Looks ok to me, but before I pick the series up in the dma-mapping tree
I really want an ACK from the arm64 maintainers.
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Right now, smmu is using dma_alloc_coherent() to get memory to save queues
and tables. Typically, on ARM64 server, there is a default CMA located at
node0, which could be far away from node2, node3 etc.
with this patch, smmu will get memory from local numa node to save command
queues and page table
