1 files changed, 12 insertions, 1 deletions

diff --git a/fs/ext4/extents_status.h b/fs/ext4/extents_status.h
index f1b62a419920..efd5f970b501 100644
--- a/fs/ext4/extents_status.h
+++ b/fs/ext4/extents_status.h
@@ -64,6 +64,17 @@ struct ext4_es_tree {
         struct extent_status *cache_es; /* recently accessed extent */
 };
 
+struct ext4_es_stats {
+        unsigned long es_stats_last_sorted;
+        unsigned long es_stats_shrunk;
+        unsigned long es_stats_cache_hits;
+        unsigned long es_stats_cache_misses;
+        u64 es_stats_scan_time;
+        u64 es_stats_max_scan_time;
+        struct percpu_counter es_stats_all_cnt;
+        struct percpu_counter es_stats_lru_cnt;
+};
+
 extern int __init ext4_init_es(void);
 extern void ext4_exit_es(void);
 extern void ext4_es_init_tree(struct ext4_es_tree *tree);
@@ -138,7 +149,7 @@ static inline void ext4_es_store_pblock_status(struct extent_status *es,
                        (pb & ~ES_MASK));
 }
 
-extern void ext4_es_register_shrinker(struct ext4_sb_info *sbi);
+extern int ext4_es_register_shrinker(struct ext4_sb_info *sbi);
 extern void ext4_es_unregister_shrinker(struct ext4_sb_info *sbi);
 extern void ext4_es_lru_add(struct inode *inode);
 extern void ext4_es_lru_del(struct inode *inode);