From 7925409e202a41176b729671eab6e610a54153cd Mon Sep 17 00:00:00 2001 From: Jan Kara Date: Wed, 16 May 2007 22:11:19 -0700 Subject: circular locking dependency found in QUOTA OFF i_mutex on quota files is special. Unlike i_mutexes for other inodes it is acquired under dqonoff_mutex. Tell lockdep about this lock ranking. Also comment and code in quota_sync_sb() seem to be bogus (as i_mutex for quota file can be acquired under dqonoff_mutex). Move truncate_inode_pages() call under dqonoff_mutex and save some problems with races... Signed-off-by: Jan Kara Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- fs/dquot.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'fs/dquot.c') diff --git a/fs/dquot.c b/fs/dquot.c index 3a995841de90..8819d281500c 100644 --- a/fs/dquot.c +++ b/fs/dquot.c @@ -1421,7 +1421,7 @@ int vfs_quota_off(struct super_block *sb, int type) /* If quota was reenabled in the meantime, we have * nothing to do */ if (!sb_has_quota_enabled(sb, cnt)) { - mutex_lock(&toputinode[cnt]->i_mutex); + mutex_lock_nested(&toputinode[cnt]->i_mutex, I_MUTEX_QUOTA); toputinode[cnt]->i_flags &= ~(S_IMMUTABLE | S_NOATIME | S_NOQUOTA); truncate_inode_pages(&toputinode[cnt]->i_data, 0); -- cgit v1.2.3-58-ga151