On Tuesday 02 March 2010, FUJITA Tomonori wrote: > Yeah, but IIRC, Alpha, x86_64 GART, parisc, and IA64 don't have > CONFIG_ option for IOMMU virtual merging. I prefer to avoid to adding > something like CONFIG_HAVE_IOMMU_VMERGE for them. If we add > CONFIG_HAVE_IOMMU_VMERGE to them, it's a bit strange not to add the > feature to disable virtual merging for them (I guess GART already has > the feature though). While I think the runtime feature (actually a workaround for broken device drivers) should be consistently used on all architectures, or removed entirely, it's orthogonal to this discussion. I'm sure you'll come up with a reasonable name for a new option if you introduce one. CONFIG_HAVE_IOMMU_VMERGE and CONFIG_NEED_SG_DMA_LENGTH both seem ok to me. > Actually, I want to use dma_length on all the architectures (if nobody > complains). Fine with me as well. It wastes a small amount of memory but makes the code more consistent. Arnd -- To unsubscribe from this list: send the line "unsubscribe sparclinux" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
