[PATCH 2/2] selftests/mqueue: fix -Wunused-variable warning for 'usage' in mq_open_tests

[Eva Kurchatova]

From: Konstantin Khorenko <khorenko@xxxxxxxxxxxxx>

  mq_open_tests.c:38:14: warning: 'usage' defined but not used
  [-Wunused-variable]
     38 | static char *usage =
        |              ^~~~~

Mark 'usage' with __attribute__((unused)) to fix the warning.
The variable is kept for documentation purposes.

Signed-off-by: Konstantin Khorenko <khorenko@xxxxxxxxxxxxx>
---
 tools/testing/selftests/mqueue/mq_open_tests.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/testing/selftests/mqueue/mq_open_tests.c b/tools/testing/selftests/mqueue/mq_open_tests.c
index b16029c40c0f..f7955507917b 100644
--- a/tools/testing/selftests/mqueue/mq_open_tests.c
+++ b/tools/testing/selftests/mqueue/mq_open_tests.c
@@ -35,7 +35,7 @@
 
 #include "kselftest.h"
 
-static char *usage =
+static char __attribute__((unused)) *usage =
 "Usage:\n"
 "  %s path\n"
 "\n"
-- 
2.54.0