diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index be9d7c6124890e484a4d1b34145b197d243c827c..8123b03b1f9dc43d0a6623e1eaffaa52481f6871 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -1086,7 +1086,7 @@ void readahead_tree_block(struct btrfs_root *root, u64 bytenr)
 	free_extent_buffer(buf);
 }
 
-int reada_tree_block_flagged(struct btrfs_root *root, u64 bytenr, u32 blocksize,
+int reada_tree_block_flagged(struct btrfs_root *root, u64 bytenr,
 			 int mirror_num, struct extent_buffer **eb)
 {
 	struct extent_buffer *buf = NULL;
@@ -1094,7 +1094,7 @@ int reada_tree_block_flagged(struct btrfs_root *root, u64 bytenr, u32 blocksize,
 	struct extent_io_tree *io_tree = &BTRFS_I(btree_inode)->io_tree;
 	int ret;
 
-	buf = btrfs_find_create_tree_block(root, bytenr, blocksize);
+	buf = btrfs_find_create_tree_block(root, bytenr, root->nodesize);
 	if (!buf)
 		return 0;
 
diff --git a/fs/btrfs/disk-io.h b/fs/btrfs/disk-io.h
index 9cf4359ace057e30148d160baf7f110efc56982c..4d4ecdd9f4a262233ab0e3d8a7d74f2a59849800 100644
--- a/fs/btrfs/disk-io.h
+++ b/fs/btrfs/disk-io.h
@@ -47,7 +47,7 @@ struct btrfs_fs_devices;
 struct extent_buffer *read_tree_block(struct btrfs_root *root, u64 bytenr,
 				      u64 parent_transid);
 void readahead_tree_block(struct btrfs_root *root, u64 bytenr);
-int reada_tree_block_flagged(struct btrfs_root *root, u64 bytenr, u32 blocksize,
+int reada_tree_block_flagged(struct btrfs_root *root, u64 bytenr,
 			 int mirror_num, struct extent_buffer **eb);
 struct extent_buffer *btrfs_find_create_tree_block(struct btrfs_root *root,
 						   u64 bytenr, u32 blocksize);
diff --git a/fs/btrfs/reada.c b/fs/btrfs/reada.c
index 5c3fde6571bb2f02d1758530d0f0984dbdde0833..4d3d4e5287c52e2c8e6cf92ee510c2680407cddd 100644
--- a/fs/btrfs/reada.c
+++ b/fs/btrfs/reada.c
@@ -721,7 +721,7 @@ static int reada_start_machine_dev(struct btrfs_fs_info *fs_info,
 
 	atomic_inc(&dev->reada_in_flight);
 	ret = reada_tree_block_flagged(fs_info->extent_root, logical,
-			fs_info->tree_root->nodesize, mirror_num, &eb);
+			mirror_num, &eb);
 	if (ret)
 		__readahead_hook(fs_info->extent_root, NULL, logical, ret);
 	else if (eb)