Test the XArray code at runtime

modulename: test_xarray.ko

configname: CONFIG_TEST_XARRAY

Linux Kernel Configuration
└─>Kernel hacking
└─>Kernel Testing and Coverage
└─>Runtime Testing
└─>Test the XArray code at runtime
In linux kernel since version 4.2 (release Date: 2015-08-30)  
source code:
lib/test_xarray.c