[PATCH v1 2/3] kconfig: Ask user if string needs to be changed when dependency changed
boris at codesynthesis.com
Mon Feb 15 14:13:28 UTC 2021
Mickaël Salaün <mic at digikod.net> writes:
> Content of string configuration may depend on related kernel
> configurations. Modify oldconfig and syncconfig to inform users about
> possible required configuration update and give them the opportunity to
> update it:
> * if dependencies of this string has changed (e.g. enabled or disabled),
> * and if the current value of this string is different than the (new)
> default one.
I have a number of questions:
1. Why is a change in dependencies necessarily means that the dependent's
value must be revised? Here is a specific example (to make sure we are
talking about the same things):
string "Foo value"
depends on BAR || BAZ
Why, in the general case, when I disable BAR and enable BAZ I must
also revise the value of FOO?
2. How do you know that what's in the user's .config is the old default
and in Kconfig -- the new default value? What if in the user's .config
is a custom value (with which the user is perfectly happy) and what's
in Kconfig is the old default (which the user has already seen)?
3. Why limit this to strings only?
> This is particularly relevant for CONFIG_LSM which contains a list of
> LSMs enabled at boot, but users will not have a chance to update this
> list with a make oldconfig.
If my understanding above is correct, this feels like it's been purpose-
made to address whatever issue you are having with CONFIG_LSM. If so,
what about potential numerous other options that don't have this issue
but will now be presented to the user for modification?
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