From mboxrd@z Thu Jan 1 00:00:00 1970 From: Dan Murphy Subject: Re: [PATCH] dmaengine: shdma: fix a build failure on platforms with no DMA support Date: Thu, 30 May 2013 11:23:13 -0500 Message-ID: <51A77CF1.7040105@ti.com> References: Mime-Version: 1.0 Content-Type: text/plain; charset="ISO-8859-1" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: Sender: linux-sh-owner@vger.kernel.org To: Guennadi Liakhovetski Cc: linux-mmc@vger.kernel.org, linux-sh@vger.kernel.org, Simon Horman , Chris Ball , linux-arm-kernel@lists.infradead.org, Kevin Hilman List-Id: linux-mmc@vger.kernel.org On 05/30/2013 11:02 AM, Guennadi Liakhovetski wrote: > On platforms with no support for the shdma dmaengine driver build is > currently failing with > > drivers/built-in.o: In function `sh_mobile_sdhi_probe': > drivers/mmc/host/sh_mobile_sdhi.c:170: undefined reference to`shdma_chan_filter' > > Fix the breakage by defining shdma_chan_filter to NULL in such > configurations. > > Signed-off-by: Guennadi Liakhovetski > --- > > This is for "next." Compile-tested only. I'll test it on hardware next > week, but I don't think it shall break anything. > > include/linux/sh_dma.h | 4 ++++ > 1 files changed, 4 insertions(+), 0 deletions(-) > > diff --git a/include/linux/sh_dma.h b/include/linux/sh_dma.h > index b64d6be..1fd8a20 100644 > --- a/include/linux/sh_dma.h > +++ b/include/linux/sh_dma.h > @@ -99,6 +99,10 @@ struct sh_dmae_pdata { > #define CHCR_TE 0x00000002 > #define CHCR_IE 0x00000004 > > +#if IS_ENABLED(CONFIG_SH_DMAE) > bool shdma_chan_filter(struct dma_chan *chan, void *arg); > +#else > +#define shdma_chan_filter NULL Would this not be better as a #else static inline bool shdma_chan_filter(struct dma_chan *chan, void *arg) { return false; } #endif Otherwise runtime will call a NULL pointer > +#endif > > #endif -- ------------------ Dan Murphy