Re: [PATCH] serial: earlycon requires console support

From: Arnd Bergmann
Date: Sat Apr 11 2015 - 11:01:01 EST

On Saturday 11 April 2015 09:39:43 Peter Hurley wrote:
> Hi Arnd,
> On 04/10/2015 06:01 PM, Arnd Bergmann wrote:
> > A configuration that enables earlycon but not the core console
> > code causes a link error:
> >
> > drivers/built-in.o: In function `setup_earlycon':
> > drivers/tty/serial/earlycon.c:70: undefined reference to `uart_parse_earlycon'
> >
> > That error can be triggered by the newly added samsung earlycon support,
> > which is missing a 'select' statement. This patch adds the 'select'
> > to make serial-samsung behave like the other drivers.
> Since Kconfig has a separate option for enabling console on Samsung,
> I'd rather move uart_parse_earlycon() and enclose it in
> ...
> #endif
> I'll send a fix for that right now.

Hmm, maybe the 'select SERIAL_EARLYCON' should just be under SERIAL_SAMSUNG_CONSOLE
then? Upon looking closer at the other drivers, that seems to be the common
model, and I don't know what it means to have EARLYCON but no CORE_CONSOLE

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