Re: [PATCH v2 5/5] kconfig: use unsigned integers for hex range checks

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

On Tue, Sep 15, 2026 at 10:15:08PM +0100, Julian Braha wrote:
> While 'hex' values should use the bounds of 64-bit unsigned integers, the
> range values are treated as signed (checks use strtoll).
> 
> For example:
> 
>   config HEX_RANGE
>     hex
>     range 0 0xfffffffffffffffe
>     default 0xffffffffffffffff
> 
> the default value should adjust down to the upper bound of
> 0xfffffffffffffffe, but since the check incorrectly parses both as
> LLONG_MAX, the value stays at the out-of-range default of
> 0xffffffffffffffff.
> 
> To fix this, let's use a union of signed and unsigned integers to
> represent both 'int' and 'hex' range values, then use both strtoll and
> strtoull where appropriate.
> 
> Assisted-by: LLM
> Signed-off-by: Julian Braha <julianbraha@gmail.com>
> ---
>  scripts/kconfig/symbol.c                      | 41 ++++++++++++++-----
>  .../kconfig/tests/warn_changed_input/Kconfig  |  5 +++
>  .../tests/warn_changed_input/expected_config  |  1 +
>  3 files changed, 36 insertions(+), 11 deletions(-)
> 

Thanks for the whole patch-set, I appreciate your clean-up and 
strengthening of kconfig!

Reviewed-by: Nicolas Schier <n.schier@fritz.com>

Kind regards,
Nicolas