FETCH_INSN_MAX
code = tmp = kzalloc_objs(*code, FETCH_INSN_MAX);
code[FETCH_INSN_MAX - 1].op = FETCH_OP_END;
ret = parse_probe_arg(arg, parg->type, &code, &code[FETCH_INSN_MAX - 1],
for (; code < tmp + FETCH_INSN_MAX; code++)
for (code = tmp; code < tmp + FETCH_INSN_MAX; code++)