Dan,

I just noticed that your patch "dmaengine: add the async_tx api":

@@ -22,6 +22,17 @@ config NET_DMA
          Since this is the main user of the DMA engine, it should be enabled;
          say Y here.
 
+config ASYNC_TX_DMA
+       tristate "Asynchronous Bulk Memory Transfers/Transforms API"
+       default y
+       ---help---
+         This enables the async_tx management layer for dma engines.
+         Subsystems coded to this API will use offload engines for bulk
+         memory operations where present.  Software implementations are
+         called when a dma engine is not present or fails to allocate
+         memory to carry out the transaction.
+         Current subsystems ported to async_tx: MD_RAID4,5
+

adds ASYNC_TX_DMA unconditionally to _all_ platforms. You might what to bundle 
this with something like DMA_ENGINE.

Best regards,
Stefan
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