[PATCH] file: kill unnecessary timer in fdtable_defer

struct fdtable_defer {

	spinlock_t lock;

	struct work_struct wq;

	struct timer_list timer;

	struct fdtable *next;

};

	kfree(fdt);

}

static void fdtable_timer(unsigned long data)

{

	struct fdtable_defer *fddef = (struct fdtable_defer *)data;

	spin_lock(&fddef->lock);

	/*

	 * If someone already emptied the queue return.

	 */

	if (!fddef->next)

		goto out;

	if (!schedule_work(&fddef->wq))

		mod_timer(&fddef->timer, 5);

out:

	spin_unlock(&fddef->lock);

}

static void free_fdtable_work(struct work_struct *work)

{

	struct fdtable_defer *f =

		spin_lock(&fddef->lock);

		fdt->next = fddef->next;

		fddef->next = fdt;

		/*

		 * vmallocs are handled from the workqueue context.

		 * If the per-cpu workqueue is running, then we

		 * defer work scheduling through a timer.

		 */

		if (!schedule_work(&fddef->wq))

			mod_timer(&fddef->timer, 5);

		/* vmallocs are handled from the workqueue context */

		schedule_work(&fddef->wq);

		spin_unlock(&fddef->lock);

		put_cpu_var(fdtable_defer_list);

	}

	struct fdtable_defer *fddef = &per_cpu(fdtable_defer_list, cpu);

	spin_lock_init(&fddef->lock);

	INIT_WORK(&fddef->wq, free_fdtable_work);

	init_timer(&fddef->timer);

	fddef->timer.data = (unsigned long)fddef;

	fddef->timer.function = fdtable_timer;

	fddef->next = NULL;

}