Merge branch 'master'

1 files changed, 7 insertions, 0 deletions

diff --git a/mm/memory.c b/mm/memory.c
index 7a11ddd5060f..2bee1f21aa8a 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -1871,6 +1871,7 @@ static int do_swap_page(struct mm_struct *mm, struct vm_area_struct *vma,
                 goto out;
 
         entry = pte_to_swp_entry(orig_pte);
+again:
         page = lookup_swap_cache(entry);
         if (!page) {
                 swapin_readahead(entry, address, vma);
@@ -1894,6 +1895,12 @@ static int do_swap_page(struct mm_struct *mm, struct vm_area_struct *vma,
 
         mark_page_accessed(page);
         lock_page(page);
+        if (!PageSwapCache(page)) {
+                /* Page migration has occured */
+                unlock_page(page);
+                page_cache_release(page);
+                goto again;
+        }
 
         /*
          * Back out if somebody else already faulted in this pte.