[PATCH v2 0/4] kconfig: tests: Minor fixes and cleanups for warn_changed_input

[Nicolas Schier <n.schier@fritz.com>]

This patch-set contains two minor fixes and some related cleanup for the
warn_changed_input test:

  * The kconfig test 'warn_changed_input' fails if the environment
    variable KCONFIG_WARN_CHANGED_INPUT is set non-empty.  The first
    patch resets all environment variables with names starting with
    KCONFIG_ by default for all tests to make the kconfig tests more
    stable.

  * The kconfig test framework provides 'olddefconfig' and
    'savedefconfig' wrappers, which fail short when it comes to real
    usage.  The 'warn_changed_input' worked-around by calling the
    framework-internal '_run_conf' function.  The remaining three
    patches extend 'olddefconfig' and 'savedefconfig' wrappers and
    simplify 'warn_changed_input' appropriately.

Signed-off-by: Nicolas Schier <n.schier@fritz.com>
---
Changes in v2:
  * Reset all KCONFIG_* env variables, not just
    KCONFIG_WARN_CHANGED_INPUT (Julian, Nathan)
  * Link to v1: https://patch.msgid.link/20260917-kconfig-tests-minor-updates-v1-0-286e5c985244@fritz.com

To: Nathan Chancellor <nathan@kernel.org>
To: Nicolas Schier <nsc@kernel.org>
To: Julian Braha <julianbraha@gmail.com>
To: Pengpeng Hou <pengpeng@iscas.ac.cn>
To: Ulf Magnusson <ulfalizer@gmail.com>
To: Masahiro Yamada <yamada.masahiro@socionext.com>
Cc: linux-kbuild@vger.kernel.org
Cc: linux-kernel@vger.kernel.org

---
Nicolas Schier (4):
      kconfig: tests: Reset all KCONFIG_* env variables by default
      kconfig: tests: Provide defconfig outfile for savedefconfig
      kconfig: tests: warn_changed_input: Simplify by reusing the extra env
      kconfig: tests: {old,save}defconfig: Forward dynamic keyword arguments

 scripts/kconfig/tests/conftest.py                   | 21 +++++++++++++--------
 .../kconfig/tests/warn_changed_input/__init__.py    | 21 ++++++++-------------
 2 files changed, 21 insertions(+), 21 deletions(-)
---
base-commit: e5e04726cdd043e309677071ab1b65a4b18f422b
change-id: 20260917-kconfig-tests-minor-updates-c0871950c6fa

Best regards,
--  
Nicolas