linux-ext4 - ext4: do not get s_umount sem on ext4_quota

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Message-ID: <87k4lro060.fsf@dmon-lap.sw.ru>
Date:	Sat, 09 Oct 2010 19:28:39 +0400
From:	Dmitry Monakhov <dmonakhov@...nvz.org>
To:	linux-ext4@...r.kernel.org
CC:	Jan Kara <jack@...e.cz>
Subject:  ext4: do not get s_umount sem on ext4_quota_off

It must be already acquired by caller. Fix lock_dep complain.

Signed-off-by: Dmitry Monakhov <dmonakhov@...il.com>

diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index e59eb37..062d1bc 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -4107,12 +4107,10 @@ static int ext4_quota_on(struct super_block *sb, int type, int format_id,
 
 static int ext4_quota_off(struct super_block *sb, int type)
 {
-	/* Force all delayed allocation blocks to be allocated */
-	if (test_opt(sb, DELALLOC)) {
-		down_read(&sb->s_umount);
+	/* Force all delayed allocation blocks to be allocated.
+	 * Caller already holds s_umount sem */
+	if (test_opt(sb, DELALLOC))
 		sync_filesystem(sb);
-		up_read(&sb->s_umount);
-	}
 
 	return dquot_quota_off(sb, type);
 }
--
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