From 90c5318795eefa09a9f9aef8d18a904e24962b5c Mon Sep 17 00:00:00 2001
From: Ilya Leoshkevich <iii@linux.ibm.com>
Date: Wed, 19 Jan 2022 19:26:38 +0100
Subject: s390/module: test loading modules with a lot of relocations

Add a test in order to prevent regressions.

Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Reviewed-by: Heiko Carstens <hca@linux.ibm.com>
Cc: Vasily Gorbik <gor@linux.ibm.com>
Cc: Christian Borntraeger <borntraeger@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
---
 arch/s390/lib/test_modules.c | 35 +++++++++++++++++++++++++++++++++++
 1 file changed, 35 insertions(+)
 create mode 100644 arch/s390/lib/test_modules.c

(limited to 'arch/s390/lib/test_modules.c')

diff --git a/arch/s390/lib/test_modules.c b/arch/s390/lib/test_modules.c
new file mode 100644
index 0000000000000..d056baa8fbb0c
--- /dev/null
+++ b/arch/s390/lib/test_modules.c
@@ -0,0 +1,35 @@
+// SPDX-License-Identifier: GPL-2.0+
+
+#include <kunit/test.h>
+#include <linux/module.h>
+
+#include "test_modules.h"
+
+#define DECLARE_RETURN(i) int test_modules_return_ ## i(void)
+REPEAT_10000(DECLARE_RETURN);
+
+/*
+ * Test that modules with many relocations are loaded properly.
+ */
+static void test_modules_many_vmlinux_relocs(struct kunit *test)
+{
+	int result = 0;
+
+#define CALL_RETURN(i) result += test_modules_return_ ## i()
+	REPEAT_10000(CALL_RETURN);
+	KUNIT_ASSERT_EQ(test, result, 49995000);
+}
+
+static struct kunit_case modules_testcases[] = {
+	KUNIT_CASE(test_modules_many_vmlinux_relocs),
+	{}
+};
+
+static struct kunit_suite modules_test_suite = {
+	.name = "modules_test_s390",
+	.test_cases = modules_testcases,
+};
+
+kunit_test_suites(&modules_test_suite);
+
+MODULE_LICENSE("GPL");
-- 
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