File size fix
Refine setup-cache.sh
Add bankshot2_mmap.c
Add vm_mmap_pgoff
Add __mm_populate from mm/mlock.c
do_mmap_pgoff part1
do_mmap_pgoff part2
mmap_region part1
mmap_region part 2
Disable bankshot2_mmap by now. It's implemented in kernel instead.
Add mmap func pointer to bankshot2 device struct.