linux-kernel - Re: blackfin + dmaengine: conflicting define/enum "DMA

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Date:	Sat, 11 Jan 2014 10:31:00 -0800
From:	Randy Dunlap <rdunlap@...radead.org>
To:	Marc Kleine-Budde <mkl@...gutronix.de>,
	Mike Frysinger <vapier@...too.org>
CC:	uclinux-dist-devel@...ckfin.uclinux.org,
	LKML <linux-kernel@...r.kernel.org>, dmaengine@...r.kernel.org
Subject: Re: blackfin + dmaengine: conflicting define/enum "DMA_COMPLETE"

On 01/11/2014 10:09 AM, Marc Kleine-Budde wrote:
> Hello,
> 
> in current linux-next (and net-next) the compilation of the CAN
> drivers[1] with ARCH=blackfin fails with:
> 
>>   CC [M]  drivers/net/can/c_can/c_can.o
>> In file included from linux/include/linux/netdevice.h:38:0,
>>                  from linux/drivers/net/can/c_can/c_can.c:32:
>> linux/include/linux/dmaengine.h:55:2: error: expected identifier before numeric constant
>> linux/include/linux/dmaengine.h: In function 'dma_async_is_complete':
>> linux/include/linux/dmaengine.h:1023:9: error: 'DMA_IN_PROGRESS' undeclared (first use in this function)
>> linux/include/linux/dmaengine.h:1023:9: note: each undeclared identifier is reported only once for each function it appears in
> 
> There are two locations where DMA_COMPLETE is defined:
> 
>> arch/blackfin/mach-bf548/include/mach/defBF547.h:602:#define              DMA_COMPLETE  0x8        /* DMA Complete */
>> arch/blackfin/mach-bf548/include/mach/defBF544.h:622:#define              DMA_COMPLETE  0x8        /* DMA Complete */
> 
> and
> 
>> include/linux/dmaengine.h-enum dma_status {
>> include/linux/dmaengine.h:      DMA_COMPLETE,
>> include/linux/dmaengine.h-      DMA_IN_PROGRESS,
>> include/linux/dmaengine.h-      DMA_PAUSED,
>> include/linux/dmaengine.h-      DMA_ERROR,
>> include/linux/dmaengine.h-};
> 
> What's the appropriate fix for the problem?

arch/blackfin/mach-bf548/ needs a less generic name for its macro.

> Marc
> 
> [1] Yes, c_can isn't a blackfin driver, but it's the first one in my
>     compile tests and it fails.
> 


-- 
~Randy
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