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[RFC,3/5] ext4: Fix abs() usage in ext4_mb_check_group_pa

Message ID 1442279124-7309-4-git-send-email-john.stultz@linaro.org
State New
Headers show

Commit Message

John Stultz Sept. 15, 2015, 1:05 a.m. UTC 
The ext4_fsblk_t type is a long long, which should not be used
with abs(), as is done in ext4_mb_check_group_pa().

This patch modifies ext4_mb_check_group_pa() to use abs64()
instead.

Cc: "Theodore Ts'o" <tytso@mit.edu>
Cc: Andreas Dilger <adilger.kernel@dilger.ca>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: linux-ext4@vger.kernel.org
Signed-off-by: John Stultz <john.stultz@linaro.org>
---
 fs/ext4/mballoc.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
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Patch

diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
index 34b610e..4780ab1 100644
--- a/fs/ext4/mballoc.c
+++ b/fs/ext4/mballoc.c
@@ -3331,8 +3331,8 @@  ext4_mb_check_group_pa(ext4_fsblk_t goal_block,
 		atomic_inc(&pa->pa_count);
 		return pa;
 	}
-	cur_distance = abs(goal_block - cpa->pa_pstart);
-	new_distance = abs(goal_block - pa->pa_pstart);
+	cur_distance = abs64(goal_block - cpa->pa_pstart);
+	new_distance = abs64(goal_block - pa->pa_pstart);
 
 	if (cur_distance <= new_distance)
 		return cpa;