On Sun, Jul 29, 2007 at 07:45:35PM -0700, Daniel Walker wrote:
> Simple WARN_ON to catch any underflow in rcu_read_lock_nesting.
>
> Signed-off-by: Daniel Walker <[email protected]>
Acked-by: Paul E. McKenney <[email protected]>
> ---
> kernel/rcupreempt.c | 6 ++++++
> 1 file changed, 6 insertions(+)
>
> Index: linux-2.6.22/kernel/rcupreempt.c
> ===================================================================
> --- linux-2.6.22.orig/kernel/rcupreempt.c
> +++ linux-2.6.22/kernel/rcupreempt.c
> @@ -157,6 +157,12 @@ void __rcu_read_unlock(void)
> }
>
> local_irq_restore(oldirq);
> +
> + /*
> + * If our rcu_read_lock_nesting went negative, likely
> + * something is wrong..
> + */
> + WARN_ON(current->rcu_read_lock_nesting < 0);
> }
>
> static void __rcu_advance_callbacks(void)
>
> --
> -
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