Revert "mm/ksm: engage deferred timer by default"

This reverts commit ac9ef607b97414e91ea6ddc45a021f9c342cb6b1.
Revert "Iniciar KSM al arranque + tweak KSM"

This reverts commit 5242d76c72512e425943159d15a1da103ffadcab.
Revert "swap: allow swap readahead to be merged"

This reverts commit ff72489d7074f4e5efeb27b2b7ea052cce04a682.
Revert "Rik van Riel <riel@redhat.com>"

This reverts commit bc31e840b443b985d9c331167c3461f37ae7dd5c.
Revert "swap: avoid read_swap_cache_async() race to deadlock while waiting on discard I/O completion"

This reverts commit da63a2c43ea10fd5d91ef5ba50fea94d929c8ca4.
Revert "ksm: Provide support to use deferred timers for scanner thread"

This reverts commit bf7853c19465ada0ab39c8bbb5cee9ecb6dda775.
Revert "mm: Clear page active before releasing pages"

This reverts commit 0ddce382b33d147addacd7ea9d09433cd0d456d4.
Revert "crypto: lzo - try kmalloc() before vmalloc()"

This reverts commit 7c7e71918dbc1b2fbfff53abbc9b5c7339775fb4.
Revert "mm/swapfile.c: do not skip lowest_bit in scan_swap_map() scan loop"

This reverts commit fbaff30e94f5014dfc514f708700b31b0fe1b794.