x86: Kill bad_dma_address variable

[karo-tx-linux.git] / arch / x86 / include / asm / dma-mapping.h

diff --git a/arch/x86/include/asm/dma-mapping.h b/arch/x86/include/asm/dma-mapping.h
index 6a25d5d4283640f6a2ec76add7581a4bfd47e610..0f6c02f3b7d4f26126a590e3df2408c2af6c5d8c 100644 (file)
--- a/arch/x86/include/asm/dma-mapping.h
+++ b/arch/x86/include/asm/dma-mapping.h
@@ -20,7 +20,8 @@
 # define ISA_DMA_BIT_MASK DMA_BIT_MASK(32)
 #endif
 
-extern dma_addr_t bad_dma_address;
+#define DMA_ERROR_CODE 0
+
 extern int iommu_merge;
 extern struct device x86_dma_fallback_dev;
 extern int panic_on_overflow;
@@ -48,7 +49,7 @@ static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
        if (ops->mapping_error)
                return ops->mapping_error(dev, dma_addr);
 
-       return (dma_addr == bad_dma_address);
+       return (dma_addr == DMA_ERROR_CODE);
 }
 
 #define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f)