/*                                                      * $Id: hellop.c,v 1.4 2004/09/26 07:02:43 gregkh Exp $  */                                                    #include <linux/init.h>#include <linux/module.h>#include <linux/moduleparam.h>MODULE_LICENSE("Dual BSD/GPL");/*                                                         * These lines, although not shown in the book,            * are needed to make hello.c run properly even when       * your kernel has version support enabled                 */                                                                                                                 /* * A couple of parameters that can be passed in: how many times we say * hello, and to whom. */static char *whom = "world";static int howmany = 1;module_param(howmany, int, S_IRUGO);module_param(whom, charp, S_IRUGO);static int hello_init(void){	int i;	for (i = 0; i < howmany; i++)		printk(KERN_ALERT "(%d) Hello, %s\n", i, whom);	return 0;}static void hello_exit(void){	printk(KERN_ALERT "Goodbye, cruel world\n");}module_init(hello_init);module_exit(hello_exit);