1 /*
2 * $Id: hellop.c,v 1.4 2004/09/26 07:02:43 gregkh Exp $
3 */
4 #include <linux/init.h>
5 #include <linux/module.h>
6 #include <linux/moduleparam.h>
7
8 MODULE_LICENSE("Dual BSD/GPL");
9
10 /*
11 * These lines, although not shown in the book,
12 * are needed to make hello.c run properly even when
13 * your kernel has version support enabled
14 */
15
16
17 /*
18 * A couple of parameters that can be passed in: how many times we say
19 * hello, and to whom.
20 */
21 static char *whom = "world";
22 static int howmany = 1;
23 module_param(howmany, int, S_IRUGO);
24 module_param(whom, charp, S_IRUGO);
25
26 static int hello_init(void)
27 {
28 int i;
29 for (i = 0; i < howmany; i++)
30 printk(KERN_ALERT "(%d) Hello, %s\n", i, whom);
31 return 0;
32 }
33
34 static void hello_exit(void)
35 {
36 printk(KERN_ALERT "Goodbye, cruel world\n");
37 }
38
39 module_init(hello_init);
40 module_exit(hello_exit);
41
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