Revert "dma-buf: mmap support"

This reverts commit 1e997d8f82702e7be1114fd68a8b11fcf32700af.
Revert "dma-buf: add support for kernel cpu access"

This reverts commit f133509dbbe44059a1b4ba5d546266da9b8a493d.
Revert "dma-buf: don't hold the mutex around map/unmap calls"

This reverts commit c3c66334b3cf203765ae80d0f2827f0a949759bf.
Revert "dma-buf: pass flags into dma_buf_fd."

This reverts commit 660ab527ba808cc4028fae13fae0ce9caecada74.
Revert "dma-buf: add dma_data_direction to unmap dma_buf_op"

This reverts commit d85ae9b8c77c4577a9a65d43d6e04ba7c0de6702.
Revert "dma-buf: Move code out of mutex-protected section in dma_buf_attach()"

This reverts commit b080d81eedac41f0b005ed7a53919f659f0811d0.
Revert "dma-buf: Return error instead of using a goto statement when possible"

This reverts commit 9970a2777c1a5db3313347d9df21924604d64602.
Revert "dma-buf: Remove unneeded sanity checks"

This reverts commit 185521b8e2911033cb9b84e81036bb88c1d0e608.
Revert "dma-buf: Constify ops argument to dma_buf_export()"

This reverts commit c684667188f45934b20f448bb12317a4bb1a0742.
Revert "dma-buf: Introduce dma buffer sharing mechanism"

This reverts commit 84e94bb67110691c92cf9f056a12f1eab231fea9.
Revert "ARM: Allow SoCs to enable scatterlist chaining"

This reverts commit a5e98e0e9207162ee9069d016bbd719e84ceb942.
Revert "ftrace: Move ftrace_filter_lseek out of CONFIG_DYNAMIC_FTRACE section"

This reverts commit 6c8918f2f421cc33c37f849fa5e7d5c9e44d17a7.
Revert "tracing: Fix possible NULL pointer dereferences"

This reverts commit 1b07e415313396c3b1f1467adf0956b9880b546e.
Revert "Revert "Revert "drivers: cpufreq: Send a uevent when governor changes"""

This reverts commit 5b9f1bf1f49a8be1a3ba842baab349d956cd582c.
Revert "Remove ARM sha1 routines"

This reverts commit 182963726b13e2eca81cada95f1291f154d3ca30.
Revert "lib/sha1: use the git implementation of SHA-1"

This reverts commit b4bd1549591c132e5428a7c270954d34d63cdd37.
Revert "nohz: Remove ts->inidle checks before restarting the tick"

This reverts commit 45986a3b66f8e83c33edde5aab8619faf56a1a28.
Revert "mm/slqb: replace deprecated function"

This reverts commit de3b82f437852e7f320caf35acfdf6674f0164b1.
remove unused stuff