Herrera-Bendezu, Luis wrote:
> 
> I am using PPC405 processor which does not support snooping and yes
> CONFIG_NOT_COHERENT_CACHE is defined. But I still need to make memory
> consistent (dma_sync_single_*) after each DMA transfer.

That is because the memory is mapped cacheable in user-space. You need
the path which sets the vma protection to non-cacheable, but add an
rtdm_iomap_noncacheable_to_user function.
-- 
                                                                Gilles.

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