int isolate_lru_page(struct page *page) { int ret = -EBUSY; VM_BUG_ON_PAGE(!page_count(page), page); WARN_RATELIMIT(PageTail(page), "trying to isolate tail page"); if (PageLRU(page)) { struct zone *zone = page_zone(page); struct lruvec *lruvec; spin_lock_irq(&zone->lru_...