[PATCH v4 linux-kselftest-test 5/6] kunit: allow kunit to be loaded as a module

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Making kunit itself buildable as a module allows for "always-on"
kunit configuration; specifying CONFIG_KUNIT=m means the module
is built but only used when loaded.  Kunit test modules will load
kunit.ko as an implicit dependency, so simply running
"modprobe my-kunit-tests" will load the tests along with the kunit
module and run them.

Signed-off-by: Alan Maguire <alan.maguire@xxxxxxxxxx>
Signed-off-by: Knut Omang <knut.omang@xxxxxxxxxx>
---
 lib/kunit/Kconfig  |  2 +-
 lib/kunit/Makefile |  4 +++-
 lib/kunit/test.c   | 13 +++++++++++++
 3 files changed, 17 insertions(+), 2 deletions(-)

diff --git a/lib/kunit/Kconfig b/lib/kunit/Kconfig
index 9ebd5e6..065aa16 100644
--- a/lib/kunit/Kconfig
+++ b/lib/kunit/Kconfig
@@ -3,7 +3,7 @@
 #
 
 menuconfig KUNIT
-	bool "KUnit - Enable support for unit tests"
+	tristate "KUnit - Enable support for unit tests"
 	help
 	  Enables support for kernel unit tests (KUnit), a lightweight unit
 	  testing and mocking framework for the Linux kernel. These tests are
diff --git a/lib/kunit/Makefile b/lib/kunit/Makefile
index bc6e5e54..fab5564 100644
--- a/lib/kunit/Makefile
+++ b/lib/kunit/Makefile
@@ -1,4 +1,6 @@
-obj-$(CONFIG_KUNIT) +=			test.o \
+obj-$(CONFIG_KUNIT) +=			kunit.o
+
+kunit-objs +=				test.o \
 					string-stream.o \
 					assert.o \
 					try-catch.o
diff --git a/lib/kunit/test.c b/lib/kunit/test.c
index 87b5cf1..41ef71a 100644
--- a/lib/kunit/test.c
+++ b/lib/kunit/test.c
@@ -486,3 +486,16 @@ void kunit_cleanup(struct kunit *test)
 	}
 }
 EXPORT_SYMBOL_GPL(kunit_cleanup);
+
+static int kunit_init(void)
+{
+	return 0;
+}
+late_initcall(kunit_init);
+
+static void __exit kunit_exit(void)
+{
+}
+module_exit(kunit_exit);
+
+MODULE_LICENSE("GPL");
-- 
1.8.3.1




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