CONFIG_ARCH_USE_MEMTEST (not configurable)

configname: CONFIG_ARCH_USE_MEMTEST

Linux Kernel Configuration
└─>Kernel hacking
└─>Kernel Testing and Coverage
└─>ARCH_USE_MEMTEST
In linux kernel since version 5.2 (release Date: 2019-07-07)  
An architecture should select this when it uses early_memtest()
during boot process.