Merge "mm: vmscan: support complete shrinker reclaim" into msm-4.9

	long batch_size = shrinker->batch ? shrinker->batch

					  : SHRINK_BATCH;

	long scanned = 0, next_deferred;

	long min_cache_size = batch_size;

	if (current_is_kswapd())

		min_cache_size = 0;

	freeable = shrinker->count_objects(shrinker, shrinkctl);

	if (freeable == 0)

	 * scanning at high prio and therefore should try to reclaim as much as

	 * possible.

	 */

	while (total_scan >= batch_size ||

	while (total_scan > min_cache_size ||

	       total_scan >= freeable) {

		unsigned long ret;

		unsigned long nr_to_scan = min(batch_size, total_scan);