- for (i = zs_size_classes - 1; i >= 0; i--) {
- int size;
- int pages_per_zspage;
- struct size_class *class;
-
- size = ZS_MIN_ALLOC_SIZE + i * ZS_SIZE_CLASS_DELTA;
- if (size > ZS_MAX_ALLOC_SIZE)
- size = ZS_MAX_ALLOC_SIZE;
- pages_per_zspage = get_pages_per_zspage(size);
-
- /*
- * size_class is used for normal zsmalloc operation such
- * as alloc/free for that size. Although it is natural that we
- * have one size_class for each size, there is a chance that we
- * can get more memory utilization if we use one size_class for
- * many different sizes whose size_class have same
- * characteristics. So, we makes size_class point to
- * previous size_class if possible.
- */
- if (prev_class) {
- if (can_merge(prev_class, size, pages_per_zspage)) {
- pool->size_class[i] = prev_class;
- continue;
- }
- }
-
- class = kzalloc(sizeof(struct size_class), GFP_KERNEL);
- if (!class)
- goto err;