linux-toradex.git/arch/arm/Kconfig, branch v2.6.27.17

[ARM] Skip memory holes in FLATMEM when reading /proc/pagetypeinfo

2008-08-27T19:09:28+00:00

Ordinarily, memory holes in flatmem still have a valid memmap and is safe
to use. However, an architecture (ARM) frees up the memmap backing memory
holes on the assumption it is never used. /proc/pagetypeinfo reads the
whole range of pages in a zone believing that the memmap is valid and that
pfn_valid will return false if it is not. On ARM, freeing the memmap breaks
the page->zone linkages even though pfn_valid() returns true and the kernel
can oops shortly afterwards due to accessing a bogus struct zone *.

This patch lets architectures say when FLATMEM can have holes in the
memmap. Rather than an expensive check for valid memory, /proc/pagetypeinfo
will confirm that the page linkages are still valid by checking page->zone
is still the expected zone. The lookup of page_zone is safe as there is a
limited range of memory that is accessed when calling page_zone.  Even if
page_zone happens to return the correct zone, the impact is that the counters
in /proc/pagetypeinfo are slightly off but fragmentation monitoring is
unlikely to be relevant on an embedded system.

Reported-by: H Hartley Sweeten 
Signed-off-by: Mel Gorman 
Tested-by: H Hartley Sweeten 
Signed-off-by: Russell King

regulator: core kbuild files

2008-07-30T09:10:22+00:00

This patch adds kernel build support for the regulator core.

Signed-off-by: Philipp Zabel 
Signed-off-by: Liam Girdwood

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6

2008-07-29T01:14:24+00:00

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6: (21 commits)
  x86/PCI: use dev_printk when possible
  PCI: add D3 power state avoidance quirk
  PCI: fix bogus "'device' may be used uninitialized" warning in pci_slot
  PCI: add an option to allow ASPM enabled forcibly
  PCI: disable ASPM on pre-1.1 PCIe devices
  PCI: disable ASPM per ACPI FADT setting
  PCI MSI: Don't disable MSIs if the mask bit isn't supported
  PCI: handle 64-bit resources better on 32-bit machines
  PCI: rewrite PCI BAR reading code
  PCI: document pci_target_state
  PCI hotplug: fix typo in pcie hotplug output
  x86 gart: replace to_pages macro with iommu_num_pages
  x86, AMD IOMMU: replace to_pages macro with iommu_num_pages
  iommu: add iommu_num_pages helper function
  dma-coherent: add documentation to new interfaces
  Cris: convert to using generic dma-coherent mem allocator
  Sh: use generic per-device coherent dma allocator
  ARM: support generic per-device coherent dma mem
  Generic dma-coherent: fix DMA_MEMORY_EXCLUSIVE
  x86: use generic per-device dma coherent allocator
  ...

arm: fix HAVE_CLK merge goof

2008-07-28T23:30:20+00:00

This fixes a merge goof whereby ARCH_EP93XX got the "select HAVE_CLK" line
which belongs instead with ARCH_AT91.

Signed-off-by: David Brownell 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

Merge branch 'linus' into core/generic-dma-coherent

2008-07-28T22:07:55+00:00

Conflicts:

	arch/x86/Kconfig

Signed-off-by: Ingo Molnar

[ARM] fix IOP32x, IOP33x, MXC and Samsung builds

2008-07-26T14:41:25+00:00

7444a72effa632fcd8edc566f880d96fe213c73b caused these platforms to lose
their GPIOLIB configuration.  Convert the missed Kconfig symbols using:

  sed -i s/HAVE_GPIO_LIB/ARCH_REQUIRE_GPIOLIB/ arch/arm/Kconfig arch/arm/plat-s3c24xx/Kconfig

Signed-off-by: Russell King

gpiolib: allow user-selection

2008-07-25T17:53:30+00:00

This patch adds functionality to the gpio-lib subsystem to make it
possible to enable the gpio-lib code even if the architecture code didn't
request to get it built in.

The archtitecture code does still need to implement the gpiolib accessor
functions in its asm/gpio.h file.  This patch adds the implementations for
x86 and PPC.

With these changes it is possible to run generic GPIO expansion cards on
every architecture that implements the trivial wrapper functions.  Support
for more architectures can easily be added.

Signed-off-by: Michael Buesch 
Cc: Benjamin Herrenschmidt 
Cc: Stephen Rothwell 
Cc: David Brownell 
Cc: Russell King 
Cc: Haavard Skinnemoen 
Cc: Jesper Nilsson 
Cc: Ralf Baechle 
Cc: Paul Mackerras 
Cc: Benjamin Herrenschmidt 
Cc: Ingo Molnar 
Cc: Thomas Gleixner 
Cc: Jean Delvare 
Cc: Samuel Ortiz 
Cc: Kumar Gala 
Cc: Sam Ravnborg 
Cc: Adrian Bunk 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

add HAVE_CLK to Kconfig, for driver dependencies

2008-07-24T17:47:13+00:00

Flag platforms as HAVE_CLK (or not) in Kconfig, based on whether they
support  calls, so that otherwise portable drivers which need
those calls can list that dependency.

Something like this is a prerequisite for merging the musb_hdrc driver,
currently used on platforms including Davinci, OMAP2430, OMAP3xx ...  and
the discrete TUSB6010 chip, which doesn't have a natural platform
dependency.  (Used with OMAP 2420 in current Nokia N8x0 tablets.)

Signed-off-by: David Brownell 
Cc: Russell King 
Acked-by: Haavard Skinnemoen 
Cc: Benjamin Herrenschmidt 
Cc: Paul Mackerras 
Cc: Paul Mundt 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

kgdb: support for ARCH=arm

2008-07-23T16:30:15+00:00

This patch adds the ARCH=arm specific a kgdb backend, originally
written by Deepak Saxena  and George Davis
.  Geoff Levand ,
Nicolas Pitre, Manish Lachwani, and Jason Wessel have contributed
various fixups here as well.

The KGDB patch makes one change to the core ARM architecture such that
the traps are initialized early for use with the debugger or other
subsystems.

[ mingo@elte.hu: small cleanups. ]
[ ben-linux@fluff.org: fixed early_trap_init ]

Signed-off-by: Jason Wessel 
Acked-by: Deepak Saxena

ARM: support generic per-device coherent dma mem

2008-07-18T19:14:01+00:00

Signed-off-by: Dmitry Baryshkov 
Cc: Jesse Barnes 
Cc: Russell King 
Signed-off-by: Ingo Molnar