Re: [RFC PATCH 2/3] DMA, CMA: use general CMA reserved area management framework

[Joonsoo Kim]

On Tue, Jun 03, 2014 at 09:00:48AM +0200, Michal Nazarewicz wrote:
> On Tue, Jun 03 2014, Joonsoo Kim wrote:
> > Now, we have general CMA reserved area management framework,
> > so use it for future maintainabilty. There is no functional change.
> >
> > Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@xxxxxxx>
> 
> Acked-by: Michal Nazarewicz <mina86@xxxxxxxxxx>
> 
> > diff --git a/include/linux/dma-contiguous.h b/include/linux/dma-contiguous.h
> > index dfb1dc9..ecb85ac 100644
> > --- a/include/linux/dma-contiguous.h
> > +++ b/include/linux/dma-contiguous.h
> > @@ -53,9 +53,10 @@
> >  
> >  #ifdef __KERNEL__
> >  
> > +#include <linux/device.h>
> > +
> 
> Why is this suddenly required?
> 
> >  struct cma;
> >  struct page;
> > -struct device;
> >  
> >  #ifdef CONFIG_DMA_CMA
> 

Without including device.h, build failure occurs.
In dma-contiguous.h, we try to access to dev->cma_area, so we need
device.h. In the past, we included it luckily by swap.h in
drivers/base/dma-contiguous.c. Swap.h includes node.h and then node.h
includes device.h, so we were happy. But, in this patch, I remove
'include <linux/swap.h>' so we need to include device.h explicitly.

Thanks.
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