--- /dev/null
+++ b/backport-include/linux/iommu.h
@@ -0,0 +1,23 @@
+#ifndef __BACKPORT_LINUX_IOMMU_H
+#define __BACKPORT_LINUX_IOMMU_H
+
+#include_next <linux/iommu.h>
+#include <linux/version.h>
+
+#if LINUX_VERSION_IS_LESS(6,3,0)
+
+static inline int LINUX_BACKPORT(iommu_map)(struct iommu_domain *domain,
+					    unsigned long iova,
+					    phys_addr_t paddr, size_t size,
+					    int prot, gfp_t gfp)
+{
+	if (gfp == GFP_ATOMIC)
+		return iommu_map_atomic(domain, iova, paddr, size, prot);
+
+	return iommu_map(domain, iova, paddr, size, prot);
+}
+#define iommu_map LINUX_BACKPORT(iommu_map)
+
+#endif /* < 6.3 */
+
+#endif