[PATCH v9 05/11] iommu/dma: Introduce a helper to remove reserved regions

[Christoph Hellwig]

>  
> +static inline void iommu_dma_put_resv_regions(struct device *dev, struct list_head *list)
> +{
> +}
> +
>  #endif	/* CONFIG_IOMMU_DMA */

This changes behavior when CONFIG_IOMMU_DMA is not set.  So e.g. on
ARM all the drivers that are using the new helper now fail to release
reserved regions.