mm: purge fragmented percpu vmap blocks
[linux-3.10.git] / mm / page_isolation.c
index b70a7fe..5e0ffd9 100644 (file)
@@ -130,10 +130,11 @@ int test_pages_isolated(unsigned long start_pfn, unsigned long end_pfn)
                if (page && get_pageblock_migratetype(page) != MIGRATE_ISOLATE)
                        break;
        }
-       if (pfn < end_pfn)
+       page = __first_valid_page(start_pfn, end_pfn - start_pfn);
+       if ((pfn < end_pfn) || !page)
                return -EBUSY;
        /* Check all pages are free or Marked as ISOLATED */
-       zone = page_zone(pfn_to_page(pfn));
+       zone = page_zone(page);
        spin_lock_irqsave(&zone->lock, flags);
        ret = __test_page_isolated_in_pageblock(start_pfn, end_pfn);
        spin_unlock_irqrestore(&zone->lock, flags);