ext4: optimize orphan_list handling for ext4_setattr

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

diff --git a/mm/rmap.c b/mm/rmap.c
index 2854857..9d2ba01 100644 (file)
--- a/mm/rmap.c
+++ b/mm/rmap.c
@@ -1582,6 +1582,8 @@ void hugepage_add_anon_rmap(struct page *page,
 {
        struct anon_vma *anon_vma = vma->anon_vma;
        int first;
+
+       BUG_ON(!PageLocked(page));
        BUG_ON(!anon_vma);
        BUG_ON(address < vma->vm_start || address >= vma->vm_end);
        first = atomic_inc_and_test(&page->_mapcount);