On Wed, Dec 12, 2018 at 05:57:02PM +0900, Tomasz Figa wrote: > How about dma_sync_sg_*()? I'd expect some drivers to export/import > such memory via sg, since that's the typical way of describing memory > in DMA-buf. The way it is implemented dma_sync_sg_* would just work, however there really should be no need to have sglists for buffers created by this API. > Sounds good to me. Thanks for working on this. I'd be happy to be on > CC and help with review when you post the patches later. The patches were already posted here: https://lists.linuxfoundation.org/pipermail/iommu/2018-December/031982.html