kernel_thread question

kernel_thread question

[Viral Mehta]

All,

//My thread routine
int my_thread(void*)
{
    if(printk("blah"))
        return 5; //WHERE THE HELL THIS VALUE GOES !! ?? !! HOW CAN I 
SEE ITS RETURN VALUE ??? PLEASE SUGGEST
    else
       return 0;
//WHERE THE HELL THIS RETURN VALUE GOES !! ?? !! HOW CAN I SEE ITS 
RETURN VALUE ??? PLEASE SUGGEST
//RETURNED 5 or 0 ?? I am amused
}

//my init module
int mod_init()
{
    ...
    int i;
    i = kernel_thread ((void *)my_thread, NULL, 0); //RETURNS NEW PROCESS ID
    ...
}

There is one doubt. Whatever that kernel_thread has started and it 
completes and returns some value. How can I see that value?
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Re: kernel_thread question

[Stefan Richter]

Viral Mehta wrote:
> int my_thread(void*)
> {
>     if(printk("blah"))
>         return 5; //WHERE THE HELL THIS VALUE GOES !! ?? !! HOW CAN I 
> SEE ITS RETURN VALUE ???

The return value is passed over to kthread_stop().  If you don't use
kthread_stop(), the return value of threadfn does not matter.

http://lxr.linux.no/linux+v2.6.28/kernel/kthread.c#L187
-- 
Stefan Richter
-=====-==--= --== =--=-
http://arcgraph.de/sr/