CONFIG_DCACHE_WRITE_THROUGH is not available for thedefaultarchitecture x86.
Result is shown for architecture sh64
default or selected kernelversion does not have config value CONFIG_DCACHE_WRITE_THROUGH.
Result is shown for kernelversion 5.4.123

Write-through

configname: CONFIG_DCACHE_WRITE_THROUGH

DCache mode
└─>Write-through
In linux kernel since version 2.6.12