[POWERPC] Create and use get_pci_dma_ops()

This allows us to hide pci_dma_ops.

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>

3 files changed, 10 insertions, 5 deletions

diff --git a/arch/powerpc/kernel/pci_64.c b/arch/powerpc/kernel/pci_64.c
index 73d509343d5b..db1d40ef7d60 100644
--- a/arch/powerpc/kernel/pci_64.c
+++ b/arch/powerpc/kernel/pci_64.c
@@ -61,8 +61,7 @@ void iSeries_pcibios_init(void);
 
 LIST_HEAD(hose_list);
 
-struct dma_mapping_ops *pci_dma_ops;
-EXPORT_SYMBOL(pci_dma_ops);
+static struct dma_mapping_ops *pci_dma_ops;
 
 int global_phb_number;          /* Global phb counter */
 
@@ -75,6 +74,12 @@ void set_pci_dma_ops(struct dma_mapping_ops *dma_ops)
         pci_dma_ops = dma_ops;
 }
 
+struct dma_mapping_ops *get_pci_dma_ops(void)
+{
+        return pci_dma_ops;
+}
+EXPORT_SYMBOL(get_pci_dma_ops);
+
 static void fixup_broken_pcnet32(struct pci_dev* dev)
 {
         if ((dev->class>>8 == PCI_CLASS_NETWORK_ETHERNET)) {
diff --git a/arch/powerpc/platforms/cell/iommu.c b/arch/powerpc/platforms/cell/iommu.c
index d0e02ea1d538..7c953cc022f6 100644
--- a/arch/powerpc/platforms/cell/iommu.c
+++ b/arch/powerpc/platforms/cell/iommu.c
@@ -496,7 +496,7 @@ static void cell_dma_dev_setup(struct device *dev)
         struct dev_archdata *archdata = &dev->archdata;
 
         /* If we run without iommu, no need to do anything */
-        if (pci_dma_ops == &dma_direct_ops)
+        if (get_pci_dma_ops() == &dma_direct_ops)
                 return;
 
         /* Current implementation uses the first window available in that
@@ -530,7 +530,7 @@ static int cell_of_bus_notify(struct notifier_block *nb, unsigned long action,
                 return 0;
 
         /* We use the PCI DMA ops */
-        dev->archdata.dma_ops = pci_dma_ops;
+        dev->archdata.dma_ops = get_pci_dma_ops();
 
         cell_dma_dev_setup(dev);
 
diff --git a/arch/powerpc/platforms/celleb/iommu.c b/arch/powerpc/platforms/celleb/iommu.c
index fecc4ffd475e..e94de6a24622 100644
--- a/arch/powerpc/platforms/celleb/iommu.c
+++ b/arch/powerpc/platforms/celleb/iommu.c
@@ -80,7 +80,7 @@ static int celleb_of_bus_notify(struct notifier_block *nb,
         if (action != BUS_NOTIFY_ADD_DEVICE)
                 return 0;
 
-        dev->archdata.dma_ops = pci_dma_ops;
+        dev->archdata.dma_ops = get_pci_dma_ops();
 
         return 0;
 }