[PATCH] perf_event: fix compile error

[Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>]

cc1: warnings being treated as errors
builtin-probe.c: In function ‘cmd_probe’:
builtin-probe.c:163: error: unused variable ‘fd’

Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
---
 tools/perf/builtin-probe.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/tools/perf/builtin-probe.c b/tools/perf/builtin-probe.c
index b5d15cf..64ea038 100644
--- a/tools/perf/builtin-probe.c
+++ b/tools/perf/builtin-probe.c
@@ -160,7 +160,8 @@ static const struct option options[] = {
 
 int cmd_probe(int argc, const char **argv, const char *prefix __used)
 {
-	int i, j, fd, ret;
+	int i, j, ret;
+	int fd __used;
 	struct probe_point *pp;
 
 	argc = parse_options(argc, argv, options, probe_usage,
-- 
1.6.1.2