On Fri, 2015-02-06 at 14:55 +0000, Robin Murphy wrote
<...>
> diff --git a/arch/arm64/include/asm/dma-mapping.h
> b/arch/arm64/include/asm/dma-mapping.h
> index 6932bb5..c1b271f 100644
> --- a/arch/arm64/include/asm/dma-mapping.h
> +++ b/arch/arm64/include/asm/dma-mapping.h
> @@ -62,13 +62,30 @@ static inline bool is_device_dma_coherent(struct device
> *dev)
>
> #include <asm-generic/dma-mapping-common.h>
>
> +#ifdef CONFIG_IOMMU_DMA
> +static inline struct iommu_dma_domain *get_dma_domain(struct device *dev)
> +{
> + return dev->archdata.dma_domain;
> +}
> +
> +static inline void set_dma_domain(struct device *dev,
> + struct iommu_dma_domain *dma_domain)
> +{
> + dev->archdata.dma_domain = dma_domain;
> +}
> +#endif
> +
> static inline dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr)
> {
> + if (WARN_ON(dev && get_dma_domain(dev)))
> + return DMA_ERROR_CODE;
> return (dma_addr_t)paddr;
> }
Hi Robin,
Build fail if CONFIG_IOMMU_DMA is not enabled.
In file included from ../include/linux/dma-mapping.h:82:0,
from ../arch/arm64/kernel/asm-offsets.c:23:
../arch/arm64/include/asm/dma-mapping.h: In function 'phys_to_dma':
../arch/arm64/include/asm/dma-mapping.h:81:2: error: implicit declaration of
function 'get_dma_domain' [-Werror=implicit-function-declaration]
if (WARN_ON(dev && get_dma_domain(dev)))
^
Joe.C
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