[ltt-dev] lttng: Fix possible memory leak in ltt-tracer.c

[Wei Yongjun]

ltt_traces <../cgi-bin/global.cgi?pattern=ltt_traces&type=symbol>.head 
<../cgi-bin/global.cgi?pattern=head&type=symbol> is saved to tmp, and is 
empty after the following code:
    INIT_LIST_HEAD(&ltt_traces.head);
So remove the tracers will take no effect.

This patch fix to remove tracers used tmp.

Signed-off-by: Wei Yongjun <yjwei at cn.fujitsu.com>

diff --git a/ltt/ltt-tracer.c b/ltt/ltt-tracer.c
index bc8251b..6109fb6 100644
--- a/ltt/ltt-tracer.c
+++ b/ltt/ltt-tracer.c
@@ -818,7 +818,7 @@ static void __exit ltt_exit(void)
 	synchronize_sched();
 	/* Safe iteration is now permitted. It does not have to be RCU-safe
 	 * because no readers are left. */
-	list_for_each_safe(pos, n, &ltt_traces.head) {
+	list_for_each_safe(pos, n, &tmp) {
 		trace = container_of(pos, struct ltt_trace_struct, list);
 		/* _ltt_trace_destroy does a synchronize_sched() */
 		_ltt_trace_destroy(trace);