CONFIG_SERIAL_CORE_CONSOLE (not configurable)

configname: CONFIG_SERIAL_CORE_CONSOLE

Linux Kernel Configuration
└─>Device Drivers
└─>Character devices
└─>Serial drivers
└─>SERIAL_CORE_CONSOLE
In linux kernel since version 2.6.20 (release Date: 2007-02-04)  
depends
CONFIG_GENERIC_HARDIRQS
CONFIG_HAS_IOMEM
CONFIG_TTY