On Thu, Aug 13, 2015 at 04:20:40PM +0100, Russell King - ARM Linux wrote: > > -/* > > - * Dummy noncoherent implementation. We don't provide a dma_cache_sync > > - * function so drivers using this API are highlighted with build warnings. > > - */ > > I'd like a similar comment to remain after this patch explaining that we > don't support non-coherent allocations and that it'll be highlighted by > the lack of dma_cache_sync, otherwise I'm sure we'll start to get patches > to add the thing. I'll keep a modified version of this comment in the ARM dma-mapping.h in addition to an explanation near the new common dma_alloc_noncoherent definition, thanks!