Merge branches 'amba', 'fixes', 'misc' and 'tauros2' into for-next

be mapped as contiguous chunk into device dma address space. By

specifying this attribute the allocated buffer is forced to be contiguous

also in physical memory.

DMA_ATTR_ALLOC_SINGLE_PAGES

---------------------------

This is a hint to the DMA-mapping subsystem that it's probably not worth

the time to try to allocate memory to in a way that gives better TLB

efficiency (AKA it's not worth trying to build the mapping out of larger

pages).  You might want to specify this if:

- You know that the accesses to this memory won't thrash the TLB.

  You might know that the accesses are likely to be sequential or

  that they aren't sequential but it's unlikely you'll ping-pong

  between many addresses that are likely to be in different physical

  pages.

- You know that the penalty of TLB misses while accessing the

  memory will be small enough to be inconsequential.  If you are

  doing a heavy operation like decryption or decompression this

  might be the case.

- You know that the DMA mapping is fairly transitory.  If you expect

  the mapping to have a short lifetime then it may be worth it to

  optimize allocation (avoid coming up with large pages) instead of

  getting the slight performance win of larger pages.

Setting this hint doesn't guarantee that you won't get huge pages, but it

means that we won't try quite as hard to get them.

NOTE: At the moment DMA_ATTR_ALLOC_SINGLE_PAGES is only implemented on ARM,

though ARM64 patches will likely be posted soon.

  int (*match)(struct device * dev, struct device_driver * drv);

match should return '1' if the driver supports the device, and '0'

otherwise. 

match should return positive value if the driver supports the device,

and zero otherwise. It may also return error code (for example

-EPROBE_DEFER) if determining that given driver supports the device is

not possible.

When a device is registered, the bus's list of drivers is iterated

over. bus->match() is called for each one until a match is found. 

	select NEED_MACH_IO_H

	select NEED_MACH_MEMORY_H

	select NO_IOPORT_MAP

	select VIRT_TO_BUS

	help

	  On the Acorn Risc-PC, Linux can support the internal IDE disk and

	  CD-ROM interface, serial and parallel port, and the floppy drive.

config BL_SWITCHER

	bool "big.LITTLE switcher support"

	depends on BIG_LITTLE && MCPM && HOTPLUG_CPU && ARM_GIC

	select ARM_CPU_SUSPEND

	select CPU_PM

	help

	  The big.LITTLE "switcher" provides the core functionality to

	def_bool y

config ARM_CPU_SUSPEND

	def_bool PM_SLEEP

	def_bool PM_SLEEP || BL_SWITCHER || ARM_PSCI_FW

	depends on ARCH_SUSPEND_POSSIBLE

config ARCH_HIBERNATION_POSSIBLE

	bool

# My testing targets (bypasses dependencies)

bp:;	$(Q)$(MAKE) $(build)=$(boot) MACHINE=$(MACHINE) $(boot)/bootpImage

i zi:;	$(Q)$(MAKE) $(build)=$(boot) MACHINE=$(MACHINE) $@

define archhelp

	$(call if_changed,objcopy)

	@$(kecho) '  Kernel: $@ is ready'

PHONY += initrd FORCE

PHONY += initrd

initrd:

	@test "$(INITRD_PHYS)" != "" || \

	(echo This machine does not support INITRD; exit -1)

	$(CONFIG_SHELL) $(srctree)/$(src)/install.sh "$(KERNELRELEASE)" \

	$(obj)/uImage System.map "$(INSTALL_PATH)"

zi:

	$(CONFIG_SHELL) $(srctree)/$(src)/install.sh "$(KERNELRELEASE)" \

	$(obj)/zImage System.map "$(INSTALL_PATH)"

i:

	$(CONFIG_SHELL) $(srctree)/$(src)/install.sh "$(KERNELRELEASE)" \

	$(obj)/Image System.map "$(INSTALL_PATH)"

subdir-	    := bootp compressed dts