NSA SELinux Support

modulename: selinux/built-in.ko

and/or

selinux.ko

configname: CONFIG_SECURITY_SELINUX

Linux Kernel Configuration
└─>Security options
└─>NSA SELinux Support
In linux kernel since version 2.6.12  
This selects NSA Security-Enhanced Linux (SELinux).
You will also need a policy configuration and a labeled filesystem.
If you are unsure how to answer this question, answer N.

source code:
security/