1 files changed, 6 insertions, 6 deletions

diff --git a/mm/filemap.c b/mm/filemap.c
index 1c31b2fd2ca5..768687f1d46b 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -66,7 +66,7 @@ generic_file_direct_IO(int rw, struct kiocb *iocb, const struct iovec *iov,
  *
  *  ->mmap_sem
  *    ->i_mmap_lock
- *      ->page_table_lock       (various places, mainly in mmap.c)
+ *      ->page_table_lock or pte_lock   (various, mainly in memory.c)
  *        ->mapping->tree_lock  (arch-dependent flush_dcache_mmap_lock)
  *
  *  ->mmap_sem
@@ -86,9 +86,9 @@ generic_file_direct_IO(int rw, struct kiocb *iocb, const struct iovec *iov,
  *    ->anon_vma.lock           (vma_adjust)
  *
  *  ->anon_vma.lock
- *    ->page_table_lock         (anon_vma_prepare and various)
+ *    ->page_table_lock or pte_lock     (anon_vma_prepare and various)
  *
- *  ->page_table_lock
+ *  ->page_table_lock or pte_lock
  *    ->swap_lock               (try_to_unmap_one)
  *    ->private_lock            (try_to_unmap_one)
  *    ->tree_lock               (try_to_unmap_one)
@@ -152,7 +152,7 @@ static int sync_page(void *word)
          * in the ->sync_page() methods make essential use of the
          * page_mapping(), merely passing the page down to the backing
          * device's unplug functions when it's non-NULL, which in turn
-         * ignore it for all cases but swap, where only page->private is
+         * ignore it for all cases but swap, where only page_private(page) is
          * of interest. When page_mapping() does go NULL, the entire
          * call stack gracefully ignores the page and returns.
          * -- wli
@@ -1520,7 +1520,7 @@ repeat:
                         page_cache_release(page);
                         return err;
                 }
-        } else {
+        } else if (vma->vm_flags & VM_NONLINEAR) {
                 /* No page was found just because we can't read it in now (being
                  * here implies nonblock != 0), but the page may exist, so set
                  * the PTE to fault it in later. */
@@ -1537,6 +1537,7 @@ repeat:
 
         return 0;
 }
+EXPORT_SYMBOL(filemap_populate);
 
 struct vm_operations_struct generic_file_vm_ops = {
         .nopage         = filemap_nopage,
@@ -1555,7 +1556,6 @@ int generic_file_mmap(struct file * file, struct vm_area_struct * vma)
         vma->vm_ops = &generic_file_vm_ops;
         return 0;
 }
-EXPORT_SYMBOL(filemap_populate);
 
 /*
  * This is for filesystems which do not implement ->writepage.