--- zzzz-none-000/linux-2.6.39.4/include/linux/nmi.h	2011-08-03 19:43:28.000000000 +0000
+++ puma6-arm-6490-729/linux-2.6.39.4/include/linux/nmi.h	2021-11-10 13:23:10.000000000 +0000
@@ -43,6 +43,19 @@
 }
 #endif
 
+#ifdef arch_trigger_allbutself_cpu_backtrace
+static inline bool trigger_allbutself_cpu_backtrace(void)
+{
+	arch_trigger_allbutself_cpu_backtrace();
+	return true;
+}
+#else
+static inline bool trigger_allbutself_cpu_backtrace(void)
+{
+	return false;
+}
+#endif
+
 #ifdef CONFIG_LOCKUP_DETECTOR
 int hw_nmi_is_cpu_stuck(struct pt_regs *);
 u64 hw_nmi_get_sample_period(void);