内核链接的简单使用

内核链表的使用demo
 1 /*1. 头文件 */
 2 #include <linux/init.h>
 3 #include <linux/module.h>
 4 #include <linux/moduleparam.h>
 5 #include <linux/kernel.h>
 6 #include <linux/list.h>
 7 
 8 struct score{
 9     int num;
10     int Englist;
11     int math;
12     struct list_head list;
13 };
14 
15 struct list_head score_head;
16 
17 struct score stu1,stu2,stu3;
18 struct list_head *pos;
19 struct score *tmp;
20 
21 
22 MODULE_PARM_DESC(ivar, "module kernel list");
23 
24 
25 
26 
27 
28 /* 2.模块的加载函数*/
29 static int __init hello_init(void)
30 {
31     int ret = 0;
32 
33     INIT_LIST_HEAD(&score_head);
34 
35     stu1.num = 1;
36     stu1.Englist =59;
37     stu1.math = 99;
38 
39     list_add_tail(&(stu1.list),&score_head);
40 
41     stu2.num = 2;
42     stu2.Englist = 69;
43     stu3.math = 98;
44 
45     list_add_tail(&(stu2.list),&score_head);
46 
47     stu3.num = 3;
48     stu3.Englist = 89;
49     stu3.math = 97;
50 
51     list_add_tail(&(stu3.list),&score_head);
52 
53     list_for_each(pos,&score_head){
54         tmp = list_entry(pos,struct score,list);
55         printk(KERN_ERR"num:%d	Englist: %d	math: %d
",tmp->num,tmp->Englist,tmp->math);
56     }
57 
58 
59     return ret;
60 }
61 
62 /* 3.模块的卸载函数*/
63 static void __exit hello_exit(void)
64 {
65     list_del(&(stu3.list));
66     list_del(&(stu2.list));
67     list_del(&(stu1.list));
68 
69   printk("%s()[%s:%d]
",  __func__, __FILE__, __LINE__);
70   printk("Bye, drivers!
");    
71 }
72 
73 /*4. 模块的入口和出口*/
74 module_init(hello_init);
75 module_exit(hello_exit);
76 
77 /*5.模块的许可声明*/
78 MODULE_LICENSE("GPL");