tuna_ak_defconfig: Cleaning Governors and Schedulers for Purity
panel-s6e8aa0: handle potential and rare do_div panic
random: entropy tweaks are all the rage nowadays

use nonblocking for all.  Read this web page:
http://lwn.net/Articles/489734/
block/Makefile: Disable FIFO, VR, NOOP
Kernel Version: purity.006