From: Christoph Hellwig <[email protected]>
Date: Thu,  8 Jun 2017 15:25:53 +0200

> Usually dma_supported decisions are done by the dma_map_ops instance.
> Switch sparc to that model by providing a ->dma_supported instance for
> sbus that always returns false, and implementations tailored to the sun4u
> and sun4v cases for sparc64, and leave it unimplemented for PCI on
> sparc32, which means always supported.
> 
> Signed-off-by: Christoph Hellwig <[email protected]>

Acked-by: David S. Miller <[email protected]>
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