Re: [PATCH 0/3] IRQ_DOMAIN: remove all "depends on", use only "select"

[Randy Dunlap <rdunlap@infradead.org>]

On 2/13/23 00:05, Arnd Bergmann wrote:
> On Mon, Feb 13, 2023, at 05:15, Randy Dunlap wrote:
>> IRQ_DOMAIN is a hidden (not user visible) symbol. Users cannot set
>> it directly thru "make *config", so drivers should select it instead
>> of depending on it if they need it.
>> Relying on it being set for a dependency is risky.
>>
>> Consistently using "select" or "depends on" can also help reduce
>> Kconfig circular dependency issues.
>>
>> IRQ_DOMAIN is selected 109 times and is depended on 3 times in
>> current linux-next. Eliminate the uses of "depends on" by
>> converting them to "select".
>>
>>  [PATCH 1/3] extcon: max8997: select IRQ_DOMAIN instead of depending on it
>>  [PATCH 2/3] of: OF_IRQ: select IRQ_DOMAIN instead of depending on it
>>  [PATCH 3/3] rtc: mt6397: select IRQ_DOMAIN instead of depending on it
> 
> From a Kconfig perspective, your reasoning makes a lot of sense.
> 
> Looking at the bigger picture, I wonder if we should just remove the
> option and make it unconditional. It is enabled in ever architecture
> defconfig other than alpha and sparc, and it's selected by a lot of
> very common options such as I2C,  GENERIC_MSI_IRQ, GENERIC_IRQ_CHIP,
> and PCI_HOST_GENERIC. Enabling the option on Alpha grows the kernel
> image from 9010KB to 9023KB, or on m68k Coldfire from 3346KB to
> 3351KB.

Marc, what do you think about this suggestion?

Thanks.
-- 
~Randy