CONFIG_MEMREGION (not configurable)

modulename: memregion.ko

configname: CONFIG_MEMREGION

Linux Kernel Configuration
└─>Library routines
└─>MEMREGION
In linux kernel since version 4.14.326 (release Date: 2023-09-23)  
source code:
lib/memregion.c
is depended by
CONFIG_ACPI_HMAT