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RDMA ULPs should only perform DMA through the ib_dma_* API instead of using the hidden dma_device directly. In addition using the dma coherent API family that dmapool is a part of can be very ineffcient on plaforms that are not DMA coherent. Switch to use slab allocations and the ib_dma_* APIs instead. Link: https://lore.kernel.org/r/20201106181941.1878556-6-hch@lst.de Signed-off-by: Christoph Hellwig <hch@lst.de> Acked-by: Santosh Shilimkar <santosh.shilimkar@oracle.com> Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>