Re: [Xen-devel] [PATCH v3 04/10] arm: introduce a global dma_ops pointer

[Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>]

On Mon, Aug 05, 2013 at 05:30:50PM +0100, Stefano Stabellini wrote:
> Initially set dma_ops to arm_dma_ops.

Looks OK to me.
> 
> 
> Signed-off-by: Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>
> CC: will.deacon@xxxxxxx
> CC: linux@xxxxxxxxxxxxxxxx
> 
> 
> Changes in v3:
> -  keep using arm_dma_ops in dmabounce.
> ---
>  arch/arm/include/asm/dma-mapping.h |    3 ++-
>  arch/arm/mm/dma-mapping.c          |    3 +++
>  2 files changed, 5 insertions(+), 1 deletions(-)
> 
> diff --git a/arch/arm/include/asm/dma-mapping.h 
> b/arch/arm/include/asm/dma-mapping.h
> index 5b8eef9..5c130bc 100644
> --- a/arch/arm/include/asm/dma-mapping.h
> +++ b/arch/arm/include/asm/dma-mapping.h
> @@ -12,6 +12,7 @@
>  #include <asm/memory.h>
>  
>  #define DMA_ERROR_CODE       (~0)
> +extern struct dma_map_ops *dma_ops;
>  extern struct dma_map_ops arm_dma_ops;
>  extern struct dma_map_ops arm_coherent_dma_ops;
>  
> @@ -19,7 +20,7 @@ static inline struct dma_map_ops *get_dma_ops(struct device 
> *dev)
>  {
>       if (dev && dev->archdata.dma_ops)
>               return dev->archdata.dma_ops;
> -     return &arm_dma_ops;
> +     return dma_ops;
>  }
>  
>  static inline void set_dma_ops(struct device *dev, struct dma_map_ops *ops)
> diff --git a/arch/arm/mm/dma-mapping.c b/arch/arm/mm/dma-mapping.c
> index 7f9b179..870b12c 100644
> --- a/arch/arm/mm/dma-mapping.c
> +++ b/arch/arm/mm/dma-mapping.c
> @@ -141,6 +141,9 @@ struct dma_map_ops arm_dma_ops = {
>  };
>  EXPORT_SYMBOL(arm_dma_ops);
>  
> +struct dma_map_ops *dma_ops = &arm_dma_ops;
> +EXPORT_SYMBOL(dma_ops);
> +
>  static void *arm_coherent_dma_alloc(struct device *dev, size_t size,
>       dma_addr_t *handle, gfp_t gfp, struct dma_attrs *attrs);
>  static void arm_coherent_dma_free(struct device *dev, size_t size, void 
> *cpu_addr,
> -- 
> 1.7.2.5
> 

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