x86: pci-dma_64.c: cleanups

This patch contains the following cleanups:
- make the needlessly global iommu_setup() static
- remove the unused EXPORT_SYMBOL(iommu_merge)
Signed-off-by: NAdrian Bunk <bunk@kernel.org>
Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
Signed-off-by: NIngo Molnar <mingo@elte.hu>
Signed-off-by: NThomas Gleixner <tglx@linutronix.de>

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;
 

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