> select DMA_NONCOHERENT_OPS
> + select DMA_DIRECT_OPS
DMA_NONCOHERENT_OPS already selects DMA_DIRECT_OPS.
Otherwise looks good:
Reviewed-by: Christoph Hellwig
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The ARC HS processor provides an IOC port (I/O coherency bus
interface) that allows external devices such as DMA devices
to access memory through the cache hierarchy, providing
coherency between I/O transactions and the complete memory
hierarchy.
Some recent SoC with ARC HS (like HSDK) allow to se
