mm: set VM_FAULT_WRITE in do_swap_page()

Set the flag if do_swap_page is decowing the page the same way do_wp_page
would too.

Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Rik van Riel <riel@redhat.com>
Cc: Nick Piggin <nickpiggin@yahoo.com.au>
Cc: Hugh Dickins <hughd@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 1 insertions, 0 deletions

diff --git a/mm/memory.c b/mm/memory.c
index 6bc039486e9f..1ecca56e0a48 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -2723,6 +2723,7 @@ static int do_swap_page(struct mm_struct *mm, struct vm_area_struct *vma,
         if ((flags & FAULT_FLAG_WRITE) && reuse_swap_page(page)) {
                 pte = maybe_mkwrite(pte_mkdirty(pte), vma);
                 flags &= ~FAULT_FLAG_WRITE;
+                ret |= VM_FAULT_WRITE;
                 exclusive = 1;
         }
         flush_icache_page(vma, page);