NLS KOI8-R (Russian)

modulename: nls_koi8-r.ko

configname: CONFIG_NLS_KOI8_R

Linux Kernel Configuration
└─>File systems
└─>Native language support
└─>NLS KOI8-R (Russian)
In linux kernel since version 2.6.20 (release Date: 2007-02-04)  
If you want to display filenames with native language characters
from the Microsoft FAT file system family or from JOLIET CD-ROMs
correctly on the screen, you need to include the appropriate
input/output character sets. Say Y here for the preferred Russian
character set.

source code: