static bool tx_credit_exceeded(struct xenvif *vif, unsigned size)
{
	unsigned long now = jiffies;
	unsigned long next_credit =
		vif->credit_timeout.expires +
		msecs_to_jiffies(vif->credit_usec / 1000);

	/* Timer could already be pending in rare cases. */
	if (timer_pending(&vif->credit_timeout))
		return true;

	/* Passed the point where we can replenish credit? */
	if (time_after_eq(now, next_credit)) {
		vif->credit_timeout.expires = now;
		tx_add_credit(vif);
	}

	/* Still too big to send right now? Set a callback. */
	if (size > vif->remaining_credit) {
		vif->credit_timeout.data     =
			(unsigned long)vif;
		vif->credit_timeout.function =
			tx_credit_callback;
		mod_timer(&vif->credit_timeout,
			  next_credit);

		return true;
	}

	return false;
}
static bool tx_credit_exceeded(struct xenvif *vif, unsigned size)
{
	unsigned long now = jiffies;
	unsigned long next_credit =
		vif->credit_timeout.expires +
		msecs_to_jiffies(vif->credit_usec / 1000);

	 
	if (timer_pending(&vif->credit_timeout))
		return true;

	 
	if (time_after_eq(now, next_credit)) {
		vif->credit_timeout.expires = now;
		tx_add_credit(vif);
	}

	 
	if (size > vif->remaining_credit) {
		vif->credit_timeout.data     =
			(unsigned long)vif;
		vif->credit_timeout.function =
			tx_credit_callback;
		mod_timer(&vif->credit_timeout,
			  next_credit);

		return true;
	}

	return false;
}