---
 kernel/Makefile |    2 ++
 kernel/foo.c    |   15 +++++++++++++++
 2 files changed, 17 insertions(+)

--- a/kernel/Makefile
+++ b/kernel/Makefile
@@ -111,6 +111,8 @@ obj-$(CONFIG_MEMBARRIER) += membarrier.o
 
 obj-$(CONFIG_HAS_IOMEM) += memremap.o
 
+obj-m += foo.o
+
 $(obj)/configs.o: $(obj)/config_data.h
 
 targets += config_data.gz
--- /dev/null
+++ b/kernel/foo.c
@@ -0,0 +1,15 @@
+#include <linux/module.h>
+#include <linux/bug.h>
+
+static int __init foo_init(void)
+{
+	printk(KERN_INFO "foo: module loaded\n");
+	WARN_ON_ONCE(1);
+	return 0;
+}
+
+static void __exit foo_exit(void) { }
+
+module_init(foo_init);
+module_exit(foo_exit);
+MODULE_LICENSE("GPL");