Re: [PATCH 3/9] dma: Add dma_virt_ops

On 01/11/2017 12:56 AM, Christoph Hellwig wrote:

quoted

+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.
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