From mboxrd@z Thu Jan  1 00:00:00 1970
From: Arnd Bergmann <arnd@arndb.de>
Subject: Re: [PATCH v9 07/17] h8300: miscellaneous functions
Date: Mon, 27 Apr 2015 10:57:10 +0200
Message-ID: <2426012.sTXZYqKJ88@wuerfel>
References: <1430112924-1134-1-git-send-email-ysato@users.sourceforge.jp> <1430112924-1134-8-git-send-email-ysato@users.sourceforge.jp>
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To: Yoshinori Sato <ysato@users.sourceforge.jp>
Cc: linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org

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