On Thu, Sep 12, 2013 at 10:11:44AM -0700, Olof Johansson wrote: > Any >32bit-addressable machine will likely want 64-bit dma_addr_t as > well. The only architecture that doesn't seem to set > ARCH_DMA_ADDR_T_64BIT based on PHYS_ADDR_T size is ARM, and I think > that should just be changed there as well.
Do we actually have any 64-bit DMA controllers out there? As far as I'm aware, all our DMA controllers are all 32-bit address only. That makes a 64-bit dma_addr_t rather silly. Remember that dma_addr_t is the value you program into the DMA controller, and _not_ the actual physical address. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
