RBT_INITIALIZER
struct leaktree leaks = RBT_INITIALIZER(&leaks);
struct tree root = RBT_INITIALIZER(&root);
struct bio_mappings bios = RBT_INITIALIZER();
struct kstat_id_tree kstat_id_tree = RBT_INITIALIZER();
struct kstat_pv_tree kstat_pv_tree = RBT_INITIALIZER();
struct kstat_nm_tree kstat_nm_tree = RBT_INITIALIZER();
static struct bpe_tree bpe_interfaces = RBT_INITIALIZER();
struct mgre_tree mgre_tree = RBT_INITIALIZER();
struct egre_tree egre_tree = RBT_INITIALIZER();
struct nvgre_ucast_tree nvgre_ucast_tree = RBT_INITIALIZER();
struct nvgre_mcast_tree nvgre_mcast_tree = RBT_INITIALIZER();
struct eoip_tree eoip_tree = RBT_INITIALIZER();
struct erspan_tree erspan_tree = RBT_INITIALIZER();
RBT_HEAD(pppx_ifs, pppx_if) pppx_ifs = RBT_INITIALIZER(&pppx_ifs); /* [N] */
RBT_INITIALIZER(pf_statelim_id_tree_active);
RBT_INITIALIZER(pf_statelim_id_tree_inactive);
RBT_INITIALIZER(pf_statelim_nm_tree_inactive);
RBT_INITIALIZER(pf_sourcelim_id_tree_active);
RBT_INITIALIZER(pf_sourcelim_id_tree_inactive);
RBT_INITIALIZER(pf_sourcelim_nm_tree_inactive);
struct kstat_tree kt = RBT_INITIALIZER();
.ifaces = RBT_INITIALIZER(_lldpd.ifaces),