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-rw-r--r--arch/ia64/kernel/dma-mapping.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/ia64/kernel/dma-mapping.c b/arch/ia64/kernel/dma-mapping.c
index 7060e13fa421..086a2aeb0404 100644
--- a/arch/ia64/kernel/dma-mapping.c
+++ b/arch/ia64/kernel/dma-mapping.c
@@ -1,5 +1,8 @@
#include <linux/dma-mapping.h>
+/* Set this to 1 if there is a HW IOMMU in the system */
+int iommu_detected __read_mostly;
+
struct dma_map_ops *dma_ops;
EXPORT_SYMBOL(dma_ops);
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