Hello! This patchset 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. Atomic allocations are served from special pool preallocated on boot, becasue vmalloc areas cannot be reliably created in atomic context. Linux v3.5-rc1 introduced a lot of changes to ARM dma-mapping subsystem (CMA and dmamap_ops based implementation has been finally merged), so the previous version of these patches is not applicable anymore. This version provides an update required for applying them on v3.5-rc2 kernel as well as some changes requested by Minchan Kim in his review. This patch is based on vanilla v3.5-rc2 release. Atomic allocations have been tested with s3c-sdhci driver on Samsung UniversalC210 board with dmabounce code enabled to force dma_alloc_coherent() use on each dma_map_* call (some of them are made from interrupts). Best regards Marek Szyprowski Samsung Poland R&D Center Changelog: v3: - 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 (3): mm: vmalloc: use const void * for caller argument mm: vmalloc: add VM_DMA flag to indicate areas used by dma-mapping framework 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 | 503 ++++++++++++----------------------- include/linux/vmalloc.h | 10 +- mm/vmalloc.c | 31 ++- 5 files changed, 206 insertions(+), 342 deletions(-) -- 1.7.1.569.g6f426 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>