linux-ext4 - [patch] ext4: signedness bug breaks ext4_inode_touch_time

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Message-ID: <20130620080858.GA15095@elgon.mountain>
Date:	Thu, 20 Jun 2013 11:08:58 +0300
From:	Dan Carpenter <dan.carpenter@...cle.com>
To:	"Theodore Ts'o" <tytso@....edu>, Zheng Liu <wenqing.lz@...bao.com>
Cc:	Andreas Dilger <adilger.kernel@...ger.ca>,
	linux-ext4@...r.kernel.org, kernel-janitors@...r.kernel.org
Subject: [patch] ext4: signedness bug breaks ext4_inode_touch_time_cmp()

"diff" is unsigned so this doesn't sort the LRU list correctly.

Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>
---
This was introduced in 6480bad916be "ext4: improve extent cache shrink
mechanism to avoid to burn CPU time"

diff --git a/fs/ext4/extents_status.c b/fs/ext4/extents_status.c
index e0190f6..79e097d 100644
--- a/fs/ext4/extents_status.c
+++ b/fs/ext4/extents_status.c
@@ -880,7 +880,7 @@ static int ext4_inode_touch_time_cmp(void *priv, struct list_head *a,
 				     struct list_head *b)
 {
 	struct ext4_inode_info *eia, *eib;
-	unsigned long diff;
+	long diff;
 
 	eia = list_entry(a, struct ext4_inode_info, i_es_lru);
 	eib = list_entry(b, struct ext4_inode_info, i_es_lru);
--
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