How to walk through the tasklist ?

[Stephan von Krawczynski <skraw@ithnet.com>]

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