From: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Date: Mon, 21 Mar 2011 21:55:30 +0000 (-0400)
Subject: Cleanup: remove unused value warning
X-Git-Tag: v0.6.0~49
X-Git-Url: https://git.lttng.org./?a=commitdiff_plain;h=85b577030e0dd244ed2d42aa5196a088e1e64dbb;p=userspace-rcu.git

Cleanup: remove unused value warning

return value of cmpxchg is purposefully unused in
_cds_lfq_enqueue_rcu(). Cast it to (void) to remove the compiler
warning.

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

diff --git a/urcu/rculfqueue-static.h b/urcu/rculfqueue-static.h
index 95294f9..d7c359f 100644
--- a/urcu/rculfqueue-static.h
+++ b/urcu/rculfqueue-static.h
@@ -86,7 +86,7 @@ void _cds_lfq_enqueue_rcu(struct cds_lfq_queue_rcu *q, struct cds_lfq_node_rcu *
 			 * Now move tail (another enqueue might beat
 			 * us to it, that's fine).
 			 */
-			uatomic_cmpxchg(&q->tail, tail, node);
+			(void) uatomic_cmpxchg(&q->tail, tail, node);
 			rcu_read_unlock();
 			return;
 		} else {
@@ -94,7 +94,7 @@ void _cds_lfq_enqueue_rcu(struct cds_lfq_queue_rcu *q, struct cds_lfq_node_rcu *
 			 * Failure to append to current tail. Help moving tail
 			 * further and retry.
 			 */
-			uatomic_cmpxchg(&q->tail, tail, next);
+			(void) uatomic_cmpxchg(&q->tail, tail, next);
 			rcu_read_unlock();
 			continue;
 		}