On 17. 08. 20, 20:54, Tong Zhang wrote:
> parse_options() in drivers/tty/serial/earlycon.c calls uart_parse_earlycon
> in drivers/tty/serial/serial_core.c therefore selecting SERIAL_EARLYCON
> should automatically select SERIAL_CORE, otherwise will result in symbol
> not found error during linking if SERIAL_CORE is not configured as builtin
> 
> Signed-off-by: Tong Zhang <ztong0...@gmail.com>

The "Fixes:" keyword should not have been in the Subject but here.
According to your findings something like this:

Fixes: 73abaf87f01b (serial: earlycon: Refactor parse_options into
serial core)

I am not sure:
1) it should be "select" (and not "depends")
2) serial earlycon should depend on serial core. But it's likely OK.

>  drivers/tty/serial/Kconfig | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/tty/serial/Kconfig b/drivers/tty/serial/Kconfig
> index 8a0352eb337c..42e844314cbb 100644
> --- a/drivers/tty/serial/Kconfig
> +++ b/drivers/tty/serial/Kconfig
> @@ -8,6 +8,7 @@ menu "Serial drivers"
>  
>  config SERIAL_EARLYCON
>       bool
> +     select SERIAL_CORE
>       help
>         Support for early consoles with the earlycon parameter. This enables
>         the console before standard serial driver is probed. The console is
> 

thanks,
-- 
js
suse labs

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