detach_target
rc = detach_target(cxlr, pos);
detach_target(cxlr, i);
bpf_iter_detach_target_t detach_target;
if (iter_link->tinfo->reg_info->detach_target)
iter_link->tinfo->reg_info->detach_target(&iter_link->aux);
.detach_target = bpf_iter_detach_cgroup,
.detach_target = bpf_iter_detach_map,
.detach_target = bpf_iter_detach_map,
.detach_target = sock_map_iter_detach_target,