Re: [Linaro-mm-sig] [RFC v2 1/2] dma-buf: Introduce dma buffer sharing mechanism

On Wed, Dec 21, 2011 at 10:57 PM, Arnd Bergmann arnd@arndb.de wrote:

On Tuesday 20 December 2011, Daniel Vetter wrote:

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I'm thinking for a first version, we can get enough mileage out of it by saying:

1. only exporter can mmap to userspace
2. only importers that do not need CPU access to buffer..

Thanks Rob - and the exporter can do the mmap outside of dma-buf usage, right? I mean, we don't need to provide an mmap to dma_buf() and restrict it to exporter, when the exporter has more 'control' of the buffer anyways.

BR, ~Sumit.