linux-kernel - [PATCHv6 0/2] ARM: replace custom consistent dma region with vmalloc

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Date:	Mon, 30 Jul 2012 10:28:17 +0200
From:	Marek Szyprowski <m.szyprowski@...sung.com>
To:	linux-arm-kernel@...ts.infradead.org,
	linaro-mm-sig@...ts.linaro.org, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org
Cc:	Marek Szyprowski <m.szyprowski@...sung.com>,
	Kyungmin Park <kyungmin.park@...sung.com>,
	Arnd Bergmann <arnd@...db.de>,
	Russell King - ARM Linux <linux@....linux.org.uk>,
	Chunsang Jeong <chunsang.jeong@...aro.org>,
	Krishna Reddy <vdumpa@...dia.com>,
	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
	Hiroshi Doyu <hdoyu@...dia.com>,
	Subash Patel <subashrp@...il.com>,
	Minchan Kim <minchan@...nel.org>
Subject: [PATCHv6 0/2] ARM: replace custom consistent dma region with vmalloc

Hello!

This is yet another quick update on the patchset which replaces custom 
consistent dma regions usage in dma-mapping framework in favour of
generic vmalloc areas created on demand for each allocation. The main
purpose for this patchset is to remove 2MiB limit of dma
coherent/writecombine allocations.

This version addresses a few more cleanups pointed by Minchan Kim.

This patch is based on vanilla v3.5 release.

Best regards
Marek Szyprowski
Samsung Poland R&D Center

Changelog:

v6:
- more cleanups of minor issues pointed by Minchan Kim, moved
  arm_dma_mmap() changes into separate patch

v5: http://thread.gmane.org/gmane.linux.kernel.mm/83096
- fixed another minor issues pointed by Minchan Kim: added more comments
  here and there, changed pr_err() + stack_dump() to WARN(), added a fix
  for no-MMU systems

v4: http://thread.gmane.org/gmane.linux.kernel.mm/80906
- replaced arch-independent VM_DMA flag with ARM-specific
  VM_ARM_DMA_CONSISTENT flag

v3: http://thread.gmane.org/gmane.linux.kernel.mm/80028
- rebased onto v3.4-rc2: added support for IOMMU-aware implementation 
  of dma-mapping calls, unified with CMA coherent dma pool
- implemented changes requested by Minchan Kim: added more checks for
  vmarea->flags & VM_DMA, renamed some variables, removed obsole locks,
  squashed find_vm_area() exporting patch into the main redesign patch 

v2: http://thread.gmane.org/gmane.linux.kernel.mm/78563
- added support for atomic allocations (served from preallocated pool)
- minor cleanup here and there
- rebased onto v3.4-rc7

v1: http://thread.gmane.org/gmane.linux.kernel.mm/76703
- initial version

Patch summary:

Marek Szyprowski (2):
  mm: vmalloc: use const void * for caller argument
  ARM: dma-mapping: remove custom consistent dma region

 Documentation/kernel-parameters.txt |    2 +-
 arch/arm/include/asm/dma-mapping.h  |    2 +-
 arch/arm/mm/dma-mapping.c           |  486 ++++++++++++-----------------------
 arch/arm/mm/mm.h                    |    3 +
 include/linux/vmalloc.h             |    9 +-
 mm/vmalloc.c                        |   28 ++-
 6 files changed, 194 insertions(+), 336 deletions(-)

-- 
1.7.1.569.g6f426

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