[PATCH -next] coresight: etm: perf: Make symbol 'format_attr_contextid' static

['Wei Yongjun]

From: Wei Yongjun <weiyongjun1@xxxxxxxxxx>

The sparse tool complains as follows:

drivers/hwtracing/coresight/coresight-etm-perf.c:61:25: warning:
 symbol 'format_attr_contextid' was not declared. Should it be static?

This symbol is not used outside of coresight-etm-perf.c, so this
commit marks it static.

Reported-by: Hulk Robot <hulkci@xxxxxxxxxx>
Signed-off-by: Wei Yongjun <weiyongjun1@xxxxxxxxxx>
---
 drivers/hwtracing/coresight/coresight-etm-perf.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/hwtracing/coresight/coresight-etm-perf.c b/drivers/hwtracing/coresight/coresight-etm-perf.c
index 0f603b4094f2..bdbb77334329 100644
--- a/drivers/hwtracing/coresight/coresight-etm-perf.c
+++ b/drivers/hwtracing/coresight/coresight-etm-perf.c
@@ -58,7 +58,7 @@ static ssize_t format_attr_contextid_show(struct device *dev,
 	return sprintf(page, "config:%d\n", pid_fmt);
 }
 
-struct device_attribute format_attr_contextid =
+static struct device_attribute format_attr_contextid =
 	__ATTR(contextid, 0444, format_attr_contextid_show, NULL);
 
 static struct attribute *etm_config_formats_attr[] = {