[CRIU] [PATCH] ptrace: add ability to retrieve signals without removing from a queue (v2)

[Pavel Emelyanov]

> +	for (i = 0; i < arg.nr; i++) {
> +		off = arg.off + i;
> +
> +		spin_lock_irq(&child->sighand->siglock);
> +		list_for_each_entry(q, &pending->list, list) {
> +			if (!off--) {
> +				copy_siginfo(&info, &q->info);
> +				break;
> +			}
> +		}
> +		spin_unlock_irq(&child->sighand->siglock);

What's the point of arg.nr if you for every single siginfo drop the lock
and perform linear search anyway?

Thanks,
Pavel