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-rw-r--r--include/asm-generic/memory_model.h6
1 files changed, 6 insertions, 0 deletions
diff --git a/include/asm-generic/memory_model.h b/include/asm-generic/memory_model.h
index 14909b0b9..4b4b056a6 100644
--- a/include/asm-generic/memory_model.h
+++ b/include/asm-generic/memory_model.h
@@ -69,6 +69,12 @@
})
#endif /* CONFIG_FLATMEM/DISCONTIGMEM/SPARSEMEM */
+/*
+ * Convert a physical address to a Page Frame Number and back
+ */
+#define __phys_to_pfn(paddr) ((unsigned long)((paddr) >> PAGE_SHIFT))
+#define __pfn_to_phys(pfn) PFN_PHYS(pfn)
+
#define page_to_pfn __page_to_pfn
#define pfn_to_page __pfn_to_page