From: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Date: Fri, 26 Aug 2011 15:52:22 +0000 (-0400)
Subject: lib ring buffer must take private pointer copy before decrementing refcount
X-Git-Tag: v2.0-pre9~69^2
X-Git-Url: http://git.liburcu.org/?a=commitdiff_plain;h=ba1d61bc8909b4796516221bf97130631e8d0bc6;p=lttng-modules.git

lib ring buffer must take private pointer copy before decrementing refcount

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

diff --git a/lib/ringbuffer/ring_buffer_frontend.c b/lib/ringbuffer/ring_buffer_frontend.c
index 6a4c241e..3003dd83 100644
--- a/lib/ringbuffer/ring_buffer_frontend.c
+++ b/lib/ringbuffer/ring_buffer_frontend.c
@@ -752,8 +752,8 @@ void *channel_destroy(struct channel *chan)
 	ACCESS_ONCE(chan->finalized) = 1;
 	wake_up_interruptible(&chan->hp_wait);
 	wake_up_interruptible(&chan->read_wait);
-	kref_put(&chan->ref, channel_release);
 	priv = chan->backend.priv;
+	kref_put(&chan->ref, channel_release);
 	return priv;
 }
 EXPORT_SYMBOL_GPL(channel_destroy);