On Sun, Oct 30, 2022 at 10:02:53AM +0100, Greg Kroah-Hartman wrote: > Ah, my fault, sorry, you are right. Is there a sparse tag that just > means "enforce this void * type?" I guess we could do that with something > like: > typedef void *dmaptr; > > but that feels icky. That's because it is :) I find the concept of the DMA pointes pretty strange to be honest. It only affects a subset of dma (when devices are not attached in a DMA coherent way). So count me in as someone who would be much more happy about figuring out a way to simplify bounce buffer for non-coherent DMA if the start and length are not aligned to the cache line size over any kind of special annotation all over the kernel.
