On Mon, Aug 01, 2016 at 09:57:33AM +0300, Haggai Eran wrote: > Allocate a CMB region to user-space as a DMA-BUF object. NACK. Absolutely no way we're going to export a low-level device specific feature to userspace like that. If you want to DMA to the CMB do it from the kernel, and for that we'll need a proper block device level API.