On Thu, May 14, 2020 at 09:59:52AM +0200, Gerd Hoffmann wrote: > Hi, > > > - for the runtime upcasting the usual approach is to check the ->ops > > pointer. Which means that would need to be the same for all virtio > > dma_bufs, which might get a bit awkward. But I'd really prefer we not > > add allocator specific stuff like this to dma-buf. > > This is exactly the problem, it gets messy quickly, also when it comes > to using the drm_prime.c helpers ... drm_prime.c helpers (not the core bits) exist becaues nvidia needed something that wasnt EXPORT_SYMBOL_GPL. I wouldn't shed a big tear if they don't fit anymore, they're kinda not great to begin with. Much midlayer, not much of valued added, but at least the _GPL is gone. -Daniel -- Daniel Vetter Software Engineer, Intel Corporation http://blog.ffwll.ch
