On Thu, Jun 17, 2021 at 05:30:11PM +0900, Tomasz Figa wrote: > We still have use cases for dma_alloc_coherent() and DMA_ATTR_NO_KERNEL_MAPPING. dma_alloc_coherent does not take a flags argument, so you can't use DMA_ATTR_NO_KERNEL_MAPPING with it. What would your use case be here anyway? In general DMA_ATTR_NO_KERNEL_MAPPING is rather misnamed, as usually there is a kernel mapping, just not one that is coherent and should be used.
