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-rw-r--r--arch/x86/kernel/pci-dma_64.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/kernel/pci-dma_64.c b/arch/x86/kernel/pci-dma_64.c
index b2b42bdb0a15..afaf9f12c032 100644
--- a/arch/x86/kernel/pci-dma_64.c
+++ b/arch/x86/kernel/pci-dma_64.c
@@ -11,7 +11,7 @@
#include <asm/iommu.h>
#include <asm/calgary.h>
-int iommu_merge __read_mostly = 0;
+int iommu_merge __read_mostly = 1;
EXPORT_SYMBOL(iommu_merge);
dma_addr_t bad_dma_address __read_mostly;