From: Christoph Hellwig
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).
>
> S
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.
