On Fri, Mar 1, 2013 at 9:36 AM, Yong Zhang <yong.zhang0@xxxxxxxxx> wrote:
> --- a/kernel/futex.c
> +++ b/kernel/futex.c
> @@ -562,16 +562,17 @@ void exit_pi_state_list(struct task_struct *curr)
>
> spin_lock(&hb->lock);
>
> - raw_spin_lock_irq(&curr->pi_lock);
> /*
> * We dropped the pi-lock, so re-check whether this
> * task still owns the PI-state:
> */
> if (head->next != next) {
Just ignore this patch, race window is opened here.
New patch comes soon.
Thanks,
Yong
> spin_unlock(&hb->lock);
> + raw_spin_lock_irq(&curr->pi_lock);
> continue;
> }
>
> + raw_spin_lock_irq(&curr->pi_lock);
> WARN_ON(pi_state->owner != curr);
> WARN_ON(list_empty(&pi_state->list));
> list_del_init(&pi_state->list);
> --
> 1.7.9.5
>
--
Only stand for myself
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