On Fri, 2015-10-02 at 13:11 -0700, Nishanth Aravamudan wrote:
> Drivers like NVMe need to be able to determine the page size used for
> DMA transfers. Add a new API that defaults to return PAGE_SHIFT on all
> architectures.
>
> Signed-off-by: Nishanth Aravamudan <n...@linux.vnet.ibm.com>
>
> diff --git a/include/asm-generic/dma-mapping-common.h
> b/include/asm-generic/dma-mapping-common.h
> index b1bc954..86e4e97 100644
> --- a/include/asm-generic/dma-mapping-common.h
> +++ b/include/asm-generic/dma-mapping-common.h
> @@ -355,4 +355,11 @@ static inline int dma_set_mask(struct device *dev, u64
> mask)
> }
> #endif
>
> +#ifndef HAVE_ARCH_DMA_GET_PAGE_SHIFT
> +static inline unsigned long dma_get_page_shift(struct device *dev)
> +{
> + return PAGE_SHIFT;
> +}
> +#endif
> +
> #endif
>
Adding Arnd who is asm-generic maintainer.
Arnd/Christoph can one of you give us an ack for this patch?
cheers
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