> diff --git a/include/linux/iommu.h b/include/linux/iommu.h
> index 70393fbb57ed..79cb6eb560a8 100644
> --- a/include/linux/iommu.h
> +++ b/include/linux/iommu.h
> @@ -1059,4 +1059,40 @@ void iommu_debugfs_setup(void);
> static inline void iommu_debugfs_setup(void) {}
> #endif
>
> +#ifdef CONFIG_IOMMU_DMA
> +#include <linux/msi.h>
I don't think msi.h is actually needed here.
Just make the struct msi_desc and struct msi_msg forward declarations
unconditional and we should be fine.
