diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c
index c0c7820d4c46b406465e0d2d8e059a80ce819476..a004c3945c67c4ca891779e5b776ebfcb9c25b7f 100644
--- a/drivers/iommu/intel-iommu.c
+++ b/drivers/iommu/intel-iommu.c
@@ -3524,7 +3524,7 @@ int dmar_find_matched_atsr_unit(struct pci_dev *dev)
 	return 0;
 }
 
-int dmar_parse_rmrr_atsr_dev(void)
+int __init dmar_parse_rmrr_atsr_dev(void)
 {
 	struct dmar_rmrr_unit *rmrr, *rmrr_n;
 	struct dmar_atsr_unit *atsr, *atsr_n;