1 files changed, 17 insertions, 0 deletions

diff --git a/mm/memory.c b/mm/memory.c
index 7a11ddd5060f..9abc6008544b 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -82,6 +82,16 @@ EXPORT_SYMBOL(num_physpages);
 EXPORT_SYMBOL(high_memory);
 EXPORT_SYMBOL(vmalloc_earlyreserve);
 
+int randomize_va_space __read_mostly = 1;
+
+static int __init disable_randmaps(char *s)
+{
+        randomize_va_space = 0;
+        return 0;
+}
+__setup("norandmaps", disable_randmaps);
+
+
 /*
  * If a p?d_bad entry is found while walking page tables, report
  * the error, before resetting entry to p?d_none.  Usually (but
@@ -1871,6 +1881,7 @@ 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 +1905,12 @@ 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.