ARM: replace custom consistent dma region with vmalloc

Hi!

Recent changes to ioremap and unification of vmalloc regions on ARM
significantly reduces the possible size of the consistent dma region and
limited allowed dma coherent/writecombine allocations.

This experimental patch series replaces custom consistent dma regions
usage in dma-mapping framework in favour of generic vmalloc areas
created on demand for each coherent and writecombine allocations.

This patch is based on vanilla v3.4-rc2 release.

Best regards
Marek Szyprowski
Samsung Poland R&D Center


Patch summary:

Marek Szyprowski (4):
  mm: vmalloc: use const void * for caller argument
  mm: vmalloc: export find_vm_area() function
  mm: vmalloc: add VM_DMA flag to indicate areas used by dma-mapping
    framework
  ARM: remove consistent dma region and use common vmalloc range for
    dma allocations

 arch/arm/include/asm/dma-mapping.h |    2 +-
 arch/arm/mm/dma-mapping.c          |  220 +++++++-----------------------------
 include/linux/vmalloc.h            |   10 +-
 mm/vmalloc.c                       |   31 ++++--
 4 files changed, 67 insertions(+), 196 deletions(-)

-- 
1.7.1.569.g6f426

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