diff --git a/fs/btrfs/bit-radix.c b/fs/btrfs/bit-radix.c
index a50a1c4..783f54c 100644
--- a/fs/btrfs/bit-radix.c
+++ b/fs/btrfs/bit-radix.c
@@ -62,7 +62,6 @@
 	if (!bits)
 		return 0;
 	clear_bit(bit_slot, bits + 1);
-#if 0
 	for (i = 1; i < BIT_ARRAY_BYTES / sizeof(unsigned long); i++) {
 		if (bits[i]) {
 			empty = 0;
@@ -74,7 +73,6 @@
 		BUG_ON(!bits);
 		kmem_cache_free(btrfs_bit_radix_cachep, bits);
 	}
-#endif
 	return 0;
 }
 
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 2dbd550..a227e94 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -23,8 +23,6 @@
 
 struct buffer_head *btrfs_find_tree_block(struct btrfs_root *root, u64 blocknr)
 {
-	return sb_find_get_block(root->fs_info->sb, blocknr);
-#if 0
 	struct address_space *mapping = root->fs_info->btree_inode->i_mapping;
 	int blockbits = root->fs_info->sb->s_blocksize_bits;
 	unsigned long index = blocknr >> (PAGE_CACHE_SHIFT - blockbits);
@@ -58,14 +56,11 @@
 	}
 	page_cache_release(page);
 	return ret;
-#endif
 }
 
 struct buffer_head *btrfs_find_create_tree_block(struct btrfs_root *root,
 						 u64 blocknr)
 {
-	return sb_getblk(root->fs_info->sb, blocknr);
-#if 0
 	struct address_space *mapping = root->fs_info->btree_inode->i_mapping;
 	int blockbits = root->fs_info->sb->s_blocksize_bits;
 	unsigned long index = blocknr >> (PAGE_CACHE_SHIFT - blockbits);
@@ -103,7 +98,6 @@
 		touch_buffer(ret);
 	page_cache_release(page);
 	return ret;
-#endif
 }
 
 static sector_t max_block(struct block_device *bdev)
@@ -186,7 +180,6 @@
 
 static int btree_writepage(struct page *page, struct writeback_control *wbc)
 {
-#if 0
 	struct buffer_head *bh;
 	struct btrfs_root *root = btrfs_sb(page->mapping->host->i_sb);
 	struct buffer_head *head;
@@ -201,7 +194,6 @@
 			csum_tree_block(root, bh, 0);
 		bh = bh->b_this_page;
 	} while (bh != head);
-#endif
 	return block_write_full_page(page, btree_get_block, wbc);
 }
 
@@ -218,8 +210,6 @@
 
 struct buffer_head *read_tree_block(struct btrfs_root *root, u64 blocknr)
 {
-	return sb_bread(root->fs_info->sb, blocknr);
-#if 0
 	struct buffer_head *bh = NULL;
 
 	bh = btrfs_find_create_tree_block(root, blocknr);
@@ -243,8 +233,6 @@
 fail:
 	brelse(bh);
 	return NULL;
-
-#endif
 }
 
 int dirty_tree_block(struct btrfs_trans_handle *trans, struct btrfs_root *root,
@@ -323,8 +311,6 @@
 	fs_info->last_inode_alloc = 0;
 	fs_info->last_inode_alloc_dirid = 0;
 	fs_info->sb = sb;
-	fs_info->btree_inode = NULL;
-#if 0
 	fs_info->btree_inode = new_inode(sb);
 	fs_info->btree_inode->i_ino = 1;
 	fs_info->btree_inode->i_nlink = 1;
@@ -332,7 +318,6 @@
 	fs_info->btree_inode->i_mapping->a_ops = &btree_aops;
 	insert_inode_hash(fs_info->btree_inode);
 	mapping_set_gfp_mask(fs_info->btree_inode->i_mapping, GFP_NOFS);
-#endif
 	fs_info->hash_tfm = crypto_alloc_hash("sha256", 0, CRYPTO_ALG_ASYNC);
 	spin_lock_init(&fs_info->hash_lock);
 	if (!fs_info->hash_tfm || IS_ERR(fs_info->hash_tfm)) {
@@ -435,8 +420,8 @@
 	btrfs_block_release(root, root->commit_root);
 	btrfs_block_release(root, root->fs_info->sb_buffer);
 	crypto_free_hash(root->fs_info->hash_tfm);
-	// truncate_inode_pages(root->fs_info->btree_inode->i_mapping, 0);
-	// iput(root->fs_info->btree_inode);
+	truncate_inode_pages(root->fs_info->btree_inode->i_mapping, 0);
+	iput(root->fs_info->btree_inode);
 	kfree(root->fs_info->extent_root);
 	kfree(root->fs_info->inode_root);
 	kfree(root->fs_info->tree_root);
@@ -447,6 +432,6 @@
 
 void btrfs_block_release(struct btrfs_root *root, struct buffer_head *buf)
 {
-	// brelse(buf);
+	brelse(buf);
 }
 
diff --git a/fs/btrfs/inode-map.c b/fs/btrfs/inode-map.c
index fa4adb8..b3de823 100644
--- a/fs/btrfs/inode-map.c
+++ b/fs/btrfs/inode-map.c
@@ -10,7 +10,7 @@
 			     struct btrfs_root *fs_root,
 			     u64 dirid, u64 *objectid)
 {
-	struct btrfs_path path;
+	struct btrfs_path *path;
 	struct btrfs_key key;
 	int ret;
 	u64 hole_size = 0;
@@ -31,20 +31,22 @@
 	btrfs_set_key_type(&search_key, BTRFS_INODE_MAP_ITEM_KEY);
 	search_key.offset = 0;
 
-	btrfs_init_path(&path);
+	path = btrfs_alloc_path();
+	BUG_ON(!path);
+	btrfs_init_path(path);
 	start_found = 0;
-	ret = btrfs_search_slot(trans, root, &search_key, &path, 0, 0);
+	ret = btrfs_search_slot(trans, root, &search_key, path, 0, 0);
 	if (ret < 0)
 		goto error;
 
-	if (path.slots[0] > 0)
-		path.slots[0]--;
+	if (path->slots[0] > 0)
+		path->slots[0]--;
 
 	while (1) {
-		l = btrfs_buffer_leaf(path.nodes[0]);
-		slot = path.slots[0];
+		l = btrfs_buffer_leaf(path->nodes[0]);
+		slot = path->slots[0];
 		if (slot >= btrfs_header_nritems(&l->header)) {
-			ret = btrfs_next_leaf(root, &path);
+			ret = btrfs_next_leaf(root, path);
 			if (ret == 0)
 				continue;
 			if (ret < 0)
@@ -72,17 +74,19 @@
 		}
 		start_found = 1;
 		last_ino = key.objectid + 1;
-		path.slots[0]++;
+		path->slots[0]++;
 	}
 	// FIXME -ENOSPC
 found:
 	root->fs_info->last_inode_alloc = *objectid;
 	root->fs_info->last_inode_alloc_dirid = dirid;
-	btrfs_release_path(root, &path);
+	btrfs_release_path(root, path);
+	btrfs_free_path(path);
 	BUG_ON(*objectid < search_start);
 	return 0;
 error:
-	btrfs_release_path(root, &path);
+	btrfs_release_path(root, path);
+	btrfs_free_path(path);
 	return ret;
 }
 
@@ -91,7 +95,7 @@
 			   u64 objectid, struct btrfs_key *location)
 {
 	int ret = 0;
-	struct btrfs_path path;
+	struct btrfs_path *path;
 	struct btrfs_inode_map_item *inode_item;
 	struct btrfs_key key;
 	struct btrfs_root *inode_root = fs_root->fs_info->inode_root;
@@ -100,18 +104,21 @@
 	key.flags = 0;
 	btrfs_set_key_type(&key, BTRFS_INODE_MAP_ITEM_KEY);
 	key.offset = 0;
-	btrfs_init_path(&path);
-	ret = btrfs_insert_empty_item(trans, inode_root, &path, &key,
+	path = btrfs_alloc_path();
+	BUG_ON(!path);
+	btrfs_init_path(path);
+	ret = btrfs_insert_empty_item(trans, inode_root, path, &key,
 				      sizeof(struct btrfs_inode_map_item));
 	if (ret)
 		goto out;
 
-	inode_item = btrfs_item_ptr(btrfs_buffer_leaf(path.nodes[0]),
-				    path.slots[0], struct btrfs_inode_map_item);
+	inode_item = btrfs_item_ptr(btrfs_buffer_leaf(path->nodes[0]),
+				    path->slots[0], struct btrfs_inode_map_item);
 	btrfs_cpu_key_to_disk(&inode_item->key, location);
-	btrfs_mark_buffer_dirty(path.nodes[0]);
+	btrfs_mark_buffer_dirty(path->nodes[0]);
 out:
-	btrfs_release_path(inode_root, &path);
+	btrfs_release_path(inode_root, path);
+	btrfs_free_path(path);
 	return ret;
 }
 
diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index c260fca..9fd87f5 100644
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -49,6 +49,7 @@
 	ret = btrfs_lookup_inode(NULL, root, path, inode->i_ino, 0);
 	if (ret) {
 		btrfs_release_path(root, path);
+		btrfs_free_path(path);
 		mutex_unlock(&root->fs_info->fs_mutex);
 		make_bad_inode(inode);
 		return;
@@ -215,7 +216,6 @@
 		goto out;
 	}
 	btrfs_release_path(root, path);
-	btrfs_free_path(path);
 
 	/* now the directory is empty */
 	err = btrfs_unlink_trans(trans, root, dir, dentry);
@@ -223,6 +223,8 @@
 		inode->i_size = 0;
 	}
 out:
+	btrfs_release_path(root, path);
+	btrfs_free_path(path);
 	mutex_unlock(&root->fs_info->fs_mutex);
 	ret = btrfs_end_transaction(trans, root);
 	if (ret && !err)
@@ -800,11 +802,10 @@
 
 	sb->s_dirt = 0;
 	if (!wait) {
-		// filemap_flush(root->fs_info->btree_inode->i_mapping);
-		filemap_flush(root->fs_info->sb->s_bdev->bd_inode->i_mapping);
+		filemap_flush(root->fs_info->btree_inode->i_mapping);
 		return 0;
 	}
-	filemap_write_and_wait(root->fs_info->sb->s_bdev->bd_inode->i_mapping);
+	filemap_write_and_wait(root->fs_info->btree_inode->i_mapping);
 	mutex_lock(&root->fs_info->fs_mutex);
 	trans = btrfs_start_transaction(root, 1);
 	ret = btrfs_commit_transaction(trans, root);
diff --git a/fs/btrfs/transaction.c b/fs/btrfs/transaction.c
index 72b52e1..2b0f98c 100644
--- a/fs/btrfs/transaction.c
+++ b/fs/btrfs/transaction.c
@@ -88,7 +88,7 @@
 int btrfs_write_and_wait_transaction(struct btrfs_trans_handle *trans,
 				     struct btrfs_root *root)
 {
-	filemap_write_and_wait(root->fs_info->sb->s_bdev->bd_inode->i_mapping);
+	filemap_write_and_wait(root->fs_info->btree_inode->i_mapping);
 	return 0;
 }