Re: ldd module param practice

["Américo Wang" <xiyou.wangcong@gmail.com>]

On Mon, Aug 23, 2010 at 07:00:18AM +0800, runcoderen wrote:
>hi all:
>
>#include <linux/init.h>
>#include <linux/module.h>
>#include <linux/moduleparam.h>
>
>MODULE_LICENSE("Dual BSD/GPL");
>
>static char *whom = "world";
>static char howmany = 1;
>
>module_param(howmany, int, S_IRUGO);
>module_param(whom, charp, S_IRUGO);
>
>static int hello_init(void)
>{
>printk(KERN_ALERT "Hello, world\n");
>return 0;
>}
>
>static void hello_exit(void)
>{
>printk(KERN_ALERT "Goodbye, cruel world\n");
>}
>
>module_init(hello_init);
>module_exit(hello_exit);
>
>insmod hellop.ko howmany=10 whom="Mom"
>
>this code I want to printk "hello Mom" 10 times.


How can it work? You neither have a loop nor use 'whom'
in your hello_init()...

You need:

statick int hello_init(void)
{
   int i;
   for (i=0; i<howmany; i++)
      printk(KERN_WARNING "Hello, %s\n", whom);
   return 0;
}