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From:   Yafang Shao <laoar.shao@gmail.com>
To:     rostedt@goodmis.org, mingo@redhat.com, peterz@infradead.org,
        paulmck@linux.vnet.ibm.com, josh@joshtriplett.org,
        mathieu.desnoyers@efficios.com, jiangshanlai@gmail.com,
        joel@joelfernandes.org
Cc:     shaoyafang@didiglobal.com, linux-kernel@vger.kernel.org,
        Yafang Shao <laoar.shao@gmail.com>
Subject: [PATCH 2/3] sched/fair: do not expose some tracepoints to user if CONFIG_SCHEDSTATS is not set
Date:   Tue, 26 Mar 2019 09:40:06 +0800
Message-Id: <1553564407-1162-3-git-send-email-laoar.shao@gmail.com>
In-Reply-To: <1553564407-1162-1-git-send-email-laoar.shao@gmail.com>
References: <1553564407-1162-1-git-send-email-laoar.shao@gmail.com>
Sender: linux-kernel-owner@vger.kernel.org
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The tracepoints trace_sched_stat_{iowait, blocked, wait, sleep} should
be not exposed to user if CONFIG_SCHEDSTATS is not set.

Signed-off-by: Yafang Shao <laoar.shao@gmail.com>
---
 include/trace/events/sched.h | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/include/trace/events/sched.h b/include/trace/events/sched.h
index 9a4bdfa..4686c7f 100644
--- a/include/trace/events/sched.h
+++ b/include/trace/events/sched.h
@@ -336,6 +336,7 @@ static inline long __trace_sched_switch_state(bool preempt, struct task_struct *
 		  __entry->pid, __entry->old_pid)
 );
 
+#ifdef CONFIG_SCHEDSTATS
 /*
  * XXX the below sched_stat tracepoints only apply to SCHED_OTHER/BATCH/IDLE
  *     adding sched_stat support to SCHED_FIFO/RR would be welcome.
@@ -395,6 +396,19 @@ static inline long __trace_sched_switch_state(bool preempt, struct task_struct *
 	     TP_PROTO(struct task_struct *tsk, u64 delay),
 	     TP_ARGS(tsk, delay));
 
+#else /* CONFIG_SCHEDSTATS */
+
+TRACE_EVENT_NONE(sched_stat_wait,
+		 TP_PROTO(struct task_struct *tsk, u64 delay));
+TRACE_EVENT_NONE(sched_stat_sleep,
+		 TP_PROTO(struct task_struct *tsk, u64 delay));
+TRACE_EVENT_NONE(sched_stat_iowait,
+		 TP_PROTO(struct task_struct *tsk, u64 delay));
+TRACE_EVENT_NONE(sched_stat_blocked,
+		 TP_PROTO(struct task_struct *tsk, u64 delay));
+
+#endif /* CONFIG_SCHEDSTATS */
+
 /*
  * Tracepoint for accounting runtime (time the task is executing
  * on a CPU).
-- 
1.8.3.1