CONFIG_ETRAXFS is not available for thedefaultarchitecture x86.
Result is shown for architecture cris
ETRAX-FS-V32
modulename: cris-etraxfs-cpufreq.ko
configname: CONFIG_ETRAXFS
Processor type
└─>ETRAX-FS-V32
In linux kernel since version 2.6.25 (release Date: 2008-04-16)
Support CRIS V32.