add hello kmod

kmod/Makefile

@@ -0,0 +1,22 @@
+# Makefile supports different kernel path
+# Jul 1, 2014
+# root@davejingtian.org
+# http://davejingtian.org
+
+ifneq ($(KERNELPATH),)
+	KDIR	:= $(KERNELPATH)
+else
+	# Default kernel path
+	KDIR	:= /lib/modules/$(shell uname -r)/build
+endif
+
+PWD	:= $(shell pwd)
+
+obj-m += hello.o
+
+all:
+	make -C $(KDIR)  M=$(PWD) modules
+clean:
+	make -C $(KDIR)  M=$(PWD) clean
+
+

kmod/hello.c

@@ -0,0 +1,26 @@
+/*
+ * hello.c
+ * Dec 30, 2018
+ * root@davejingtian.org
+ * http://davejingtian.org
+ */
+#include <linux/module.h>
+#include <linux/kernel.h>
+
+
+static int __init hello_init(void)
+{
+	pr_info("into %s\n", __func__);
+	return 0;
+}
+static void __exit hello_exit(void)
+{
+	pr_info("exit hello module\n");
+}
+
+module_init(hello_init);
+module_exit(hello_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("hello module");
+MODULE_AUTHOR("daveti");