md: only count actual openers as access which prevent a 'stop'

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

diff --git a/mm/migrate.c b/mm/migrate.c
index 4e0eccc..55bd355 100644 (file)
--- a/mm/migrate.c
+++ b/mm/migrate.c
@@ -9,7 +9,7 @@
  * IWAMOTO Toshihiro <iwamoto@valinux.co.jp>
  * Hirokazu Takahashi <taka@valinux.co.jp>
  * Dave Hansen <haveblue@us.ibm.com>
- * Christoph Lameter <clameter@sgi.com>
+ * Christoph Lameter
  */
 
 #include <linux/migrate.h>
@@ -383,7 +383,14 @@ static void migrate_page_copy(struct page *newpage, struct page *page)
 
        if (PageDirty(page)) {
                clear_page_dirty_for_io(page);
-               set_page_dirty(newpage);
+               /*
+                * Want to mark the page and the radix tree as dirty, and
+                * redo the accounting that clear_page_dirty_for_io undid,
+                * but we can't use set_page_dirty because that function
+                * is actually a signal that all of the page has become dirty.
+                * Wheras only part of our page may be dirty.
+                */
+               __set_page_dirty_nobuffers(newpage);
        }
 
 #ifdef CONFIG_SWAP
@@ -858,6 +865,11 @@ static int do_move_pages(struct mm_struct *mm, struct page_to_node *pm,
                        goto set_status;
 
                page = follow_page(vma, pp->addr, FOLL_GET);
+
+               err = PTR_ERR(page);
+               if (IS_ERR(page))
+                       goto set_status;
+
                err = -ENOENT;
                if (!page)
                        goto set_status;
@@ -921,6 +933,11 @@ static int do_pages_stat(struct mm_struct *mm, struct page_to_node *pm)
                        goto set_status;
 
                page = follow_page(vma, pm->addr, 0);
+
+               err = PTR_ERR(page);
+               if (IS_ERR(page))
+                       goto set_status;
+
                err = -ENOENT;
                /* Use PageReserved to check for zero page */
                if (!page || PageReserved(page))