diff --git a/include/linux/gfp.h b/include/linux/gfp.h
index 581e74b..052a5b6 100644
--- a/include/linux/gfp.h
+++ b/include/linux/gfp.h
@@ -391,4 +391,12 @@
 }
 #endif /* CONFIG_PM_SLEEP */
 
+#ifdef CONFIG_CMA
+
+/* The below functions must be run on a range from a single zone. */
+extern int alloc_contig_range(unsigned long start, unsigned long end);
+extern void free_contig_range(unsigned long pfn, unsigned nr_pages);
+
+#endif
+
 #endif /* __LINUX_GFP_H */