Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc

* 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc: (144 commits)
  powerpc/44x: Support 16K/64K base page sizes on 44x
  powerpc: Force memory size to be a multiple of PAGE_SIZE
  powerpc/32: Wire up the trampoline code for kdump
  powerpc/32: Add the ability for a classic ppc kernel to be loaded at 32M
  powerpc/32: Allow __ioremap on RAM addresses for kdump kernel
  powerpc/32: Setup OF properties for kdump
  powerpc/32/kdump: Implement crash_setup_regs() using ppc_save_regs()
  powerpc: Prepare xmon_save_regs for use with kdump
  powerpc: Remove default kexec/crash_kernel ops assignments
  powerpc: Make default kexec/crash_kernel ops implicit
  powerpc: Setup OF properties for ppc32 kexec
  powerpc/pseries: Fix cpu hotplug
  powerpc: Fix KVM build on ppc440
  powerpc/cell: add QPACE as a separate Cell platform
  powerpc/cell: fix build breakage with CONFIG_SPUFS disabled
  powerpc/mpc5200: fix error paths in PSC UART probe function
  powerpc/mpc5200: add rts/cts handling in PSC UART driver
  powerpc/mpc5200: Make PSC UART driver update serial errors counters
  powerpc/mpc5200: Remove obsolete code from mpc5200 MDIO driver
  powerpc/mpc5200: Add MDMA/UDMA support to MPC5200 ATA driver
  ...

Fix trivial conflict in drivers/char/Makefile as per Paul's directions

1 files changed, 49 insertions, 15 deletions

diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index adb23ea1c1ef..79f25cef32df 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -285,6 +285,10 @@ config IOMMU_VMERGE
 config IOMMU_HELPER
 	def_bool PPC64
 
+config PPC_NEED_DMA_SYNC_OPS
+	def_bool y
+	depends on NOT_COHERENT_CACHE
+
 config HOTPLUG_CPU
 	bool "Support for enabling/disabling CPUs"
 	depends on SMP && HOTPLUG && EXPERIMENTAL && (PPC_PSERIES || PPC_PMAC)
@@ -322,7 +326,7 @@ config KEXEC
 
 config CRASH_DUMP
 	bool "Build a kdump crash kernel"
-	depends on PPC_MULTIPLATFORM && PPC64 && RELOCATABLE
+	depends on (PPC64 && RELOCATABLE) || 6xx
 	help
 	  Build a kernel suitable for use as a kdump capture kernel.
 	  The same kernel binary can be used as production kernel and dump
@@ -401,23 +405,53 @@ config PPC_HAS_HASH_64K
 	depends on PPC64
 	default n
 
-config PPC_64K_PAGES
-	bool "64k page size"
-	depends on PPC64
-	select PPC_HAS_HASH_64K
+choice
+	prompt "Page size"
+	default PPC_4K_PAGES
 	help
-	  This option changes the kernel logical page size to 64k. On machines
-	  without processor support for 64k pages, the kernel will simulate
-	  them by loading each individual 4k page on demand transparently,
-	  while on hardware with such support, it will be used to map
-	  normal application pages.
+	  Select the kernel logical page size. Increasing the page size
+	  will reduce software overhead at each page boundary, allow
+	  hardware prefetch mechanisms to be more effective, and allow
+	  larger dma transfers increasing IO efficiency and reducing
+	  overhead. However the utilization of memory will increase.
+	  For example, each cached file will using a multiple of the
+	  page size to hold its contents and the difference between the
+	  end of file and the end of page is wasted.
+
+	  Some dedicated systems, such as software raid serving with
+	  accelerated calculations, have shown significant increases.
+
+	  If you configure a 64 bit kernel for 64k pages but the
+	  processor does not support them, then the kernel will simulate
+	  them with 4k pages, loading them on demand, but with the
+	  reduced software overhead and larger internal fragmentation.
+	  For the 32 bit kernel, a large page option will not be offered
+	  unless it is supported by the configured processor.
+
+	  If unsure, choose 4K_PAGES.
+
+config PPC_4K_PAGES
+	bool "4k page size"
+
+config PPC_16K_PAGES
+	bool "16k page size" if 44x
+
+config PPC_64K_PAGES
+	bool "64k page size" if 44x || PPC_STD_MMU_64
+	select PPC_HAS_HASH_64K if PPC_STD_MMU_64
+
+endchoice
 
 config FORCE_MAX_ZONEORDER
 	int "Maximum zone order"
-	range 9 64 if PPC_64K_PAGES
-	default "9" if PPC_64K_PAGES
-	range 13 64 if PPC64 && !PPC_64K_PAGES
-	default "13" if PPC64 && !PPC_64K_PAGES
+	range 9 64 if PPC_STD_MMU_64 && PPC_64K_PAGES
+	default "9" if PPC_STD_MMU_64 && PPC_64K_PAGES
+	range 13 64 if PPC_STD_MMU_64 && !PPC_64K_PAGES
+	default "13" if PPC_STD_MMU_64 && !PPC_64K_PAGES
+	range 9 64 if PPC_STD_MMU_32 && PPC_16K_PAGES
+	default "9" if PPC_STD_MMU_32 && PPC_16K_PAGES
+	range 7 64 if PPC_STD_MMU_32 && PPC_64K_PAGES
+	default "7" if PPC_STD_MMU_32 && PPC_64K_PAGES
 	range 11 64
 	default "11"
 	help
@@ -437,7 +471,7 @@ config FORCE_MAX_ZONEORDER
 
 config PPC_SUBPAGE_PROT
 	bool "Support setting protections for 4k subpages"
-	depends on PPC_64K_PAGES
+	depends on PPC_STD_MMU_64 && PPC_64K_PAGES
 	help
 	  This option adds support for a system call to allow user programs
 	  to set access permissions (read/write, readonly, or no access)