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[195.23.151.163]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-4b90f11172esm80401145e9.12.2026.11.08.10.59.41 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Sun, 08 Nov 2026 10:59:42 -0800 (PST) Sender: Julian Braha Message-ID: <9729a4c6-22f9-4102-b62f-c76a75488240@gmail.com> Date: Sun, 8 Nov 2026 18:59:41 +0000 X-Mailing-List: linux-doc@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 User-Agent: Mozilla Thunderbird From: Julian Braha Subject: Re: [PATCH v1 03/10] kconfig-checker: Add the configuration checker code To: "Ahmed S. Darwish" , Clark Williams , Steven Rostedt , Ingo Molnar , Nathan Chancellor , Nicolas Schier Cc: Sebastian Andrzej Siewior , Frederic Weisbecker , Greg Kroah-Hartman , Jonathan Corbet , John Ogness , Derek Barbosa , =?UTF-8?Q?Zbigniew_J=C4=99drzejewski-Szmek?= , Daan De Meyer , Luca Boccassi , linux-rt-devel@lists.linux.dev, debian-kernel@lists.debian.org, linux-kbuild@vger.kernel.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, arighi@nvidia.com References: <20261106091922.7560-1-darwi@linutronix.de> <20261106091922.7560-4-darwi@linutronix.de> Content-Language: en-US In-Reply-To: <20261106091922.7560-4-darwi@linutronix.de> Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="------------wygbcu0eB30HJ7r218T0kJHN" This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --------------wygbcu0eB30HJ7r218T0kJHN Content-Type: multipart/mixed; boundary="------------XEeck90arMImjdiitW9iXW07"; protected-headers="v1"; hp="clear" Message-ID: <9729a4c6-22f9-4102-b62f-c76a75488240@gmail.com> Date: Sun, 8 Nov 2026 18:59:41 +0000 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird From: Julian Braha Subject: Re: [PATCH v1 03/10] kconfig-checker: Add the configuration checker code To: "Ahmed S. Darwish" , Clark Williams , Steven Rostedt , Ingo Molnar , Nathan Chancellor , Nicolas Schier Cc: Sebastian Andrzej Siewior , Frederic Weisbecker , Greg Kroah-Hartman , Jonathan Corbet , John Ogness , Derek Barbosa , =?UTF-8?Q?Zbigniew_J=C4=99drzejewski-Szmek?= , Daan De Meyer , Luca Boccassi , linux-rt-devel@lists.linux.dev, debian-kernel@lists.debian.org, linux-kbuild@vger.kernel.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, arighi@nvidia.com References: <20261106091922.7560-1-darwi@linutronix.de> <20261106091922.7560-4-darwi@linutronix.de> Content-Language: en-US In-Reply-To: <20261106091922.7560-4-darwi@linutronix.de> --------------XEeck90arMImjdiitW9iXW07 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable On 11/6/26 09:19, Ahmed S. Darwish wrote: > Introduce a kernel configuration checker. >=20 > Validate the passed kernel .config against a YAML rules file and report= > problematic configuration issues by severity. >=20 > For correctness, readability, and long-term maintainability, type-annot= ate > all the Python code and split the tool's logic into a clean set of clas= ses. >=20 > Create a proper Python objects data model for the kconfig checker to wo= rk > with. Confine all direct YAML dictionary access to YAML files loading,= > validation, and data model construction. >=20 > Document the tool's development rules on top. >=20 > Signed-off-by: Ahmed S. Darwish > --- > tools/kconfig-checker/check.py | 558 +++++++++++++++++++++++++++++++++= > 1 file changed, 558 insertions(+) > create mode 100755 tools/kconfig-checker/check.py >=20 > diff --git a/tools/kconfig-checker/check.py b/tools/kconfig-checker/che= ck.py > new file mode 100755 > index 000000000000..476cd13e59eb > --- /dev/null > +++ b/tools/kconfig-checker/check.py > @@ -0,0 +1,558 @@ > +#!/usr/bin/env python3 > +# > +# SPDX-License-Identifier: GPL-2.0-only > +# > +# Kernel .config checker > +# > +# Main usage: > +# > +# $ check.py list-rules > +# $ check.py check -c path/to/linux/.config -r preempt_rt > +# > +# Notes: > +# > +# - All code is to be fully type-annotated. Before introducing changes= , > +# please verify type-safety using: > +# > +# $ mypy --strict --no-warn-return-any check.py > +# > +# - The minimum required Python version must not be newer than what is= > +# required by the kernel build at Documentation/process/changes.rst.= > +# > +# - The tool must not depend on being run inside the kernel source tre= e. > +# This simplifies invocation, testing and possible future packaging.= > +# > +# - The YAML rule files are only treated as a serialization format. A= fter > +# loading and schema validation, such rules are parsed into an inter= nal > +# data model: Severity, Rule, SymbolRule, PatternRule, Rules, and ot= her > +# related python objects. > +# > +# All checker logic must operate on that typed model, and not on the= raw > +# YAML dictionaries. > +# > +# - Minimize external dependencies: this tool is also intended to be r= un > +# from distribution kernel-package scripts in the future. > +# > +# Script exit codes: > +# > +# os.EX_CONFIG passed kernel .config does not match rules > +# os.EX_NOINPUT input file(s) could not be opened > +# os.EX_DATAERR YAML/schema/rule data is malformed > +# os.EX_UNAVAILABLE Python version or dependency is unavailable > +# > + > +from __future__ import annotations > + > +import argparse > +import os > +import re > +import sys > +import textwrap > + > +from dataclasses import dataclass > +from enum import Enum, auto > +from pathlib import Path > +from typing import Any, NoReturn, Optional > + > +# > +# Initial sanity checks: > +# > + > +def error(message: str, code: int) -> NoReturn: > + print(f'Error: {message}', file=3Dsys.stderr) > + sys.exit(code) > + > +if sys.version_info < (3, 9): > + error('Python 3.9 or later is required', os.EX_UNAVAILABLE) > + > +try: > + import jsonschema # type: ignore > + import yaml as yaml_m # type: ignore > +except ModuleNotFoundError as e: > + error(f'Missing Python module: {e.name}', os.EX_UNAVAILABLE) > + > +# > +# Actual script: > +# > + > +class KernelConfig: > + """.config file parser""" > + > + def __init__(self, file: Path): > + try: > + self.lines =3D file.read_text().splitlines() > + except OSError as e: > + error(f'Could not open {file}: {e.strerror}', os.EX_NOINPU= T) > + > + self.symbols =3D self._parse_symbols() > + > + def _parse_symbols(self) -> dict[str, str]: > + """Extract CONFIG_* symbol assignments from .config""" > + symbol_set =3D re.compile(r'^(CONFIG_[A-Za-z0-9_]+)=3D([ym])$'= ) > + symbol_unset =3D re.compile(r'^# (CONFIG_[A-Za-z0-9_]+) is not= set$') What does this do for Kconfig's int, hex, and string options? - Julian Braha --------------XEeck90arMImjdiitW9iXW07-- --------------wygbcu0eB30HJ7r218T0kJHN Content-Type: application/pgp-signature; name="OpenPGP_signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="OpenPGP_signature.asc" -----BEGIN PGP SIGNATURE----- wnsEABYIACMWIQT6qjll++tIFxF8TUPElYPCBXNxIAUCavDGnQUDAAAAAAAKCRDElYPCBXNxILlL AQChbcKlonSXUa3TJuKdVVP0T/VTxOqGsEjOelartYR2RgEAyBM2bZtsfxLzLDLge3f2Jazt2mRu u+hzj/qSZNHDuQ0= =BT3m -----END PGP SIGNATURE----- --------------wygbcu0eB30HJ7r218T0kJHN--