use-swap-in-mext_page_double_lock

   1 ext4: use swap() in mext_page_double_lock()
   2
   3 From: Fabian Frederick <fabf@skynet.be>
   4
   5 Use kernel.h macro definition.
   6
   7 Thanks to Julia Lawall for Coccinelle scripting support.
   8
   9 Signed-off-by: Fabian Frederick <fabf@skynet.be>
  10 Signed-off-by: Theodore Ts'o <tytso@mit.edu>
  11 ---
  12  fs/ext4/move_extent.c | 9 +++------
  13  1 file changed, 3 insertions(+), 6 deletions(-)
  14
  15 diff --git a/fs/ext4/move_extent.c b/fs/ext4/move_extent.c
  16 index 370420b..8c04afb 100644
  17 --- a/fs/ext4/move_extent.c
  18 +++ b/fs/ext4/move_extent.c
  19 @@ -166,12 +166,9 @@ mext_page_double_lock(struct inode *inode1, struct inode *inode2,
  20          */
  21         wait_on_page_writeback(page[0]);
  22         wait_on_page_writeback(page[1]);
  23 -       if (inode1 > inode2) {
  24 -               struct page *tmp;
  25 -               tmp = page[0];
  26 -               page[0] = page[1];
  27 -               page[1] = tmp;
  28 -       }
  29 +       if (inode1 > inode2)
  30 +               swap(page[0], page[1]);
  31 +
  32         return 0;
  33  }
  34
  35 --
  36 2.4.2
  37
  38