x86: move pci fixup to pci-dma.c

via_no_dac provides a fixup that is the same for both
architectures. Move it to pci-dma.c.

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

3 files changed, 18 insertions, 28 deletions

diff --git a/arch/x86/kernel/pci-dma.c b/arch/x86/kernel/pci-dma.c
index 91443361cb67..48cccbe51aa5 100644
--- a/arch/x86/kernel/pci-dma.c
+++ b/arch/x86/kernel/pci-dma.c
@@ -1,12 +1,16 @@
 #include <linux/dma-mapping.h>
 #include <linux/dmar.h>
 #include <linux/bootmem.h>
+#include <linux/pci.h>
 
 #include <asm/proto.h>
 #include <asm/dma.h>
 #include <asm/gart.h>
 #include <asm/calgary.h>
 
+int forbid_dac __read_mostly;
+EXPORT_SYMBOL(forbid_dac);
+
 const struct dma_mapping_ops *dma_ops;
 EXPORT_SYMBOL(dma_ops);
 
@@ -121,3 +125,17 @@ void pci_iommu_shutdown(void)
 }
 /* Must execute after PCI subsystem */
 fs_initcall(pci_iommu_init);
+
+#ifdef CONFIG_PCI
+/* Many VIA bridges seem to corrupt data for DAC. Disable it here */
+
+static __devinit void via_no_dac(struct pci_dev *dev)
+{
+        if ((dev->class >> 8) == PCI_CLASS_BRIDGE_PCI && forbid_dac == 0) {
+                printk(KERN_INFO "PCI: VIA PCI bridge detected."
+                                 "Disabling DAC.\n");
+                forbid_dac = 1;
+        }
+}
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_VIA, PCI_ANY_ID, via_no_dac);
+#endif
diff --git a/arch/x86/kernel/pci-dma_32.c b/arch/x86/kernel/pci-dma_32.c
index 9e8297657c32..6543bb30b65d 100644
--- a/arch/x86/kernel/pci-dma_32.c
+++ b/arch/x86/kernel/pci-dma_32.c
@@ -157,9 +157,6 @@ EXPORT_SYMBOL(dma_mark_declared_memory_occupied);
 #ifdef CONFIG_PCI
 /* Many VIA bridges seem to corrupt data for DAC. Disable it here */
 
-int forbid_dac;
-EXPORT_SYMBOL(forbid_dac);
-
 int
 dma_supported(struct device *dev, u64 mask)
 {
@@ -182,16 +179,6 @@ dma_supported(struct device *dev, u64 mask)
 }
 EXPORT_SYMBOL(dma_supported);
 
-
-static __devinit void via_no_dac(struct pci_dev *dev)
-{
-        if ((dev->class >> 8) == PCI_CLASS_BRIDGE_PCI && forbid_dac == 0) {
-                printk(KERN_INFO "PCI: VIA PCI bridge detected. Disabling DAC.\n");
-                forbid_dac = 1;
-        }
-}
-DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_VIA, PCI_ANY_ID, via_no_dac);
-
 static int check_iommu(char *s)
 {
         if (!strcmp(s, "usedac")) {
diff --git a/arch/x86/kernel/pci-dma_64.c b/arch/x86/kernel/pci-dma_64.c
index 6b204cc42890..7820675a688a 100644
--- a/arch/x86/kernel/pci-dma_64.c
+++ b/arch/x86/kernel/pci-dma_64.c
@@ -161,8 +161,6 @@ void dma_free_coherent(struct device *dev, size_t size,
 }
 EXPORT_SYMBOL(dma_free_coherent);
 
-static int forbid_dac __read_mostly;
-
 int dma_supported(struct device *dev, u64 mask)
 {
 #ifdef CONFIG_PCI
@@ -270,16 +268,3 @@ static __init int iommu_setup(char *p)
         return 0;
 }
 early_param("iommu", iommu_setup);
-
-#ifdef CONFIG_PCI
-/* Many VIA bridges seem to corrupt data for DAC. Disable it here */
-
-static __devinit void via_no_dac(struct pci_dev *dev)
-{
-        if ((dev->class >> 8) == PCI_CLASS_BRIDGE_PCI && forbid_dac == 0) {
-                printk(KERN_INFO "PCI: VIA PCI bridge detected. Disabling DAC.\n");
-                forbid_dac = 1;
-        }
-}
-DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_VIA, PCI_ANY_ID, via_no_dac);
-#endif