Re: [patch 4/4] sched: Distangle worker accounting from rq->lock

[Thomas Gleixner <tglx@linutronix.de>]

On Wed, 22 Jun 2011, Thomas Gleixner wrote:
> +void wq_worker_sleeping(struct task_struct *task)
>  {
> -	struct worker *worker = kthread_data(task), *to_wakeup = NULL;
> -	struct global_cwq *gcwq = get_gcwq(cpu);
> -	atomic_t *nr_running = get_gcwq_nr_running(cpu);
> +	struct worker *worker = kthread_data(task);
> +	struct global_cwq *gcwq;
> +	int cpu;
>  
>  	if (worker->flags & WORKER_NOT_RUNNING)
> -		return NULL;
> +		return;
>  
> -	/* this can only happen on the local cpu */
> -	BUG_ON(cpu != raw_smp_processor_id());
> +	if (WARN_ON_ONCE(worker->sleeping))
> +		return;

Darn, forgot to add 

      worker->sleeping = 1;

back when I added the WARN_ON.