xfs: pass the defer ops directly to xfs_defer_add

Pass a pointer to the xfs_defer_op_type structure to xfs_defer_add and
remove the indirection through the xfs_defer_ops_type enum and a global
table of all possible operations.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: "Darrick J. Wong" <djwong@kernel.org>
Signed-off-by: Chandan Babu R <chandanbabu@kernel.org>

fs/xfs/libxfs/xfs_alloc.c

@@ -2514,7 +2514,7 @@ xfs_defer_agfl_block(
 	trace_xfs_agfl_free_defer(mp, agno, 0, agbno, 1);
 
 	xfs_extent_free_get_group(mp, xefi);
-	xfs_defer_add(tp, XFS_DEFER_OPS_TYPE_AGFL_FREE, &xefi->xefi_list);
+	xfs_defer_add(tp, &xefi->xefi_list, &xfs_agfl_free_defer_type);
 	return 0;
 }
 
@@ -2578,7 +2578,7 @@ xfs_defer_extent_free(
 			XFS_FSB_TO_AGBNO(tp->t_mountp, bno), len);
 
 	xfs_extent_free_get_group(mp, xefi);
-	*dfpp = xfs_defer_add(tp, XFS_DEFER_OPS_TYPE_FREE, &xefi->xefi_list);
+	*dfpp = xfs_defer_add(tp, &xefi->xefi_list, &xfs_extent_free_defer_type);
 	return 0;
 }
 

fs/xfs/libxfs/xfs_attr.c

@@ -906,7 +906,7 @@ xfs_attr_defer_add(
 		ASSERT(0);
 	}
 
-	xfs_defer_add(args->trans, XFS_DEFER_OPS_TYPE_ATTR, &new->xattri_list);
+	xfs_defer_add(args->trans, &new->xattri_list, &xfs_attr_defer_type);
 	trace_xfs_attr_defer_add(new->xattri_dela_state, args->dp);
 }
 

fs/xfs/libxfs/xfs_bmap.c

@@ -6091,7 +6091,7 @@ __xfs_bmap_add(
 	bi->bi_bmap = *bmap;
 
 	xfs_bmap_update_get_group(tp->t_mountp, bi);
-	xfs_defer_add(tp, XFS_DEFER_OPS_TYPE_BMAP, &bi->bi_list);
+	xfs_defer_add(tp, &bi->bi_list, &xfs_bmap_update_defer_type);
 	return 0;
 }
 

fs/xfs/libxfs/xfs_defer.c

@@ -235,16 +235,6 @@ static const struct xfs_defer_op_type xfs_barrier_defer_type = {
 	.cancel_item	= xfs_defer_barrier_cancel_item,
 };
 
-static const struct xfs_defer_op_type *defer_op_types[] = {
-	[XFS_DEFER_OPS_TYPE_BMAP]	= &xfs_bmap_update_defer_type,
-	[XFS_DEFER_OPS_TYPE_REFCOUNT]	= &xfs_refcount_update_defer_type,
-	[XFS_DEFER_OPS_TYPE_RMAP]	= &xfs_rmap_update_defer_type,
-	[XFS_DEFER_OPS_TYPE_FREE]	= &xfs_extent_free_defer_type,
-	[XFS_DEFER_OPS_TYPE_AGFL_FREE]	= &xfs_agfl_free_defer_type,
-	[XFS_DEFER_OPS_TYPE_ATTR]	= &xfs_attr_defer_type,
-	[XFS_DEFER_OPS_TYPE_BARRIER]	= &xfs_barrier_defer_type,
-};
-
 /* Create a log intent done item for a log intent item. */
 static inline void
 xfs_defer_create_done(
@@ -847,14 +837,12 @@ xfs_defer_alloc(
 struct xfs_defer_pending *
 xfs_defer_add(
 	struct xfs_trans		*tp,
-	enum xfs_defer_ops_type		type,
-	struct list_head		*li)
+	struct list_head		*li,
+	const struct xfs_defer_op_type	*ops)
 {
 	struct xfs_defer_pending	*dfp = NULL;
-	const struct xfs_defer_op_type	*ops = defer_op_types[type];
 
 	ASSERT(tp->t_flags & XFS_TRANS_PERM_LOG_RES);
-	BUILD_BUG_ON(ARRAY_SIZE(defer_op_types) != XFS_DEFER_OPS_TYPE_MAX);
 
 	dfp = xfs_defer_find_last(tp, ops);
 	if (!dfp || !xfs_defer_can_append(dfp, ops))

fs/xfs/libxfs/xfs_defer.h

@@ -10,20 +10,6 @@ struct xfs_btree_cur;
 struct xfs_defer_op_type;
 struct xfs_defer_capture;
 
-/*
- * Header for deferred operation list.
- */
-enum xfs_defer_ops_type {
-	XFS_DEFER_OPS_TYPE_BMAP,
-	XFS_DEFER_OPS_TYPE_REFCOUNT,
-	XFS_DEFER_OPS_TYPE_RMAP,
-	XFS_DEFER_OPS_TYPE_FREE,
-	XFS_DEFER_OPS_TYPE_AGFL_FREE,
-	XFS_DEFER_OPS_TYPE_ATTR,
-	XFS_DEFER_OPS_TYPE_BARRIER,
-	XFS_DEFER_OPS_TYPE_MAX,
-};
-
 /*
  * Save a log intent item and a list of extents, so that we can replay
  * whatever action had to happen to the extent list and file the log done
@@ -51,8 +37,8 @@ struct xfs_defer_pending {
 void xfs_defer_item_pause(struct xfs_trans *tp, struct xfs_defer_pending *dfp);
 void xfs_defer_item_unpause(struct xfs_trans *tp, struct xfs_defer_pending *dfp);
 
-struct xfs_defer_pending *xfs_defer_add(struct xfs_trans *tp,
-		enum xfs_defer_ops_type type, struct list_head *h);
+struct xfs_defer_pending *xfs_defer_add(struct xfs_trans *tp, struct list_head *h,
+		const struct xfs_defer_op_type *ops);
 int xfs_defer_finish_noroll(struct xfs_trans **tp);
 int xfs_defer_finish(struct xfs_trans **tp);
 int xfs_defer_finish_one(struct xfs_trans *tp, struct xfs_defer_pending *dfp);

fs/xfs/libxfs/xfs_refcount.c

@@ -1458,7 +1458,7 @@ __xfs_refcount_add(
 	ri->ri_blockcount = blockcount;
 
 	xfs_refcount_update_get_group(tp->t_mountp, ri);
-	xfs_defer_add(tp, XFS_DEFER_OPS_TYPE_REFCOUNT, &ri->ri_list);
+	xfs_defer_add(tp, &ri->ri_list, &xfs_refcount_update_defer_type);
 }
 
 /*

fs/xfs/libxfs/xfs_rmap.c

@@ -2567,7 +2567,7 @@ __xfs_rmap_add(
 	ri->ri_bmap = *bmap;
 
 	xfs_rmap_update_get_group(tp->t_mountp, ri);
-	xfs_defer_add(tp, XFS_DEFER_OPS_TYPE_RMAP, &ri->ri_list);
+	xfs_defer_add(tp, &ri->ri_list, &xfs_rmap_update_defer_type);
 }
 
 /* Map an extent into a file. */