In article <[EMAIL PROTECTED]> (at Thu, 18 Oct 2007 15:53:52 +0400), Pavel 
Emelyanov <[EMAIL PROTECTED]> says:

> This routine scans the ipv6_fl_list whose update is
> protected with the socket lock and the ip6_sk_fl_lock.

>               struct ip6_flowlabel *fl = sfl->fl;
>               if (fl->label == label) {
> +                     read_unlock_bh(&ip6_sk_fl_lock);
>                       fl->lastuse = jiffies;
>                       atomic_inc(&fl->users);
>                       return fl;

We should increment fl->users within the critical section, shouldn't we?

--yoshfuji
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