Thanks Greg and Jiri for your suggestion! I made another attempt to fix those problems. Hope it will work this time. Thank you! On Tue, Aug 18, 2020 at 7:19 AM Greg KH <gregkh@xxxxxxxxxxxxxxxxxxx> wrote: > > On Mon, Aug 17, 2020 at 02:54:19PM -0400, 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 <ztong0001@xxxxxxxxx> > > As Jiri pointed out, the Fixes: line goes down here, not in your subject > line :) > > Please fix up, thanks. > > > --- > > drivers/tty/serial/Kconfig | 1 + > > 1 file changed, 1 insertion(+) > > What changed from v1? Also always list that below the --- line so we > know. > > thanks, > > greg k-h