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-rw-r--r--include/linux/ftrace.h8
1 files changed, 8 insertions, 0 deletions
diff --git a/include/linux/ftrace.h b/include/linux/ftrace.h
index 0d3714e7110b..017ab44d572a 100644
--- a/include/linux/ftrace.h
+++ b/include/linux/ftrace.h
@@ -120,4 +120,12 @@ static inline void tracer_disable(void)
# define trace_preempt_off(a0, a1) do { } while (0)
#endif
+#ifdef CONFIG_CONTEXT_SWITCH_TRACER
+extern void
+ftrace_special(unsigned long arg1, unsigned long arg2, unsigned long arg3);
+#else
+static inline void
+ftrace_special(unsigned long arg1, unsigned long arg2, unsigned long arg3) { }
+#endif
+
#endif /* _LINUX_FTRACE_H */
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