luck/tmp_suning_uos_patched
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Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-quota-2.6

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* 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-quota-2.6:
  quota: Fix possible deadlock during parallel quotaon and quotaoff
This commit is contained in:
Linus Torvalds 2009-07-08 09:35:50 -07:00
commit 728b690fd5
1 changed files with 2 additions and 2 deletions
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4
fs/quota/dquot.c
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@ -2042,8 +2042,8 @@ static int vfs_load_quota_inode(struct inode *inode, int type, int format_id,
* changes */
invalidate_bdev(sb->s_bdev);
}
mutex_lock(&inode->i_mutex);
mutex_lock(&dqopt->dqonoff_mutex);
mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA);
if (sb_has_quota_loaded(sb, type)) {
error = -EBUSY;
goto out_lock;
@ -2094,7 +2094,6 @@ static int vfs_load_quota_inode(struct inode *inode, int type, int format_id,
dqopt->files[type] = NULL;
iput(inode);
out_lock:
mutex_unlock(&dqopt->dqonoff_mutex);
if (oldflags != -1) {
down_write(&dqopt->dqptr_sem);
/* Set the flags back (in the case of accidental quotaon()
@ -2104,6 +2103,7 @@ static int vfs_load_quota_inode(struct inode *inode, int type, int format_id,
up_write(&dqopt->dqptr_sem);
}
mutex_unlock(&inode->i_mutex);
mutex_unlock(&dqopt->dqonoff_mutex);
out_fmt:
put_quota_format(fmt);