static void vmpressure_work_fn(struct work_struct *work)
{
 ...
	if (!vmpr->scanned)
		return;

	spin_lock(&vmpr->sr_lock);
	scanned = vmpr->scanned;

In some android devices, there will be a "divided by zero" expection. the vmpr->scanned could be zero before “spin_lock(&vmpr->sr_lock)”

So the above source code should be changed to:

	spin_lock(&vmpr->sr_lock);
	scanned = vmpr->scanned;
	if (!scanned)
	{
		spin_unlock(&vmpr->sr_lock);
		return;
	}