On Wednesday 17 August 2011, Mark Salter wrote: > C6X is never consistent in that there is no hw snooping between main > memory and L2 cache. There is some cache control however which allows > us to create a pool of uncached memory for use as consistent DMA memory. > I think the __dma_is_coherent tries to tell at runtime if the dma handle > comes from such a pool of consistent memory. > > I'm not aware of any drivers actually needing this although I'm sure TI > has some. For the purpose of getting the arch accepted, I could just > punt and take it out for now, simplifying the dma support. It can be > revisited later if needed. Yes, sounds good. Not sure if you meant removing all calls to arch_is_coherent() as well, but I'd suggest you do that, too. This should further simplify the code by removing code paths that are unused and untested. Arnd -- 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
