x86 gart: rename symbols only used for the GART implementation

This patch renames the 4 symbols iommu_hole_init(), iommu_aperture,
iommu_aperture_allowed, iommu_aperture_disabled. All these symbols are only
used for the GART implementation of IOMMUs.

It adds and additional gart_ prefix to them.
Signed-off-by: NJoerg Roedel <joerg.roedel@amd.com>
Signed-off-by: NIngo Molnar <mingo@elte.hu>
Signed-off-by: NThomas Gleixner <tglx@linutronix.de>

arch/x86/kernel/aperture_64.c

@@ -25,9 +25,9 @@
 #include <asm/dma.h>
 #include <asm/k8.h>
 
-int iommu_aperture;
-int iommu_aperture_disabled __initdata = 0;
-int iommu_aperture_allowed __initdata = 0;
+int gart_iommu_aperture;
+int gart_iommu_aperture_disabled __initdata = 0;
+int gart_iommu_aperture_allowed __initdata = 0;
 
 int fallback_aper_order __initdata = 1; /* 64MB */
 int fallback_aper_force __initdata = 0; 
@@ -204,14 +204,15 @@ static __u32 __init search_agp_bridge(u32 *order, int *valid_agp)
 	return 0;
 }
 
-void __init iommu_hole_init(void) 
+void __init gart_iommu_hole_init(void)
 { 
 	int fix, num; 
 	u32 aper_size, aper_alloc = 0, aper_order = 0, last_aper_order = 0;
 	u64 aper_base, last_aper_base = 0;
 	int valid_agp = 0;
 
-	if (iommu_aperture_disabled || !fix_aperture || !early_pci_allowed())
+	if (gart_iommu_aperture_disabled || !fix_aperture ||
+	    !early_pci_allowed())
 		return;
 
 	printk(KERN_INFO  "Checking aperture...\n");
@@ -222,7 +223,7 @@ void __init iommu_hole_init(void)
 			continue;
 
 		iommu_detected = 1;
-		iommu_aperture = 1; 
+		gart_iommu_aperture = 1;
 
 		aper_order = (read_pci_config(0, num, 3, 0x90) >> 1) & 7; 
 		aper_size = (32 * 1024 * 1024) << aper_order; 

arch/x86/kernel/early-quirks.c

@@ -25,11 +25,11 @@ static void __init via_bugs(void)
 {
 #ifdef CONFIG_GART_IOMMU
 	if ((end_pfn > MAX_DMA32_PFN ||  force_iommu) &&
-	    !iommu_aperture_allowed) {
+	    !gart_iommu_aperture_allowed) {
 		printk(KERN_INFO
 		       "Looks like a VIA chipset. Disabling IOMMU."
 		       " Override with iommu=allowed\n");
-		iommu_aperture_disabled = 1;
+		gart_iommu_aperture_disabled = 1;
 	}
 #endif
 }

arch/x86/kernel/pci-dma_64.c

@@ -299,7 +299,7 @@ void __init pci_iommu_alloc(void)
 	 * fall-back/fail-over reasons
 	 */
 #ifdef CONFIG_GART_IOMMU
-	iommu_hole_init();
+	gart_iommu_hole_init();
 #endif
 
 #ifdef CONFIG_CALGARY_IOMMU

arch/x86/kernel/pci-gart_64.c

@@ -627,12 +627,12 @@ void __init gart_iommu_init(void)
 		return;
 
 	/* Did we detect a different HW IOMMU? */
-	if (iommu_detected && !iommu_aperture)
+	if (iommu_detected && !gart_iommu_aperture)
 		return;
 
 	if (no_iommu ||
 	    (!force_iommu && end_pfn <= MAX_DMA32_PFN) ||
-	    !iommu_aperture ||
+	    !gart_iommu_aperture ||
 	    (no_agp && init_k8_gatt(&info) < 0)) {
 		if (end_pfn > MAX_DMA32_PFN) {
 			printk(KERN_ERR "WARNING more than 4GB of memory "
@@ -733,9 +733,9 @@ void __init gart_parse_options(char *p)
 		fix_aperture = 0;
 	/* duplicated from pci-dma.c */
 	if (!strncmp(p,"force",5))
-		iommu_aperture_allowed = 1;
+		gart_iommu_aperture_allowed = 1;
 	if (!strncmp(p,"allowed",7))
-		iommu_aperture_allowed = 1;
+		gart_iommu_aperture_allowed = 1;
 	if (!strncmp(p, "memaper", 7)) {
 		fallback_aper_force = 1;
 		p += 7;

include/asm-x86/gart.h

@@ -9,16 +9,16 @@ extern int iommu_detected;
 extern void gart_iommu_init(void);
 extern void gart_iommu_shutdown(void);
 extern void __init gart_parse_options(char *);
-extern void iommu_hole_init(void);
+extern void gart_iommu_hole_init(void);
 extern int fallback_aper_order;
 extern int fallback_aper_force;
-extern int iommu_aperture;
-extern int iommu_aperture_allowed;
-extern int iommu_aperture_disabled;
+extern int gart_iommu_aperture;
+extern int gart_iommu_aperture_allowed;
+extern int gart_iommu_aperture_disabled;
 extern int fix_aperture;
 #else
-#define iommu_aperture 0
-#define iommu_aperture_allowed 0
+#define gart_iommu_aperture 0
+#define gart_iommu_aperture_allowed 0
 
 static inline void gart_iommu_shutdown(void)
 {