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-rw-r--r--include/asm-generic/memory_model.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/include/asm-generic/memory_model.h b/include/asm-generic/memory_model.h
index 18546d8eb78e..36fa286adad5 100644
--- a/include/asm-generic/memory_model.h
+++ b/include/asm-generic/memory_model.h
@@ -49,7 +49,7 @@
/* memmap is virtually contigious. */
#define __pfn_to_page(pfn) (vmemmap + (pfn))
-#define __page_to_pfn(page) ((page) - vmemmap)
+#define __page_to_pfn(page) (unsigned long)((page) - vmemmap)
#elif defined(CONFIG_SPARSEMEM)
/*