Debug VM translations

modulename: physaddr.ko

configname: CONFIG_DEBUG_VIRTUAL

Linux Kernel Configuration
└─>Kernel hacking
└─>Memory Debugging
└─>Debug VM translations
In linux kernel since version 2.6.28 (release Date: 2008-12-24)  
Enable some costly sanity checks in virtual to page code. This can
catch mistakes with virt_to_page() and friends.

If unsure, say N.

source code:
arch/arm/mm/physaddr.c