Revert "lowmemorykiller: fix GCC-4.7 compiler warning"

This reverts commit 7cf33ec1d0d21c5fd1226d15398bdbc6590dd757.
Revert "zram swap: LMK and memcontrol update from Samsung SGS 4 update 2 source drop"

This reverts commit f5b48bb641d78791f767e492658576af0d5adea5.
Revert "Android ZRAM Optimizations: adapted from Samsung JF series kernel"

This reverts commit 1a1b53cf21e0e539c94e882e50a4cc93ef5eecc5.