Index: kernel/arch/arm32/include/mm/frame.h
===================================================================
--- kernel/arch/arm32/include/mm/frame.h	(revision 2686705497cc6722c2651445e64fb7d5c770863f)
+++ kernel/arch/arm32/include/mm/frame.h	(revision 12cb03dd6e73558b6ca75313281ad3e66041b239)
@@ -61,6 +61,4 @@
 #endif
 
-extern uintptr_t last_frame;
-
 extern void frame_low_arch_init(void);
 extern void frame_high_arch_init(void);