Merge remote-tracking branch 'origin/next' into kvm-ppc-next

Conflicts:
	mm/Kconfig

CMA DMA split and ZSWAP introduction were conflicting, fix up manually.

diff --cc arch/arm/mm/dma-mapping.c
Simple merge

diff --cc arch/powerpc/include/asm/kvm_book3s_64.h
Simple merge

diff --cc arch/powerpc/kernel/asm-offsets.c
Simple merge

diff --cc arch/powerpc/kernel/setup_64.c
Simple merge

diff --cc arch/powerpc/kvm/book3s_64_mmu_hv.c
Simple merge

diff --cc arch/powerpc/kvm/book3s_hv_rm_mmu.c
Simple merge

diff --cc arch/powerpc/kvm/powerpc.c
Simple merge

diff --cc drivers/base/Makefile
Simple merge

diff --cc mm/Kconfig
index 81bcb4bd422d17b13f08fb8b9a906fe2b7eb2e40,8028dcc6615c6bbd533adf060ea3d9db36b9a48c..6cdd27043303e7473925bbc04778a43481dc2205
--- 1/mm/Kconfig
--- 2/mm/Kconfig
+++ b/mm/Kconfig
@@@ -478,26 -478,44 +478,68 @@@ config FRONTSWA
  
          If unsure, say Y to enable frontswap.
  
 +config CMA
 +      bool "Contiguous Memory Allocator"
 +      depends on HAVE_MEMBLOCK
 +      select MIGRATION
 +      select MEMORY_ISOLATION
 +      help
 +        This enables the Contiguous Memory Allocator which allows other
 +        subsystems to allocate big physically-contiguous blocks of memory.
 +        CMA reserves a region of memory and allows only movable pages to
 +        be allocated from it. This way, the kernel can use the memory for
 +        pagecache and when a subsystem requests for contiguous area, the
 +        allocated pages are migrated away to serve the contiguous request.
 +
 +        If unsure, say "n".
 +
 +config CMA_DEBUG
 +      bool "CMA debug messages (DEVELOPMENT)"
 +      depends on DEBUG_KERNEL && CMA
 +      help
 +        Turns on debug messages in CMA.  This produces KERN_DEBUG
 +        messages for every CMA call as well as various messages while
 +        processing calls such as dma_alloc_from_contiguous().
 +        This option does not affect warning and error messages.
++
+ config ZBUD
+       tristate
+       default n
+       help
+         A special purpose allocator for storing compressed pages.
+         It is designed to store up to two compressed pages per physical
+         page.  While this design limits storage density, it has simple and
+         deterministic reclaim properties that make it preferable to a higher
+         density approach when reclaim will be used.
+ 
+ config ZSWAP
+       bool "Compressed cache for swap pages (EXPERIMENTAL)"
+       depends on FRONTSWAP && CRYPTO=y
+       select CRYPTO_LZO
+       select ZBUD
+       default n
+       help
+         A lightweight compressed cache for swap pages.  It takes
+         pages that are in the process of being swapped out and attempts to
+         compress them into a dynamically allocated RAM-based memory pool.
+         This can result in a significant I/O reduction on swap device and,
+         in the case where decompressing from RAM is faster that swap device
+         reads, can also improve workload performance.
+ 
+         This is marked experimental because it is a new feature (as of
+         v3.11) that interacts heavily with memory reclaim.  While these
+         interactions don't cause any known issues on simple memory setups,
+         they have not be fully explored on the large set of potential
+         configurations and workloads that exist.
+ 
+ config MEM_SOFT_DIRTY
+       bool "Track memory changes"
+       depends on CHECKPOINT_RESTORE && HAVE_ARCH_SOFT_DIRTY
+       select PROC_PAGE_MONITOR
+       help
+         This option enables memory changes tracking by introducing a
+         soft-dirty bit on pte-s. This bit it set when someone writes
+         into a page just as regular dirty bit, but unlike the latter
+         it can be cleared by hands.
+ 
+         See Documentation/vm/soft-dirty.txt for more details.