CONFIG_CODE_PATCHING_SELFTEST is not available for thedefaultarchitecture x86.
Result is shown for architecture powerpc

Run self-tests of the code-patching code

modulename: test-code-patching.ko

configname: CONFIG_CODE_PATCHING_SELFTEST

Linux Kernel Configuration
└─>Run self-tests of the code-patching code
In linux kernel since version 2.6.27 (release Date: 2008-10-09)  
source code:
arch/powerpc/lib/test-code-patching.c