From: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Date: Tue, 20 Sep 2011 16:21:40 +0000 (-0400)
Subject: Mark __tp_cb_data as possibly unused for backward compat API
X-Git-Tag: v0.16~5
X-Git-Url: https://git.lttng.org./?a=commitdiff_plain;h=34dca3cc6e0b230c988b16117b967a094560f4ed;p=ust.git

Mark __tp_cb_data as possibly unused for backward compat API

Thanks to Lluís Vilanova for proposing this.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
---

diff --git a/include/ust/tracepoint.h b/include/ust/tracepoint.h
index 9463e40..5e7f9d8 100644
--- a/include/ust/tracepoint.h
+++ b/include/ust/tracepoint.h
@@ -70,12 +70,13 @@ struct tracepoint {
 /*
  * it_func[0] is never NULL because there is at least one element in the array
  * when the array itself is non NULL.
+ * __attribute__((unused)) is for backward compatibility API.
  */
 #define __DO_TRACE(tp, proto, args)					\
 	do {								\
 		struct tracepoint_probe *__tp_it_probe_ptr;		\
 		void *__tp_it_func;					\
-		void *__tp_cb_data;					\
+		void *__tp_cb_data __attribute__((unused));		\
 									\
 		rcu_read_lock();					\
 		__tp_it_probe_ptr = rcu_dereference((tp)->probes);	\