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Async_tx: Offload support for the async_tx api
This allows the async_tx api to take advantage of offload engines for
memcpy, memset, xor, and raid6 p+q operations. If your platform has
a dma engine that can perform raid operations and you have enabled
MD_RAID456 say Y.
memcpy, memset, xor, and raid6 p+q operations. If your platform has
a dma engine that can perform raid operations and you have enabled
MD_RAID456 say Y.
If unsure, say N.