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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 30d8d33491dd..52226e14bd7d 100644
--- a/include/asm-generic/memory_model.h
+++ b/include/asm-generic/memory_model.h
@@ -46,6 +46,12 @@
__pgdat->node_start_pfn; \
})
+#elif defined(CONFIG_SPARSEMEM_VMEMMAP)
+
+/* memmap is virtually contigious. */
+#define __pfn_to_page(pfn) (vmemmap + (pfn))
+#define __page_to_pfn(page) ((page) - vmemmap)
+
#elif defined(CONFIG_SPARSEMEM)
/*
* Note: section's mem_map is encorded to reflect its start_pfn.