- struct pagevec *pvec = &per_cpu(lru_add_pvecs, cpu);
-
- /* CPU is dead, so no locking needed. */
- if (pagevec_count(pvec))
- __pagevec_lru_add(pvec);
- pvec = &per_cpu(lru_add_active_pvecs, cpu);
- if (pagevec_count(pvec))
- __pagevec_lru_add_active(pvec);
+ struct zone *zone = page_zone(page);
+
+ spin_lock_irq(&zone->lru_lock);
+ SetPageUnevictable(page);
+ SetPageLRU(page);
+ add_page_to_lru_list(zone, page, LRU_UNEVICTABLE);
+ spin_unlock_irq(&zone->lru_lock);
+}
+
+/*
+ * Drain pages out of the cpu's pagevecs.
+ * Either "cpu" is the current CPU, and preemption has already been
+ * disabled; or "cpu" is being hot-unplugged, and is already dead.
+ */
+static void drain_cpu_pagevecs(int cpu)
+{
+ struct pagevec *pvecs = per_cpu(lru_add_pvecs, cpu);
+ struct pagevec *pvec;
+ int lru;
+
+ for_each_lru(lru) {
+ pvec = &pvecs[lru - LRU_BASE];
+ if (pagevec_count(pvec))
+ ____pagevec_lru_add(pvec, lru);
+ }
+
+ pvec = &per_cpu(lru_rotate_pvecs, cpu);
+ if (pagevec_count(pvec)) {
+ unsigned long flags;
+
+ /* No harm done if a racing interrupt already did this */
+ local_irq_save(flags);
+ pagevec_move_tail(pvec);
+ local_irq_restore(flags);
+ }