From: Christoph Hellwig <hch@xxxxxx> Date: Sat, 8 Dec 2018 09:41:10 -0800 > No need to BUG_ON() on the cache maintainance ops - they are no-ops > by default, and there is nothing in the DMA API contract that prohibits > calling them on sbus devices (even if such drivers are unlikely to > ever appear). > > Similarly a dma_supported method that always returns 0 is rather > pointless. The only thing that indicates is that no one ever calls > the method on sbus devices. > > Signed-off-by: Christoph Hellwig <hch@xxxxxx> Acked-by: David S. Miller <davem@xxxxxxxxxxxxx>
