CONFIG_CPU_CACHE_V4WB is not available for thedefaultarchitecture x86.
Result is shown for architecture arm

CONFIG_CPU_CACHE_V4WB (not configurable)

modulename: cache-v4wb.ko

configname: CONFIG_CPU_CACHE_V4WB

Linux Kernel Configuration
└─>CPU_CACHE_V4WB
In linux kernel since version 2.6.12  
source code:
/arch/arm/mm/