Revert "fs: Modify writeback to make sure block_dump is greater than 1 rather than greater than 0 for android devices"

This reverts commit 43c2ef645e86563698ecfbb4cb784740c6c0dbcf.
Revert "mm: optimize Kernel Samepage Merging(KSM)"

This reverts commit b9caf4c9bb92a6be5c066acc89a82987e4026795.
Revert "cpufreq / stats: fix race between stats allocation and first usage"

This reverts commit 6bb15ffd793901cb307e874393586606f5ed11e7.
Revert "CPU hotplug, writeback: Don't call writeback_set_ratelimit() too often during hotplug"

This reverts commit 5e08c99e879a03ed314452022545f9a2a19111e3.
Revert "swap: allow swap readahead to be merged"

This reverts commit fc45c52872bdd3db31a0456675561e79136d4c5c.
Revert "elevator: Add elevator_queue_empty_fn"

This reverts commit b78a801f07feda4f0d264df6a3119c7a7fad147b.
Revert "Revert "lib: Update RWSEM to Linux 3.10""

This reverts commit 02d9ce1c6e6cdf3ac33e824933cd0e2d3755d6f8.
added rcu boost