--- linux-2.6/drivers/dma/Kconfig	2006-09-22 06:20:16.000000000 +0100
+++ linux-2.6/drivers/dma/Kconfig.edited	2006-10-02 19:04:25.000000000 +0100
@@ -8,7 +8,11 @@ config DMA_ENGINE
 	bool "Support for DMA engines"
 	---help---
 	  DMA engines offload copy operations from the CPU to dedicated
-	  hardware, allowing the copies to happen asynchronously.
+	  hardware, allowing the copies to happen asynchronously. Special
+	  hardware is required for this, currently only the Intel E5000 
+	  chipset is supported, certain RAID controllers might support
+	  this too. Note that this has nothing to do with PCI-DMA in
+	  the first place.
 
 comment "DMA Clients"