CONFIG_CPU_COPY_FEROCEON is not available for thedefaultarchitecture x86.
Result is shown for architecture arm

CONFIG_CPU_COPY_FEROCEON (not configurable)

modulename: copypage-feroceon.ko

configname: CONFIG_CPU_COPY_FEROCEON

Linux Kernel Configuration
└─>CPU_COPY_FEROCEON
In linux kernel since version 2.6.26 (release Date: 2008-07-13)  
source code:
depends
CONFIG_MMU