xfs: add a lock class for group/project dquots

We can have both a user and a group/project dquot locked at the same time,
as long as the user dquot is locked first.  Tell lockdep about that fact
by making the group/project dquots a different lock class.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Dave Chinner <david@fromorbit.com>
tirimbino
Christoph Hellwig 16 years ago committed by Christoph Hellwig
parent 5bb87a33b2
commit 98b8c7a0c4
  1. 12
      fs/xfs/quota/xfs_dquot.c

@ -73,6 +73,8 @@ int xfs_dqreq_num;
int xfs_dqerror_mod = 33;
#endif
static struct lock_class_key xfs_dquot_other_class;
/*
* Allocate and initialize a dquot. We don't always allocate fresh memory;
* we try to reclaim a free dquot if the number of incore dquots are above
@ -139,7 +141,15 @@ xfs_qm_dqinit(
ASSERT(dqp->q_trace);
xfs_dqtrace_entry(dqp, "DQRECLAIMED_INIT");
#endif
}
}
/*
* In either case we need to make sure group quotas have a different
* lock class than user quotas, to make sure lockdep knows we can
* locks of one of each at the same time.
*/
if (!(type & XFS_DQ_USER))
lockdep_set_class(&dqp->q_qlock, &xfs_dquot_other_class);
/*
* log item gets initialized later

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