book.c

Linux驱动编程源码

/*======================================================================
    A kernel module: book
    This example is to introduce module params
         
    The initial developer of the original code is Baohua Song
    <[e-mail]>. All Rights Reserved.
======================================================================*/
#include <linux/init.h>                                
#include <linux/module.h>                                
MODULE_LICENSE("Dual BSD/GPL");                                
                                
static char *book_name = "dissecting Linux Device Driver";              
static int num = 4000;                                
                                
static int book_init(void)                                
{                                
	printk(KERN_INFO " book name:%s\n",book_name);                        
	printk(KERN_INFO " book num:%d\n",num);                               
	return 0;                                
}                                
static void book_exit(void)                                
{                                
	printk(KERN_INFO " Book module exit\n ");                            
}                                
module_init(book_init);                                
module_exit(book_exit);                                
module_param(num, int, S_IRUGO);                                
module_param(book_name, charp, S_IRUGO);
                                
MODULE_AUTHOR("Song Baohua, [e-mail]");
MODULE_DESCRIPTION("A simple Module for testing module params");
MODULE_VERSION("V1.0");