btf_obj_id
return ((u64)btf_obj_id(btf) << 32) | 0x80000000 | btf_id;
u32 btf_obj_id(const struct btf *btf);
info->btf_vmlinux_id = btf_obj_id(st_map->btf);
info.btf_id = btf_obj_id(prog->aux->btf);
info.attach_btf_obj_id = btf_obj_id(attach_btf);
info.btf_id = btf_obj_id(map->btf);