From: Arnd Bergmann <arnd@xxxxxxxx> Date: Mon, 30 Mar 2009 17:17:56 +0200 > dma_addr_t is a big mess that was traditionally defined per > architecture, in lots of wrong ways, including the misconception > of dma64_addr_t. Sparc64 still uses a 32 bit dma_addr_t, possibly > because it always uses an IOMMU (?). It can save some space in > scatterlists, but might come back to bite us if someone tries > to build a sparc64 system with actual 64-bit DMA. There is no reason to use anything larger than a 32-bit DMA address type on sparc64, and using 32-bit saves lots of space in many data structures so I am unlikely to ever change this. :-) -- 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
