added DMA_40BIT_MASK needed by backport tg3.c driver

diff --git a/include/linux/dma-mapping.h b/include/linux/dma-mapping.h
index 806c305..60cfa53 100644 (file)
--- a/include/linux/dma-mapping.h
+++ b/include/linux/dma-mapping.h
@@ -14,6 +14,7 @@ enum dma_data_direction {
 };
 
 #define DMA_64BIT_MASK 0xffffffffffffffffULL
+#define DMA_40BIT_MASK 0x000000ffffffffffULL
 #define DMA_32BIT_MASK 0x00000000ffffffffULL
 
 #include <asm/dma-mapping.h>