--- zzzz-none-000/linux-4.1.52/tools/perf/util/unwind.h	2018-05-28 02:26:45.000000000 +0000
+++ bcm63-7530ax-731/linux-4.1.52/tools/perf/util/unwind.h	2022-03-02 11:37:14.000000000 +0000
@@ -14,6 +14,10 @@
 
 typedef int (*unwind_entry_cb_t)(struct unwind_entry *entry, void *arg);
 
+#if defined(CONFIG_BCM_KF_MIPS_4350) && (defined(CONFIG_BCM96838) || defined(CONFIG_BCM96848))
+int libunwind__arch_reg_id(int regnum);
+#endif
+
 #ifdef HAVE_DWARF_UNWIND_SUPPORT
 int unwind__get_entries(unwind_entry_cb_t cb, void *arg,
 			struct thread *thread,