fix-abs-usage-in-ext4_mb_check_group_pa

   1 ext4: fix abs() usage in ext4_mb_check_group_pa
   2
   3 From: John Stultz <john.stultz@linaro.org>
   4
   5 The ext4_fsblk_t type is a long long, which should not be used
   6 with abs(), as is done in ext4_mb_check_group_pa().
   7
   8 This patch modifies ext4_mb_check_group_pa() to use abs64()
   9 instead.
  10
  11 Signed-off-by: John Stultz <john.stultz@linaro.org>
  12 Signed-off-by: Theodore Ts'o <tytso@mit.edu>
  13 ---
  14  fs/ext4/mballoc.c | 4 ++--
  15  1 file changed, 2 insertions(+), 2 deletions(-)
  16
  17 diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
  18 index 34b610e..4780ab1 100644
  19 --- a/fs/ext4/mballoc.c
  20 +++ b/fs/ext4/mballoc.c
  21 @@ -3331,8 +3331,8 @@ ext4_mb_check_group_pa(ext4_fsblk_t goal_block,
  22                 atomic_inc(&pa->pa_count);
  23                 return pa;
  24         }
  25 -       cur_distance = abs(goal_block - cpa->pa_pstart);
  26 -       new_distance = abs(goal_block - pa->pa_pstart);
  27 +       cur_distance = abs64(goal_block - cpa->pa_pstart);
  28 +       new_distance = abs64(goal_block - pa->pa_pstart);
  29
  30         if (cur_distance <= new_distance)
  31                 return cpa;