On 01/11/2017 12:56 AM, Christoph Hellwig wrote: >> +lib-$(CONFIG_HAS_DMA) += dma-virt.o > > There probably should be a config option for it for two reasons: > > - do not bloat kernels that don't need it. > - the feature can only work for 32-bit architectures or for > 64-bit architectures that set ARCH_DMA_ADDR_T_64BIT… > Alternatively this option would have to force > ARCH_DMA_ADDR_T_64BIT when not yet set for 64-bit architectures. > > And yes, this is currently broken already for, but we'd better fix it.
Hello Christoph, That sounds like a good idea to me. I will make sure that both dma_noop_ops and dma_virt_ops are only built if needed. Bart.
