linux-kernel - [PATCH v3 8/9] selftests: vDSO: vdso_test

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Message-Id: <20250611-selftests-vdso-fixes-v3-8-e62e37a6bcf5@linutronix.de>
Date: Wed, 11 Jun 2025 12:33:58 +0200
From: Thomas Weißschuh <thomas.weissschuh@...utronix.de>
To: Andy Lutomirski <luto@...nel.org>, Thomas Gleixner <tglx@...utronix.de>, 
 Vincenzo Frascino <vincenzo.frascino@....com>, 
 Shuah Khan <shuah@...nel.org>, "Jason A. Donenfeld" <Jason@...c4.com>
Cc: Shuah Khan <skhan@...uxfoundation.org>, linux-kernel@...r.kernel.org, 
 linux-kselftest@...r.kernel.org, 
 Muhammad Usama Anjum <usama.anjum@...labora.com>, 
 Thomas Weißschuh <thomas.weissschuh@...utronix.de>
Subject: [PATCH v3 8/9] selftests: vDSO: vdso_test_getrandom: Always print
 TAP header

The TAP specification requires that the output begins with a header line.
If vgetrandom_init() fails and skips the test, that header line is missing.

Call vgetrandom_init() after ksft_print_header().

Signed-off-by: Thomas Weißschuh <thomas.weissschuh@...utronix.de>
Reviewed-by: Muhammad Usama Anjum <usama.anjum@...labora.com>
---
 tools/testing/selftests/vDSO/vdso_test_getrandom.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/tools/testing/selftests/vDSO/vdso_test_getrandom.c b/tools/testing/selftests/vDSO/vdso_test_getrandom.c
index 389ead4e1fe3761f265f7b589b417b6d9f25c565..dd1132508a0db29a32ec977b30f64b20aa43e03d 100644
--- a/tools/testing/selftests/vDSO/vdso_test_getrandom.c
+++ b/tools/testing/selftests/vDSO/vdso_test_getrandom.c
@@ -242,6 +242,7 @@ static void kselftest(void)
 	pid_t child;

 	ksft_print_header();
+	vgetrandom_init();
 	ksft_set_plan(2);

 	for (size_t i = 0; i < 1000; ++i) {
@@ -295,8 +296,6 @@ static void usage(const char *argv0)

 int main(int argc, char *argv[])
 {
-	vgetrandom_init();
-
 	if (argc == 1) {
 		kselftest();
 		return 0;
@@ -306,6 +305,9 @@ int main(int argc, char *argv[])
 		usage(argv[0]);
 		return 1;
 	}
+
+	vgetrandom_init();
+
 	if (!strcmp(argv[1], "bench-single"))
 		bench_single();
 	else if (!strcmp(argv[1], "bench-multi"))

-- 
2.49.0