Re: [microblaze-uclinux] kernel build error in dma.c

[John Williams <jwilliams@itee.uq.edu.au>]

Hi Stephen,

Stephen Donecker wrote:
> Has anyone tried building the kernel with the latest updates? I keep 
> getting errors referring to an undefined MAX_DMA_CHANNELS in dma.c. I 
> tracked this problem down to a recent update to the dma.c file which 
> comments out the #ifdef MAX_DMA_CHANNELS line, plus some other 
> modifications.

Yep - looks like a recent commit broke it all right.

> So should I define MAX_DMA_CHANNELS in dma.h or revert back to the old 
> dma.c source?

For now I'd probably just back out to the previous dma.c - I've mailed 
the uclinux-dev list about it.  It looks like a bad bit of code, because 
the subsequent definition

static struct dma_chan dma_chan_busy[MAX_DMA_CHANNELS] = {

is no longer conditional on MAX_DMA_CHANNELS being defined.

Obviously, microblaze isn't doing any DMA - to be honest I've never even 
looked at the DMA stuff to see how it is stubbed.

I'll report back when I hear from the uclinux list.

Cheers,

John

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