diff --git a/include/linux/mm.h b/include/linux/mm.h
index fd85235eeed3..90ff007c8317 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -115,6 +115,14 @@ extern int mmap_rnd_compat_bits __read_mostly;
 #define __pa_symbol(x)  __pa(RELOC_HIDE((unsigned long)(x), 0))
 #endif
 
+#ifndef __va_function
+#define __va_function(x) (x)
+#endif
+
+#ifndef __pa_function
+#define __pa_function(x) __pa_symbol(x)
+#endif
+
 #ifndef page_to_virt
 #define page_to_virt(x)	__va(PFN_PHYS(page_to_pfn(x)))
 #endif