hugetlbfs: handle pages higher order than MAX_ORDER

[pandora-kernel.git] / mm / page_isolation.c

diff --git a/mm/page_isolation.c b/mm/page_isolation.c
index 3444b58..b70a7fe 100644 (file)
--- a/mm/page_isolation.c
+++ b/mm/page_isolation.c
@@ -2,7 +2,6 @@
  * linux/mm/page_isolation.c
  */
 
-#include <stddef.h>
 #include <linux/mm.h>
 #include <linux/page-isolation.h>
 #include <linux/pageblock-flags.h>
@@ -115,8 +114,10 @@ __test_page_isolated_in_pageblock(unsigned long pfn, unsigned long end_pfn)
 
 int test_pages_isolated(unsigned long start_pfn, unsigned long end_pfn)
 {
-       unsigned long pfn;
+       unsigned long pfn, flags;
        struct page *page;
+       struct zone *zone;
+       int ret;
 
        pfn = start_pfn;
        /*
@@ -132,7 +133,9 @@ int test_pages_isolated(unsigned long start_pfn, unsigned long end_pfn)
        if (pfn < end_pfn)
                return -EBUSY;
        /* Check all pages are free or Marked as ISOLATED */
-       if (__test_page_isolated_in_pageblock(start_pfn, end_pfn))
-               return 0;
-       return -EBUSY;
+       zone = page_zone(pfn_to_page(pfn));
+       spin_lock_irqsave(&zone->lock, flags);
+       ret = __test_page_isolated_in_pageblock(start_pfn, end_pfn);
+       spin_unlock_irqrestore(&zone->lock, flags);
+       return ret ? 0 : -EBUSY;
 }