btf_field_iter_init
int btf_field_iter_init(struct btf_field_iter *it, struct btf_type *t,
err = btf_field_iter_init(&it, btf_type, BTF_FIELD_ITER_IDS);
err = btf_field_iter_init(&it, t, BTF_FIELD_ITER_STRS);
err = btf_field_iter_init(&it, t, BTF_FIELD_ITER_STRS);
err = btf_field_iter_init(&it, t, BTF_FIELD_ITER_IDS);
r = btf_field_iter_init(&it, t, BTF_FIELD_ITER_STRS);
r = btf_field_iter_init(&it, t, BTF_FIELD_ITER_IDS);
err = btf_field_iter_init(&it, split_t, BTF_FIELD_ITER_IDS);
err = btf_field_iter_init(&it, t, BTF_FIELD_ITER_IDS);
err = btf_field_iter_init(&it, nt, BTF_FIELD_ITER_IDS);
err = btf_field_iter_init(&it, t, BTF_FIELD_ITER_IDS);
err = btf_field_iter_init(&it, t, BTF_FIELD_ITER_STRS);
err = btf_field_iter_init(&it, t, BTF_FIELD_ITER_IDS);
int btf_field_iter_init(struct btf_field_iter *it, struct btf_type *t, enum btf_field_iter_kind iter_kind);
err = btf_field_iter_init(&it, t, BTF_FIELD_ITER_IDS);
err = btf_field_iter_init(&it, t, BTF_FIELD_ITER_STRS);
err = btf_field_iter_init(&it, dst_t, BTF_FIELD_ITER_IDS);
if (!ASSERT_OK(btf_field_iter_init(&it_strs, t, BTF_FIELD_ITER_STRS),
if (!ASSERT_OK(btf_field_iter_init(&it_ids, t, BTF_FIELD_ITER_IDS),