linux-kernel - Re: How to walk through the tasklist ?

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Message-ID: <Pine.LNX.4.61.0704241521330.2490@yvahk01.tjqt.qr>
Date:	Tue, 24 Apr 2007 15:21:44 +0200 (MEST)
From:	Jan Engelhardt <jengelh@...ux01.gwdg.de>
To:	Stephan von Krawczynski <skraw@...net.com>
cc:	linux-kernel@...r.kernel.org
Subject: Re: How to walk through the tasklist ?


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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