--- zzzz-none-000/linux-3.10.107/arch/powerpc/include/asm/bug.h	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/arch/powerpc/include/asm/bug.h	2021-02-04 17:41:59.000000000 +0000
@@ -133,7 +133,6 @@
 extern void bad_page_fault(struct pt_regs *, unsigned long, int);
 extern void _exception(int, struct pt_regs *, int, unsigned long);
 extern void die(const char *, struct pt_regs *, long);
-extern void print_backtrace(unsigned long *);
 
 #endif /* !__ASSEMBLY__ */