Revert "zram swap: LMK and memcontrol update from Samsung SGS 4 update 2 source drop"

This reverts commit 1c0cadf301653db5fd536ec6bf1cdc5e259a5ec5.
Android ZRAM Optimizations: adapted from Samsung JF series kernel

Signed-off-by: Paul Reioux <reioux@gmail.com>

Conflicts:
	arch/arm/kernel/process.c
	drivers/staging/android/lowmemorykiller.c
	kernel/sched/core.c
zram swap: LMK and memcontrol update from Samsung SGS 4 update 2 source drop

Signed-off-by: Paul Reioux <reioux@gmail.com>
lowmemorykiller: fix GCC-4.7 compiler warning

Signed-off-by: Paul Reioux <reioux@gmail.com>
LMK: Optimize lowmem_shrink.

By comparing with selected_oom_score_adj instead of min_score_adj,
we may do less calculation.

Signed-off-by: Leon Ma <xindong.ma@intel.com>

Signed-off-by: Paul Reioux <reioux@gmail.com>

Conflicts:
	drivers/staging/android/lowmemorykiller.c
Revert "f2fs: data: AIO optimization compatibility fixup"

This reverts commit 7d77d75b7acb44d0e3cefd7adeb28035be8972c0.