Hello World Kernel Module
============================

In C/C++ Programming we have the main() as the entry point and exit point.

Kernel modules must have at least two functions: 
	a "start" (initialization) function : which is called when the module is loaded into the kernel
	an "end" (cleanup) function called : which is called just before it is removed

This is done with the module_init() and module_exit() macros

Licensing
============

Module should specify which license you are using MODULE_LICENSE() macro

	"GPL"				[GNU Public License v2 or later]
	"GPL v2"			[GNU Public License v2]
	"GPL and additional rights"	[GNU Public License v2 rights and more]
	"Dual BSD/GPL"			[GNU Public License v2
					 or BSD license choice]
	"Dual MIT/GPL"			[GNU Public License v2
					 or MIT license choice]
	"Dual MPL/GPL"			[GNU Public License v2
					 or Mozilla license choice]

	"Proprietary"			[Non free products]


Header Files
============
	Every kernel module needs to include linux/module.h. for macro expansion of module_init and module_exit
	linux/kernel.h only for the macro expansion for the printk() log level