On Monday 27 April 2015 14:35:14 Yoshinori Sato wrote:
> +void dma_sync_single_for_device(struct device *dev, dma_addr_t handle,
> + size_t size, enum dma_data_direction dir)
> +{
> +}
> +EXPORT_SYMBOL(dma_sync_single_for_device);
> +
> +void dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg,
> + int nents, enum dma_data_direction dir)
> +{
> + int i;
> +
> + for (i = 0; i < nents; sg++, i++)
> + dma_sync_single_for_device(dev, sg->dma_address,
> + sg->length, dir);
> +}
> +EXPORT_SYMBOL(dma_sync_sg_for_device);
> +
> +dma_addr_t dma_map_single(struct device *dev, void *addr, size_t size,
> + enum dma_data_direction dir)
> +{
> + dma_addr_t handle = virt_to_bus(addr);
> +
> + dma_sync_single_for_device(dev, handle, size, dir);
> + return handle;
> +}
> +EXPORT_SYMBOL(dma_map_single);
As this all doesn't do anything, and your dma-mapping.h header explains
that the architecture is cache-coherent, just remove these functions,
and replace them with empty 'static inline' helpers in that header.
Arnd
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