[LTP] [PATCH] pty03: Calculate test case count from test case array length

[Martin Doucha]

Use ARRAY_SIZE() to calculate test case count so that the number
does not need to be adjusted manually if anyone adds or removes
another line discipline to the list.

Signed-off-by: Martin Doucha <mdoucha@suse.cz>
---

The actual test cases start at ldiscs[1]. ldiscs[0] is a special value
for initializing the file descriptor before setting the real line
discipline.

 testcases/kernel/pty/pty03.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/testcases/kernel/pty/pty03.c b/testcases/kernel/pty/pty03.c
index 99c659264..d4da24265 100644
--- a/testcases/kernel/pty/pty03.c
+++ b/testcases/kernel/pty/pty03.c
@@ -146,7 +146,7 @@ static void cleanup(void)
 
 static struct tst_test test = {
 	.test = do_test,
-	.tcnt = 9,
+	.tcnt = ARRAY_SIZE(ldiscs) - 1,
 	.setup = setup,
 	.cleanup = cleanup,
 	.needs_root = 1,
-- 
2.53.0