ftrace: fix __trace_special()

Signed-off-by: NIngo Molnar <mingo@elte.hu>
Signed-off-by: NThomas Gleixner <tglx@linutronix.de>

include/linux/sched.h

@@ -2119,6 +2119,18 @@ static inline void arch_pick_mmap_layout(struct mm_struct *mm)
 }
 #endif
 
+#ifdef CONFIG_TRACING
+extern void
+__trace_special(void *__tr, void *__data,
+		unsigned long arg1, unsigned long arg2, unsigned long arg3);
+#else
+static inline void
+__trace_special(void *__tr, void *__data,
+		unsigned long arg1, unsigned long arg2, unsigned long arg3)
+{
+}
+#endif
+
 #ifdef CONFIG_CONTEXT_SWITCH_TRACER
 extern void
 ftrace_ctx_switch(void *rq, struct task_struct *prev, struct task_struct *next);
@@ -2126,9 +2138,6 @@ extern void
 ftrace_wake_up_task(void *rq, struct task_struct *wakee,
 		    struct task_struct *curr);
 extern void ftrace_all_fair_tasks(void *__rq, void *__tr, void *__data);
-extern void
-__trace_special(void *__tr, void *__data,
-		unsigned long arg1, unsigned long arg2, unsigned long arg3);
 #else
 static inline void
 ftrace_ctx_switch(void *rq, struct task_struct *prev, struct task_struct *next)
@@ -2146,11 +2155,6 @@ ftrace_wake_up_task(void *rq, struct task_struct *wakee,
 static inline void ftrace_all_fair_tasks(void *__rq, void *__tr, void *__data)
 {
 }
-static inline void
-__trace_special(void *__tr, void *__data,
-		unsigned long arg1, unsigned long arg2, unsigned long arg3)
-{
-}
 #endif
 
 extern long sched_setaffinity(pid_t pid, const cpumask_t *new_mask);

kernel/trace/trace.c

@@ -670,8 +670,6 @@ ftrace(struct trace_array *tr, struct trace_array_cpu *data,
 		trace_function(tr, data, ip, parent_ip, flags);
 }
 
-#ifdef CONFIG_CONTEXT_SWITCH_TRACER
-
 void
 __trace_special(void *__tr, void *__data,
 		unsigned long arg1, unsigned long arg2, unsigned long arg3)
@@ -693,8 +691,6 @@ __trace_special(void *__tr, void *__data,
 	trace_wake_up();
 }
 
-#endif
-
 void __trace_stack(struct trace_array *tr,
 		   struct trace_array_cpu *data,
 		   unsigned long flags,