linux-ext4 - [PATCH 2/4]ext4: Remove unneeded BUG_ON() in ext4_move

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Message-ID: <4A9DE3E5.8080104@rs.jp.nec.com>
Date:	Wed, 02 Sep 2009 12:17:57 +0900
From:	Akira Fujita <a-fujita@...jp.nec.com>
To:	Theodore Tso <tytso@....edu>
CC:	linux-ext4@...r.kernel.org
Subject: [PATCH 2/4]ext4: Remove unneeded BUG_ON() in ext4_move_extents()

ext4: Remove unneeded BUG_ON() in ext4_move_extents()

From: Akira Fujita <a-fujita@...jp.nec.com>

ext4_move_extents() checks with BUG_ON() whether
the exchanged blocks count accords with request blocks count.
But, if the target range (orig_start + len) includes sparse block(s),
'moved_len' (exchanged blocks count) does not accord with
'len' (request blocks count),
since sparse block is not counted in 'moved_len'.
Therefore we hit BUG_ON(), though it succeeded.

Signed-off-by: Akira Fujita <a-fujita@...jp.nec.com>
---
 fs/ext4/move_extent.c |    3 ---
 1 files changed, 0 insertions(+), 3 deletions(-)

diff --git a/fs/ext4/move_extent.c b/fs/ext4/move_extent.c
index 60ed567..643156a 100644
--- a/fs/ext4/move_extent.c
+++ b/fs/ext4/move_extent.c
@@ -1323,8 +1323,5 @@ out2:
 	if (ret)
 		return ret;

-	/* All of the specified blocks must be exchanged in succeed */
-	BUG_ON(*moved_len != len);
-
 	return 0;
 }
--
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