On Mon, Jun 01, 2009 at 11:28:09AM +0100, Arnd Bergmann wrote: > On Monday 01 June 2009, Russell King wrote: > > On Mon, Jun 01, 2009 at 05:08:09PM +0900, FUJITA Tomonori wrote: > > > This adds a version of the dma-mapping API to asm-generic that can be > > > used by most architectures that only need a linear mapping. > > > > It depends what is meant by "linear mapping". > > > > If that's just a way of saying "all that needs to be done for the > > DMA streaming APIs is to flush the cache" then the vast majority of > > ARMs fall into that category. > > Right. You can probably split out the arm dma-mapping.h implementation > into the dmabounce version and a version that falls back to my > asm-generic code. > > One feature that the arm code currently has that I'm still missing is > highmem support, which seems to be relatively complex in arm > (three different implementations). Not sure how to best fit that in there. Err - there's only one highmem implementation on ARM. Anyway, as I hinted, things in this area will most likely become more complex in the near future, so any unification of the ARM dma-mapping will have to be undone. Let's wait for the ARMv7 support to mature before trying to unify too much. -- Russell King Linux kernel 2.6 ARM Linux - http://www.arm.linux.org.uk/ maintainer of: -- To unsubscribe from this list: send the line "unsubscribe linux-arch" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
