How to walk through the tasklist ?

How to walk through the tasklist ?

[Stephan von Krawczynski]

Hello all,

can anyone give me a short hint how walking through the tasklist in a device
driver can be achieved nowadays. In ancient pre-20 times you could simply:

    read_lock(&tasklist_lock);
    p=current; 
    do {
        if (p->pid==pid) {  
            read_unlock(&tasklist_lock);
            /* found */
        }
        p=p->next_task;
    } while (p!=current);
    read_unlock(&tasklist_lock);

But since tasklist_lock is gone this is not safe any longer. So, what can I do?


-- 
Regards,
Stephan

Re: How to walk through the tasklist ?

[Jan Engelhardt]

On Apr 24 2007 14:58, Stephan von Krawczynski wrote:
>Hello all,
>
>can anyone give me a short hint how walking through the tasklist in a device
>driver can be achieved nowadays. In ancient pre-20 times you could simply:
>
>    read_lock(&tasklist_lock);
>    p=current; 
>    do {
>        if (p->pid==pid) {  
>            read_unlock(&tasklist_lock);
>            /* found */
>        }
>        p=p->next_task;
>    } while (p!=current);
>    read_unlock(&tasklist_lock);
>
>But since tasklist_lock is gone this is not safe any longer. So, what can I do?


How about for_each_process?


Jan
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