btrfs_set_super_generation(&super, 1);
btrfs_set_super_root(&super, cfg->blocks[MKFS_ROOT_TREE]);
btrfs_set_super_chunk_root(&super, cfg->blocks[MKFS_CHUNK_TREE]);
btrfs_set_super_generation(&super, 1);
btrfs_set_super_root(&super, cfg->blocks[MKFS_ROOT_TREE]);
btrfs_set_super_chunk_root(&super, cfg->blocks[MKFS_CHUNK_TREE]);