diff --git a/include/linux/iommu.h b/include/linux/iommu.h
index d6aaaec3caf46..301e97d745c13 100644
--- a/include/linux/iommu.h
+++ b/include/linux/iommu.h
@@ -841,7 +841,6 @@ static inline void iommu_iotlb_gather_init(struct iommu_iotlb_gather *gather)
 	};
 }
 
-extern bool iommu_present(const struct bus_type *bus);
 extern bool device_iommu_capable(struct device *dev, enum iommu_cap cap);
 extern bool iommu_group_has_isolated_msi(struct iommu_group *group);
 struct iommu_domain *iommu_paging_domain_alloc_flags(struct device *dev, unsigned int flags);