On 20/06/17 14:23, Christoph Hellwig wrote: > On Wed, May 24, 2017 at 11:24:27AM +0100, Vladimir Murzin wrote: >> This patch adds a simple implementation of mmap to dma_noop_ops. > > Currently we use dma_common_mmap as the generic fallback if a dma_ops > instance doesn't implement a mmap method. Can you just fix up > dma_common_mmap for your nommu case - it looks like yours is basically > a subset.
dma_common_map() is guarded with CONFIG_MMU and I'm not dare to change that since I have no idea 1) why it was done 2) how it affects other arches :( > > In fact I suspect yours should call dma_mmap_from_coherent as well, > so the only different is the lack of pgprot_noncached call. > OK, I'll add a call to dma_mmap_from_coherent(). Cheers Vladimir
