btrfs_set_header_level(&split->header, btrfs_header_level(&c->header));
btrfs_set_header_blocknr(&split->header, split_buffer->blocknr);
btrfs_set_header_owner(&split->header, root->root_key.objectid);
btrfs_set_header_level(&split->header, btrfs_header_level(&c->header));
btrfs_set_header_blocknr(&split->header, split_buffer->blocknr);
btrfs_set_header_owner(&split->header, root->root_key.objectid);