Index: kernel/arch/amd64/include/mm/frame.h
===================================================================
--- kernel/arch/amd64/include/mm/frame.h	(revision 46d8eb9b258c351fc7a0ec7a45162776b8adc3a2)
+++ kernel/arch/amd64/include/mm/frame.h	(revision 3f95377042657539cf9cca0cfec68cd3976ef5e0)
@@ -45,4 +45,5 @@
 #ifndef __ASM__
 extern uintptr_t last_frame;
+extern uintptr_t end_frame;
 extern void frame_arch_init(void);
 extern void physmem_print(void);