[PATCH]kprobe booster for IA64

[Keshavamurthy Anil S]

On Tue, Jun 06, 2006 at 03:35:40PM +0900, Masami Hiramatsu wrote:

> +#ifdef CONFIG_PREEMPT
> +	unsigned pre_preempt_count = preempt_count();
> +#else
> +	unsigned pre_preempt_count = 1;
> +#endif
> 
>  	/*
>  	 * We don't want to be preempted for the entire
> @@ -681,6 +745,14 @@ static int __kprobes pre_kprobes_handler
>  		 */
>  		return 1;
> 
> +	if (pre_preempt_count && p->ainsn.inst_flag == INST_FLAG_BOOSTABLE &&
> +	    !p->post_handler) {

pre_preempt_count will always be one here, since 
notify_die()->atomic_notifier_call_chain()->read_rcu_lock()->preeempt_disable(). 
So currently you might be preparing for boosting even for 
preemptable code path. Can you verify this.

-Anil