dma_declare_coherent_memory on main memory

Christoph Hellwig hch at lst.de
Fri Dec 7 15:34:32 UTC 2018


Hi all,

the ARM imx27/31 ports and various sh boards use
dma_declare_coherent_memory on main memory taken from the memblock
allocator.

Is there any good reason these couldn't be switched to CMA areas?
Getting rid of these magic dma_declare_coherent_memory area would
help making the dma allocator a lot simpler.


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