Index: kernel/arch/ppc32/include/mm/frame.h
===================================================================
--- kernel/arch/ppc32/include/mm/frame.h	(revision ddcc8a0d63f8ff64bcff9151c6d65b103343d22c)
+++ kernel/arch/ppc32/include/mm/frame.h	(revision b4e59b35396fd1c4445d74278acf9652804a140c)
@@ -44,6 +44,4 @@
 #include <trace.h>
 
-extern uintptr_t last_frame;
-
 NO_TRACE static inline uint32_t physmem_top(void)
 {