CONFIG_ETRAX_PC_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_PC_CHANGEABLE_DIR.
Result is shown for kernelversion 6.5.1

PC user changeable dir mask


Linux Kernel Configuration
└─>PC user changeable dir mask
In linux kernel since version 2.6.13 (release Date: 2005-08-28)  
This is a bitmask (18 bits) with information of what bits in PC
that a user can change direction on using ioctl's.
Bit set = changeable.
You probably want 0 here, but it depends on your hardware.