xfs: remove the debug-only q_transp field from struct xfs_dquot

The field is only used for a few assertations.  Shrink the dqout
structure instead, similarly to what commit f3ca87389d
("xfs: remove i_transp") did for the xfs_inode.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>

fs/xfs/xfs_dquot.h

@@ -34,7 +34,6 @@ typedef struct xfs_dquot {
 	uint		 dq_flags;	/* various flags (XFS_DQ_*) */
 	struct list_head q_lru;		/* global free list of dquots */
 	struct xfs_mount*q_mount;	/* filesystem this relates to */
-	struct xfs_trans*q_transp;	/* trans this belongs to currently */
 	uint		 q_nrefs;	/* # active refs from inodes */
 	xfs_daddr_t	 q_blkno;	/* blkno of dquot buffer */
 	int		 q_bufoffset;	/* off of dq in buffer (# dquots) */

fs/xfs/xfs_dquot_item.c

@@ -223,11 +223,6 @@ xfs_qm_dquot_logitem_unlock(
 
 	ASSERT(XFS_DQ_IS_LOCKED(dqp));
 
-	/*
-	 * Clear the transaction pointer in the dquot
-	 */
-	dqp->q_transp = NULL;
-
 	/*
 	 * dquots are never 'held' from getting unlocked at the end of
 	 * a transaction.  Their locking and unlocking is hidden inside the

fs/xfs/xfs_trans_dquot.c

@@ -29,7 +29,6 @@ xfs_trans_dqjoin(
 	xfs_trans_t	*tp,
 	xfs_dquot_t	*dqp)
 {
-	ASSERT(dqp->q_transp != tp);
 	ASSERT(XFS_DQ_IS_LOCKED(dqp));
 	ASSERT(dqp->q_logitem.qli_dquot == dqp);
 
@@ -37,15 +36,8 @@ xfs_trans_dqjoin(
 	 * Get a log_item_desc to point at the new item.
 	 */
 	xfs_trans_add_item(tp, &dqp->q_logitem.qli_item);
-
-	/*
-	 * Initialize d_transp so we can later determine if this dquot is
-	 * associated with this transaction.
-	 */
-	dqp->q_transp = tp;
 }
 
-
 /*
  * This is called to mark the dquot as needing
  * to be logged when the transaction is committed.  The dquot must
@@ -61,7 +53,6 @@ xfs_trans_log_dquot(
 	xfs_trans_t	*tp,
 	xfs_dquot_t	*dqp)
 {
-	ASSERT(dqp->q_transp == tp);
 	ASSERT(XFS_DQ_IS_LOCKED(dqp));
 
 	tp->t_flags |= XFS_TRANS_DIRTY;
@@ -347,7 +338,6 @@ xfs_trans_apply_dquot_deltas(
 				break;
 
 			ASSERT(XFS_DQ_IS_LOCKED(dqp));
-			ASSERT(dqp->q_transp == tp);
 
 			/*
 			 * adjust the actual number of blocks used