[RFC][PATCH 8/8] rcu/ftrace: Add FTRACE_UNSAFE_RCU() to unsafe RCU functions

[Steven Rostedt <rostedt@goodmis.org>]

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From: "Steven Rostedt (Red Hat)" <rostedt@goodmis.org>

Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
---
 kernel/rcutree.c |    4 ++++
 1 file changed, 4 insertions(+)

diff --git a/kernel/rcutree.c b/kernel/rcutree.c
index 068de3a..9abf305 100644
--- a/kernel/rcutree.c
+++ b/kernel/rcutree.c
@@ -53,6 +53,7 @@
 #include <linux/delay.h>
 #include <linux/stop_machine.h>
 #include <linux/random.h>
+#include <linux/ftrace.h>
 
 #include "rcutree.h"
 #include <trace/events/rcu.h>
@@ -373,6 +374,7 @@ static void rcu_eqs_enter_common(struct rcu_dynticks *rdtp, long long oldval,
 	rcu_lockdep_assert(!lock_is_held(&rcu_sched_lock_map),
 			   "Illegal idle entry in RCU-sched read-side critical section.");
 }
+FTRACE_UNSAFE_RCU(rcu_eqs_enter_common);
 
 /*
  * Enter an RCU extended quiescent state, which can be either the
@@ -392,6 +394,7 @@ static void rcu_eqs_enter(bool user)
 		rdtp->dynticks_nesting -= DYNTICK_TASK_NEST_VALUE;
 	rcu_eqs_enter_common(rdtp, oldval, user);
 }
+FTRACE_UNSAFE_RCU(rcu_eqs_enter);
 
 /**
  * rcu_idle_enter - inform RCU that current CPU is entering idle
@@ -565,6 +568,7 @@ void rcu_user_exit(void)
 {
 	rcu_eqs_exit(1);
 }
+FTRACE_UNSAFE_RCU(rcu_user_exit);
 
 /**
  * rcu_user_exit_after_irq - inform RCU that we won't resume to userspace
-- 
1.7.10.4