zs_malloc
handle = zs_malloc(zram->mem_pool, PAGE_SIZE,
handle = zs_malloc(zram->mem_pool, comp_len,
handle_new = zs_malloc(zram->mem_pool, comp_len_new,
unsigned long zs_malloc(struct zs_pool *pool, size_t size, gfp_t flags,
EXPORT_SYMBOL_GPL(zs_malloc);
handle = zs_malloc(pool->zs_pool, dlen, gfp, page_to_nid(page));