  */
 #define MB_DEFAULT_STATS		0