DMA4 reserved for cascade

• To: Linux Kernel Mailing List <[email protected]>
• Subject: DMA4 reserved for cascade
• From: David Newall <[email protected]>
• Date: Tue, 20 Nov 2007 01:33:24 +1030
• Sender: [email protected]
• User-agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.8.1.2) Gecko/20070221 SeaMonkey/1.1.1

There seems something too-specific to PC-architecture in kernel/dma.c, which is that DMA4 is reserved for "cascade". Perhaps it should be reserved in architecture-specific initialisation. What do other architectures do with that?

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