CONFIG_ETRAX_PV_CHANGEABLE_DIR is not available for thedefaultarchitecture x86.
Result is shown for architecture cris
default or selected kernelversion does not have config value CONFIG_ETRAX_PV_CHANGEABLE_DIR.
Result is shown for kernelversion 6.5.1

PV user changeable dir mask

configname: CONFIG_ETRAX_PV_CHANGEABLE_DIR

Linux Kernel Configuration
└─>PV user changeable dir mask
In linux kernel since version 2.6.25 (release Date: 2008-04-16)  
This is a bitmask (16 bits) with information of what bits in PV
that a user can change direction on using ioctl's.
Bit set = changeable.
You probably want 0x0000 here, but it depends on your hardware.