Update Linux to v5.4.2
Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/tools/testing/selftests/kselftest_module.h b/tools/testing/selftests/kselftest_module.h
new file mode 100644
index 0000000..e8eafaf
--- /dev/null
+++ b/tools/testing/selftests/kselftest_module.h
@@ -0,0 +1,48 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+#ifndef __KSELFTEST_MODULE_H
+#define __KSELFTEST_MODULE_H
+
+#include <linux/module.h>
+
+/*
+ * Test framework for writing test modules to be loaded by kselftest.
+ * See Documentation/dev-tools/kselftest.rst for an example test module.
+ */
+
+#define KSTM_MODULE_GLOBALS() \
+static unsigned int total_tests __initdata; \
+static unsigned int failed_tests __initdata
+
+#define KSTM_CHECK_ZERO(x) do { \
+ total_tests++; \
+ if (x) { \
+ pr_warn("TC failed at %s:%d\n", __func__, __LINE__); \
+ failed_tests++; \
+ } \
+} while (0)
+
+static inline int kstm_report(unsigned int total_tests, unsigned int failed_tests)
+{
+ if (failed_tests == 0)
+ pr_info("all %u tests passed\n", total_tests);
+ else
+ pr_warn("failed %u out of %u tests\n", failed_tests, total_tests);
+
+ return failed_tests ? -EINVAL : 0;
+}
+
+#define KSTM_MODULE_LOADERS(__module) \
+static int __init __module##_init(void) \
+{ \
+ pr_info("loaded.\n"); \
+ selftest(); \
+ return kstm_report(total_tests, failed_tests); \
+} \
+static void __exit __module##_exit(void) \
+{ \
+ pr_info("unloaded.\n"); \
+} \
+module_init(__module##_init); \
+module_exit(__module##_exit)
+
+#endif /* __KSELFTEST_MODULE_H */