[PATCH 2/2] selftests/sched_ext: Return non-zero exit code on test failure

[zhidao su <soolaugust@gmail.com>]

runner.c always returned 0 regardless of test results.  The kselftest
framework (tools/testing/selftests/kselftest/runner.sh) invokes the runner
binary and treats a non-zero exit code as a test failure; with the old
code, failed sched_ext tests were silently hidden from the parent harness
even though individual "not ok" TAP lines were emitted.

Return 1 when at least one test failed, 0 when all tests passed or were
skipped.

Signed-off-by: zhidao su <suzhidao@xiaomi.com>
---
 tools/testing/selftests/sched_ext/runner.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/testing/selftests/sched_ext/runner.c b/tools/testing/selftests/sched_ext/runner.c
index 37ad56c3eb29..4c68efa1512a 100644
--- a/tools/testing/selftests/sched_ext/runner.c
+++ b/tools/testing/selftests/sched_ext/runner.c
@@ -217,7 +217,7 @@ int main(int argc, char **argv)
 			printf("  - %s\n", failed_tests[i]);
 	}
 
-	return 0;
+	return failed > 0 ? 1 : 0;
 }
 
 void scx_test_register(struct scx_test *test)
-- 
2.43.0