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ext2: Remove i_mutex use from ext2_quota_write() 

We don't need i_mutex in ext2_quota_write() because writes to quota file
are serialized by dqio_mutex anyway. Changes to quota files outside of quota
code are forbidded and enforced by NOATIME and IMMUTABLE bits.

Signed-off-by: Jan Kara <jack@suse.cz>
This commit is contained in:
Jan Kara 2012-04-25 21:29:42 +02:00
parent 67f1648d21
commit e2a3fde750
1 changed files with 1 additions and 5 deletions
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6
fs/ext2/super.c
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@ -1434,7 +1434,6 @@ static ssize_t ext2_quota_write(struct super_block *sb, int type,
struct buffer_head tmp_bh;
struct buffer_head *bh;
mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA);
while (towrite > 0) {
tocopy = sb->s_blocksize - offset < towrite ?
sb->s_blocksize - offset : towrite;
@ -1464,16 +1463,13 @@ static ssize_t ext2_quota_write(struct super_block *sb, int type,
blk++;
}
out:
if (len == towrite) {
mutex_unlock(&inode->i_mutex);
if (len == towrite)
return err;
}
if (inode->i_size < off+len-towrite)
i_size_write(inode, off+len-towrite);
inode->i_version++;
inode->i_mtime = inode->i_ctime = CURRENT_TIME;
mark_inode_dirty(inode);
mutex_unlock(&inode->i_mutex);
return len - towrite;
}