diff --git a/arch/x86/kernel/pci-dma_64.c b/arch/x86/kernel/pci-dma_64.c
index 5552d23d23c27558ec32f64930f14f6870181ba5..a82473d192a31b830eea331c07fb043dd9849343 100644
--- a/arch/x86/kernel/pci-dma_64.c
+++ b/arch/x86/kernel/pci-dma_64.c
@@ -13,7 +13,6 @@
 #include <asm/calgary.h>
 
 int iommu_merge __read_mostly = 0;
-EXPORT_SYMBOL(iommu_merge);
 
 dma_addr_t bad_dma_address __read_mostly;
 EXPORT_SYMBOL(bad_dma_address);
@@ -230,7 +229,7 @@ EXPORT_SYMBOL(dma_set_mask);
  * See <Documentation/x86_64/boot-options.txt> for the iommu kernel parameter
  * documentation.
  */
-__init int iommu_setup(char *p)
+static __init int iommu_setup(char *p)
 {
 	iommu_merge = 1;
 
diff --git a/include/asm-x86/pci_64.h b/include/asm-x86/pci_64.h
index ef54226a9325a926a1c482ee7ce03d1410478f7b..374690314539c6858ad465396e6ba8397048f8da 100644
--- a/include/asm-x86/pci_64.h
+++ b/include/asm-x86/pci_64.h
@@ -26,7 +26,6 @@ extern int (*pci_config_write)(int seg, int bus, int dev, int fn, int reg, int l
 
 
 extern void pci_iommu_alloc(void);
-extern int iommu_setup(char *opt);
 
 /* The PCI address space does equal the physical memory
  * address space.  The networking and block device layers use