This is a note to let you know that I've just added the patch titled tty: serial: earlycon dependency to the 5.9-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: tty-serial-earlycon-dependency.patch and it can be found in the queue-5.9 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. commit d70ae06dff5f17f73998b37e8f0063040125a76d Author: Tong Zhang <ztong0001@xxxxxxxxx> Date: Fri Aug 28 08:39:50 2020 -0400 tty: serial: earlycon dependency [ Upstream commit 0fb9342d06b0f667b915ba58bfefc030e534a218 ] 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 Fixes: 9aac5887595b ("tty/serial: add generic serial earlycon") Signed-off-by: Tong Zhang <ztong0001@xxxxxxxxx> Link: https://lore.kernel.org/r/20200828123949.2642-1-ztong0001@xxxxxxxxx Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> diff --git a/drivers/tty/serial/Kconfig b/drivers/tty/serial/Kconfig index 9409be982aa64..54586c1aba60b 100644 --- a/drivers/tty/serial/Kconfig +++ b/drivers/tty/serial/Kconfig @@ -8,6 +8,7 @@ menu "Serial drivers" config SERIAL_EARLYCON bool + depends on SERIAL_CORE help Support for early consoles with the earlycon parameter. This enables the console before standard serial driver is probed. The console is