diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c
index 3c1a29104f0e2fcbbdb5bc21bf15ae250d6a4221..797e6454afd5c7c06efc161e5d21202fde1e92aa 100644
--- a/drivers/iommu/amd_iommu.c
+++ b/drivers/iommu/amd_iommu.c
@@ -2382,11 +2382,9 @@ static void __unmap_single(struct dma_ops_domain *dma_dom,
 			   size_t size,
 			   int dir)
 {
-	dma_addr_t flush_addr;
 	dma_addr_t i, start;
 	unsigned int pages;
 
-	flush_addr = dma_addr;
 	pages = iommu_num_pages(dma_addr, size, PAGE_SIZE);
 	dma_addr &= PAGE_MASK;
 	start = dma_addr;