xfs: remove unused deferred ops committed field

dop_committed is set when deferred item processing rolls the
transaction at least once, but is only ever accessed in tracepoints.
The transaction roll/commit events are already available via
independent tracepoints, so remove the otherwise unused field.
Signed-off-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Bill O'Donnell <billodo@redhat.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>

fs/xfs/libxfs/xfs_defer.c

@@ -249,7 +249,6 @@ xfs_defer_trans_roll(
 		xfs_defer_trans_abort(*tp, dop, error);
 		return error;
 	}
-	dop->dop_committed = true;
 
 	/* Rejoin the joined inodes. */
 	for (i = 0; i < XFS_DEFER_OPS_NR_INODES && dop->dop_inodes[i]; i++)

fs/xfs/libxfs/xfs_defer.h

@@ -49,7 +49,6 @@ enum xfs_defer_ops_type {
 #define XFS_DEFER_OPS_NR_BUFS	2	/* join up to two buffers */
 
 struct xfs_defer_ops {
-	bool			dop_committed;	/* did any trans commit? */
 	bool			dop_low;	/* alloc in low mode */
 	struct list_head	dop_intake;	/* unlogged pending work */
 	struct list_head	dop_pending;	/* logged pending work */

fs/xfs/xfs_trace.h

@@ -2229,14 +2229,12 @@ DECLARE_EVENT_CLASS(xfs_defer_class,
 	TP_fast_assign(
 		__entry->dev = mp ? mp->m_super->s_dev : 0;
 		__entry->dop = dop;
-		__entry->committed = dop->dop_committed;
 		__entry->low = dop->dop_low;
 		__entry->caller_ip = caller_ip;
 	),
-	TP_printk("dev %d:%d ops %p committed %d low %d, caller %pS",
+	TP_printk("dev %d:%d ops %p low %d, caller %pS",
 		  MAJOR(__entry->dev), MINOR(__entry->dev),
 		  __entry->dop,
-		  __entry->committed,
 		  __entry->low,
 		  (char *)__entry->caller_ip)
 )
@@ -2259,14 +2257,12 @@ DECLARE_EVENT_CLASS(xfs_defer_error_class,
 	TP_fast_assign(
 		__entry->dev = mp ? mp->m_super->s_dev : 0;
 		__entry->dop = dop;
-		__entry->committed = dop->dop_committed;
 		__entry->low = dop->dop_low;
 		__entry->error = error;
 	),
-	TP_printk("dev %d:%d ops %p committed %d low %d err %d",
+	TP_printk("dev %d:%d ops %p low %d err %d",
 		  MAJOR(__entry->dev), MINOR(__entry->dev),
 		  __entry->dop,
-		  __entry->committed,
 		  __entry->low,
 		  __entry->error)
 )