diff --git a/drivers/iommu/intel/iommu.h b/drivers/iommu/intel/iommu.h
index 2cee36138d6e..785aa3b62055 100644
--- a/drivers/iommu/intel/iommu.h
+++ b/drivers/iommu/intel/iommu.h
@@ -1340,7 +1340,6 @@ static inline bool intel_domain_is_ss_paging(struct dmar_domain *domain)
 	return domain->domain.ops == &intel_ss_paging_domain_ops;
 }
 
-#ifdef CONFIG_INTEL_IOMMU
 extern int intel_iommu_sm;
 int iommu_calculate_agaw(struct intel_iommu *iommu);
 int iommu_calculate_max_sagaw(struct intel_iommu *iommu);
@@ -1355,20 +1354,6 @@ static inline bool ecmd_has_pmu_essential(struct intel_iommu *iommu)
 extern int dmar_disabled;
 extern int intel_iommu_enabled;
 extern int intel_iommu_tboot_noforce;
-#else
-static inline int iommu_calculate_agaw(struct intel_iommu *iommu)
-{
-	return 0;
-}
-static inline int iommu_calculate_max_sagaw(struct intel_iommu *iommu)
-{
-	return 0;
-}
-#define dmar_disabled	(1)
-#define intel_iommu_enabled (0)
-#define intel_iommu_sm (0)
-#define intel_iommu_tboot_noforce (0)
-#endif
 
 static inline const char *decode_prq_descriptor(char *str, size_t size,
 		u64 dw0, u64 dw1, u64 dw2, u64 dw3)