[PATCH V1 1/6] arm/xen: Introduce xen_setup_dma_ops()

[Christoph Hellwig]

On Fri, Apr 22, 2022 at 07:50:58PM +0300, Oleksandr Tyshchenko wrote:
> +#ifndef _ASM_ARM_XEN_OPS_H
> +#define _ASM_ARM_XEN_OPS_H
> +
> +#include <xen/swiotlb-xen.h>
> +
> +static inline void xen_setup_dma_ops(struct device *dev)
> +{
> +#ifdef CONFIG_XEN
> +	if (xen_swiotlb_detect())
> +		dev->dma_ops = &xen_swiotlb_dma_ops;
> +#endif

Maybe create a proper !CONFIG_XEN stub for xen_swiotlb_detect instead
of the ifdef here, but otherwise this looks good to me.