btf_type_member
for (i = 0, member = btf_type_member(struct_type); \
member = btf_type_member(vt);
for (i = from, member = btf_type_member(struct_type) + from; \
last_member = btf_type_member(v->t) + v->next_member - 1;
ctx_type = btf_type_member(conv_struct) + bpf_ctx_convert_map[prog_type] * 2;
ctx_type = btf_type_member(conv_struct) + bpf_ctx_convert_map[prog_type] * 2 + 1;
kctx_member = btf_type_member(conv_struct) + bpf_ctx_convert_map[prog_type] * 2 + 1;
member = btf_type_member(t) + vlen - 1;
member = &btf_type_member(t)[member_idx];
m = &btf_type_member(t)[midx];