diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index 6083bb38..0db0142 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -33,14 +33,6 @@
 #undef EXT4FS_DEBUG
 
 /*
- * Define EXT4_RESERVATION to reserve data blocks for expanding files
- */
-#define EXT4_DEFAULT_RESERVE_BLOCKS	8
-/*max window size: 1024(direct blocks) + 3([t,d]indirect blocks) */
-#define EXT4_MAX_RESERVE_BLOCKS		1027
-#define EXT4_RESERVE_WINDOW_NOT_ALLOCATED 0
-
-/*
  * Debug code
  */
 #ifdef EXT4FS_DEBUG
@@ -54,8 +46,6 @@
 #define ext4_debug(f, a...)	do {} while (0)
 #endif
 
-#define EXT4_MULTIBLOCK_ALLOCATOR	1
-
 /* prefer goal again. length */
 #define EXT4_MB_HINT_MERGE		1
 /* blocks already reserved */
diff --git a/fs/ext4/ext4_i.h b/fs/ext4/ext4_i.h
index e69acc1..2d516c0a 100644
--- a/fs/ext4/ext4_i.h
+++ b/fs/ext4/ext4_i.h
@@ -33,9 +33,6 @@
 /* data type for block group number */
 typedef unsigned int ext4_group_t;
 
-#define rsv_start rsv_window._rsv_start
-#define rsv_end rsv_window._rsv_end
-
 /*
  * storage for cached extent
  */
diff --git a/fs/ext4/ext4_sb.h b/fs/ext4/ext4_sb.h
index 039b6ea..e318f48 100644
--- a/fs/ext4/ext4_sb.h
+++ b/fs/ext4/ext4_sb.h
@@ -65,10 +65,6 @@
 	struct blockgroup_lock s_blockgroup_lock;
 	struct proc_dir_entry *s_proc;
 
-	/* root of the per fs reservation window tree */
-	spinlock_t s_rsv_window_lock;
-	struct rb_root s_rsv_window_root;
-
 	/* Journaling */
 	struct inode *s_journal_inode;
 	struct journal_s *s_journal;
diff --git a/fs/ext4/mballoc.h b/fs/ext4/mballoc.h
index 10a2921..7acf5ef 100644
--- a/fs/ext4/mballoc.h
+++ b/fs/ext4/mballoc.h
@@ -247,7 +247,6 @@
 
 #define in_range(b, first, len)	((b) >= (first) && (b) <= (first) + (len) - 1)
 
-struct buffer_head *read_block_bitmap(struct super_block *, ext4_group_t);
 static inline ext4_fsblk_t ext4_grp_offs_to_block(struct super_block *sb,
 					struct ext4_free_extent *fex)
 {