Built and inserted on Ubuntu 10.04

Author: Frank Maker

Makefile

@@ -0,0 +1,19 @@
+# If KERNELRELEASE is defined, we've been invoked from the
+# kernel build system and can use its language
+ifneq ($(KERNELRELEASE),)
+	obj-m := hello.o
+
+# Otherwise we were called directly from the command
+# line; invoke the kernel build system
+else
+	KERNELDIR ?= /lib/modules/$(shell uname -r)/build
+	PWD := $(shell pwd)
+	
+all:
+	$(MAKE) -C $(KERNELDIR) M=$(PWD) modules
+	
+endif
+
+.PHONY: clean.
+clean:
+	rm -rf *.o *.~ *.ko *.mod.c *.order *.symvers

hello.c

@@ -0,0 +1,18 @@
+#include <linux/init.h>
+#include <linux/module.h>
+MODULE_LICENSE("BSD");
+
+static int hello_init(void)
+{
+	printk(KERN_ALERT "Hello world!\n");
+	return 0;
+}
+
+static void hello_exit(void)
+{
+	printk(KERN_ALERT "Goodbye, cruel world!\n");
+}
+
+module_init(hello_init);
+module_exit(hello_exit);
+