hugetlb: chg cannot become less than 0

[safe/jmp/linux-2.6] / mm / rmap.c

diff --git a/mm/rmap.c b/mm/rmap.c
index ac4af8c..1652166 100644 (file)
--- a/mm/rmap.c
+++ b/mm/rmap.c
@@ -1072,7 +1072,8 @@ static int try_to_unmap_file(struct page *page, int unlock, int migration)
        spin_lock(&mapping->i_mmap_lock);
        vma_prio_tree_foreach(vma, &iter, &mapping->i_mmap, pgoff, pgoff) {
                if (MLOCK_PAGES && unlikely(unlock)) {
-                       if (!(vma->vm_flags & VM_LOCKED))
+                       if (!((vma->vm_flags & VM_LOCKED) &&
+                                               page_mapped_in_vma(page, vma)))
                                continue;       /* must visit all vmas */
                        ret = SWAP_MLOCK;
                } else {