x86: merge dma_supported

The code for both arches are very similar, so this patch merge them.

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

1 files changed, 0 insertions, 24 deletions

diff --git a/arch/x86/kernel/pci-dma_32.c b/arch/x86/kernel/pci-dma_32.c
index 6543bb30b65d..1d4091af4417 100644
--- a/arch/x86/kernel/pci-dma_32.c
+++ b/arch/x86/kernel/pci-dma_32.c
@@ -155,30 +155,6 @@ void *dma_mark_declared_memory_occupied(struct device *dev,
 EXPORT_SYMBOL(dma_mark_declared_memory_occupied);
 
 #ifdef CONFIG_PCI
-/* Many VIA bridges seem to corrupt data for DAC. Disable it here */
-
-int
-dma_supported(struct device *dev, u64 mask)
-{
-        /*
-         * we fall back to GFP_DMA when the mask isn't all 1s,
-         * so we can't guarantee allocations that must be
-         * within a tighter range than GFP_DMA..
-         */
-        if (mask < 0x00ffffff)
-                return 0;
-
-        /* Work around chipset bugs */
-        if (forbid_dac > 0 && mask > 0xffffffffULL)
-                return 0;
-
-        if (dma_ops->dma_supported)
-                return dma_ops->dma_supported(dev, mask);
-
-        return 1;
-}
-EXPORT_SYMBOL(dma_supported);
-
 static int check_iommu(char *s)
 {
         if (!strcmp(s, "usedac")) {