[PATCH 4/8] ARM: dma-mapping: implement dma sg methods on top of generic dma ops

Russell King - ARM Linux linux at arm.linux.org.uk
Mon Jun 20 10:40:12 EDT 2011

On Mon, Jun 20, 2011 at 09:50:09AM +0200, Marek Szyprowski wrote:
> This patch converts all dma_sg methods to be generic (independent of the
> current DMA mapping implementation for ARM architecture). All dma sg
> operations are now implemented on top of respective
> dma_map_page/dma_sync_single_for* operations from dma_map_ops structure.

No.  We really don't want to do this.  If we want to move the dsb() out
of the mapping functions (which I have a patch for) to avoid doing a
dsb() on each and every sg segment, then we must not use the generic

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