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-rw-r--r--include/asm-generic/pci.h8
1 files changed, 8 insertions, 0 deletions
diff --git a/include/asm-generic/pci.h b/include/asm-generic/pci.h
index c36a77d3bf4..515c6e2e321 100644
--- a/include/asm-generic/pci.h
+++ b/include/asm-generic/pci.h
@@ -52,4 +52,12 @@ static inline int pci_get_legacy_ide_irq(struct pci_dev *dev, int channel)
}
#endif /* HAVE_ARCH_PCI_GET_LEGACY_IDE_IRQ */
+/*
+ * By default, assume that no iommu is in use and that the PCI
+ * space is mapped to address physical 0.
+ */
+#ifndef PCI_DMA_BUS_IS_PHYS
+#define PCI_DMA_BUS_IS_PHYS (1)
#endif
+
+#endif /* _ASM_GENERIC_PCI_H */