tracing: Check all tasks on each CPU when filtering pids

	return (PAGE_SIZE << pid_list->order) / sizeof(pid_t);

}

static void ignore_task_cpu(void *data)

{

	struct trace_array *tr = data;

	struct trace_pid_list *pid_list;

	/*

	 * This function is called by on_each_cpu() while the

	 * event_mutex is held.

	 */

	pid_list = rcu_dereference_protected(tr->filtered_pids,

					     mutex_is_locked(&event_mutex));

	this_cpu_write(tr->trace_buffer.data->ignore_pid,

		       check_ignore_pid(pid_list, current));

}

static ssize_t

ftrace_event_pid_write(struct file *filp, const char __user *ubuf,

		       size_t cnt, loff_t *ppos)

						 tr, INT_MAX);

		register_trace_prio_sched_wakeup(event_filter_pid_sched_wakeup_probe_post,

						 tr, 0);

		/*

		 * Ignoring of pids is done at task switch. But we have to

		 * check for those tasks that are currently running.

		 */

		on_each_cpu(ignore_task_cpu, tr, 1);

	}

	mutex_unlock(&event_mutex);