Ingo Molnar <[email protected]> wrote:
>
> @@ -1433,7 +1485,16 @@ send_group_sigqueue(int sig, struct sigq
> int ret = 0;
>
> BUG_ON(!(q->flags & SIGQUEUE_PREALLOC));
> - read_lock(&tasklist_lock);
> +
> + while(!read_trylock(&tasklist_lock)) {
> + if (!p->sighand)
> + return -1;
> + cpu_relax();
> + }
This looks kind of ugly and quite unobvious.
What's going on there?
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