Re: [(RT RFC) PATCH v2 3/9] rearrange rt_spin_lock sleep

[Pavel Machek]

Hi!

> @@ -720,7 +728,8 @@ rt_spin_lock_slowlock(struct rt_mutex *lock)
>        * saved_state accordingly. If we did not get a real wakeup
>        * then we return with the saved state.
>        */
> -     saved_state = xchg(&current->state, TASK_UNINTERRUPTIBLE);
> +     saved_state = current->state;
> +     smp_mb();
>  
>       for (;;) {
>               unsigned long saved_flags;

Please document what the barrier is good for.

Plus, you are replacing atomic operation with nonatomic; is that ok?

                                                                        Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) 
http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [EMAIL PROTECTED]
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/