add ARCH_HAVE_KMEMCHECK to arm arch
export direct mapping information to /proc/meminfo file
use 4k page in init_mm mapping
copy x86 kmemcheck files to arm arch, but can not be
 compiled
fix compile warning, but not workable
make BUG_ON workable on page lookup routine
always use 4K page direct mapping when CONFIG_KMEMCHECK opened
change local var level to is_pte fixing compile error
use 4k to direct mapping, but not work
just make lowmem mapping with 4k
use a temp page table