linux-kernel - [PATCH 3/5] kunit: string-stream-test: Make it a separate module

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Date: Tue,  4 Jun 2024 13:32:02 +0100
From: Ivan Orlov <ivan.orlov0322@...il.com>
To: brendan.higgins@...ux.dev,
	davidgow@...gle.com,
	rmoar@...gle.com
Cc: Ivan Orlov <ivan.orlov0322@...il.com>,
	linux-kselftest@...r.kernel.org,
	kunit-dev@...glegroups.com,
	linux-kernel@...r.kernel.org
Subject: [PATCH 3/5] kunit: string-stream-test: Make it a separate module

Currently, the only way to build string-stream-test is by setting
CONFIG_KUNIT_TEST=y. However, CONFIG_KUNIT_TEST is a config option for
a different test (`kunit-test.c`).

Introduce a new Kconfig entry in order to be able to build the
string-stream-test test as a separate module. Import the KUnit namespace
in the test so we could have string-stream functions accessible.

Signed-off-by: Ivan Orlov <ivan.orlov0322@...il.com>
---
 lib/kunit/Kconfig              | 8 ++++++++
 lib/kunit/Makefile             | 2 +-
 lib/kunit/string-stream-test.c | 2 ++
 3 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/lib/kunit/Kconfig b/lib/kunit/Kconfig
index 34d7242d526d..b0713c0f9265 100644
--- a/lib/kunit/Kconfig
+++ b/lib/kunit/Kconfig
@@ -45,6 +45,14 @@ config KUNIT_TEST
 	  purposes by developers interested in testing that KUnit works as
 	  expected.
 
+config KUNIT_STRING_STREAM_TEST
+	tristate "KUnit test for string-stream" if !KUNIT_ALL_TESTS
+	default KUNIT_ALL_TESTS
+	help
+	  Enables the KUnit test for the string-stream (C++ stream style string
+	  builder used in KUnit for building messages). For the string-stream
+	  implementation, see lib/kunit/string-stream.c.
+
 config KUNIT_EXAMPLE_TEST
 	tristate "Example test for KUnit" if !KUNIT_ALL_TESTS
 	default KUNIT_ALL_TESTS
diff --git a/lib/kunit/Makefile b/lib/kunit/Makefile
index 900e6447c8e8..4793a3960f07 100644
--- a/lib/kunit/Makefile
+++ b/lib/kunit/Makefile
@@ -18,10 +18,10 @@ endif
 obj-y +=				hooks.o
 
 obj-$(CONFIG_KUNIT_TEST) +=		kunit-test.o
+obj-$(CONFIG_KUNIT_STRING_STREAM_TEST) += string-stream-test.o
 
 # string-stream-test compiles built-in only.
 ifeq ($(CONFIG_KUNIT_TEST),y)
-obj-$(CONFIG_KUNIT_TEST) +=		string-stream-test.o
 obj-$(CONFIG_KUNIT_TEST) +=		assert_test.o
 endif
 
diff --git a/lib/kunit/string-stream-test.c b/lib/kunit/string-stream-test.c
index 7511442ea98f..d03cac934e04 100644
--- a/lib/kunit/string-stream-test.c
+++ b/lib/kunit/string-stream-test.c
@@ -534,3 +534,5 @@ static struct kunit_suite string_stream_test_suite = {
 	.init = string_stream_test_init,
 };
 kunit_test_suites(&string_stream_test_suite);
+MODULE_IMPORT_NS(EXPORTED_FOR_KUNIT_TESTING);
+MODULE_LICENSE("GPL");
-- 
2.34.1