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Date:   Fri, 28 Jan 2011 08:34:22 +0100
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From:   Takashi Iwai <tiwai@suse.de>
To:     Ralf Baechle <ralf@linux-mips.org>
Cc:     Andrew Morton <akpm@linux-foundation.org>,
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Subject: Re: mips allmodconfig
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At Tue, 25 Jan 2011 14:31:13 -0800,
Andrew Morton wrote:
> 
> sound/oss/soundcard.c:69: error: `MAX_DMA_CHANNELS' undeclared here (not in a function)
> sound/oss/soundcard.c:69: error: storage size of `dma_alloc_map' isn't known
> sound/oss/soundcard.c:69: warning: 'dma_alloc_map' defined but not used         
> 
> In case you happen to be interested in oss drivers ;)

I took a quick look.  The only case where no MAX_DMA_CHANNELS is
defined is only MIPS with CONFIG_GENERIC_ISA_DMA_SUPPORT_BROKEN.
In arch/mips/include/asm/dma.h:

#ifndef CONFIG_GENERIC_ISA_DMA_SUPPORT_BROKEN
#define MAX_DMA_CHANNELS	8
#endif

What is the intention of this ifdef?


thanks,

Takashi  (not interested but just bored ;)