Release page reference during page fault retry

This slipped by when unifying the filemap and swap versions of
lock_page_or_retry()...

Signed-off-by: Michel Lespinasse <walken@google.com>
Acked-by: Rik van Riel <riel@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/mm/filemap.c b/mm/filemap.c
index 75572b5f23746a4b47a42920980a22e6a5251fe7..61ba5e405791918e2bab077144300b1d4d7ab6ce 100644 (file)
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -1563,8 +1563,10 @@ retry_find:
                        goto no_cached_page;
        }
 
-       if (!lock_page_or_retry(page, vma->vm_mm, vmf->flags))
+       if (!lock_page_or_retry(page, vma->vm_mm, vmf->flags)) {
+               page_cache_release(page);
                return ret | VM_FAULT_RETRY;
+       }
 
        /* Did it get truncated? */
        if (unlikely(page->mapping != mapping)) {