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

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Message-ID: <20140113080907.GB25466@intel.com>
Date:	Mon, 13 Jan 2014 13:39:07 +0530
From:	Vinod Koul <vinod.koul@...el.com>
To:	Randy Dunlap <rdunlap@...radead.org>
Cc:	Marc Kleine-Budde <mkl@...gutronix.de>,
	Mike Frysinger <vapier@...too.org>,
	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 Sat, Jan 11, 2014 at 10:31:00AM -0800, Randy Dunlap wrote:
> 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.
Not just these, but looking at the whole file, it needs fix. Names are very
generic here :( and bound to keep colliding with core stuff

--
~Vinod

> 
> > 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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