code conditional on non-existing PPC_EARLY_DEBUG_MICROWATT.

[Michael Ellerman]

Christophe Leroy <christophe.leroy at csgroup.eu> writes:
> Le 23/12/2021 à 11:21, Lukas Bulwahn a écrit :
>> Dear Benjamin, dear Paul, dear Michael,
>> 
>> with commit 48b545b8018d ("powerpc/microwatt: Use standard 16550 UART
>> for console"), you have some code in arch/powerpc/kernel/udbg_16550.c,
>> conditional on the Kconfig symbol PPC_EARLY_DEBUG_MICROWATT. However,
>> since then, the definition of this Kconfig symbol was never introduced
>> to the mainline repository or current linux-next, nor am I finding any
>> pending patch for that.
>> 
>> Are you going to add this config definition soon? Or did you identify
>> that this setup code in udbg_16550.c is not actually needed and can we
>> simply drop this code again?
>> 
>> This issue was identified with the script ./scripts/checkkconfigsymbols.py.
>> 
>
> Was it forgotten when handling comments to 
> https://patchwork.ozlabs.org/project/linuxppc-dev/patch/20200509050340.GD1464954@thinks.paulus.ozlabs.org/ 
> ?

Yes. I reported it internally to some folks but I guess they haven't had
time to send a fixup patch.

I'm pretty sure we just need the first three hunks of that patch, but it
would be good if someone with a Microwatt setup could test it.

cheers