add_timer crashes the kernel,Why?

[Wick]

Hi Lijin:


On Mon, Dec 20, 2010 at 4:27 PM, lijin liu <llj098 at gmail.com> wrote:
> Hello everyone!
>
> I want to use the timer in my kernel module. I read the book  _Linux
> kernel development 3rd version_  and LDD 3rd version.
>
> Both the two books tell me write the code like this:
>
> struct timer_list my_timer;
> init_timer(&my_timer);
>
> my_timer.expires = jiffies + wait;
> my_timer.data = 0;
> my_timer.function=my_function;

You just constructed my_timer.

>
> //active the timer:
> add_timer(&timer);

and add timer (not my_timer )to the timer list ...

If the problem still exists, suggest you copy all codes and crash log here.

>
>
> When I insmod the module, the kernel crashed, and when I change my
> code to *mod_timer* rather than add_timer.