btrfs: replace btrfs_delayed_*_ref with btrfs_*_ref

Now that these two structs are the same, move the btrfs_data_ref and
btrfs_tree_ref up and use these in the btrfs_delayed_ref_node.  Then
remove the btrfs_delayed_*_ref structs.
Reviewed-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

fs/btrfs/delayed-ref.c

@@ -982,12 +982,10 @@ static void init_delayed_ref_common(struct btrfs_fs_info *fs_info,
 	RB_CLEAR_NODE(&ref->ref_node);
 	INIT_LIST_HEAD(&ref->add_list);
 
-	if (generic_ref->type == BTRFS_REF_DATA) {
-		ref->data_ref.objectid = generic_ref->data_ref.objectid;
-		ref->data_ref.offset = generic_ref->data_ref.offset;
-	} else {
-		ref->tree_ref.level = generic_ref->tree_ref.level;
-	}
+	if (generic_ref->type == BTRFS_REF_DATA)
+		ref->data_ref = generic_ref->data_ref;
+	else
+		ref->tree_ref = generic_ref->tree_ref;
 }
 
 void btrfs_init_tree_ref(struct btrfs_ref *generic_ref, int level, u64 mod_root,

fs/btrfs/delayed-ref.h

@@ -30,15 +30,32 @@ enum btrfs_delayed_ref_action {
 	BTRFS_UPDATE_DELAYED_HEAD,
 } __packed;
 
-struct btrfs_delayed_tree_ref {
-	int level;
-};
+struct btrfs_data_ref {
+	/* For EXTENT_DATA_REF */
 
-struct btrfs_delayed_data_ref {
+	/* Inode which refers to this data extent */
 	u64 objectid;
+
+	/*
+	 * file_offset - extent_offset
+	 *
+	 * file_offset is the key.offset of the EXTENT_DATA key.
+	 * extent_offset is btrfs_file_extent_offset() of the EXTENT_DATA data.
+	 */
 	u64 offset;
 };
 
+struct btrfs_tree_ref {
+	/*
+	 * Level of this tree block.
+	 *
+	 * Shared for skinny (TREE_BLOCK_REF) and normal tree ref.
+	 */
+	int level;
+
+	/* For non-skinny metadata, no special member needed */
+};
+
 struct btrfs_delayed_ref_node {
 	struct rb_node ref_node;
 	/*
@@ -84,8 +101,8 @@ struct btrfs_delayed_ref_node {
 	unsigned int type:8;
 
 	union {
-		struct btrfs_delayed_tree_ref tree_ref;
-		struct btrfs_delayed_data_ref data_ref;
+		struct btrfs_tree_ref tree_ref;
+		struct btrfs_data_ref data_ref;
 	};
 };
 
@@ -222,32 +239,6 @@ enum btrfs_ref_type {
 	BTRFS_REF_LAST,
 } __packed;
 
-struct btrfs_data_ref {
-	/* For EXTENT_DATA_REF */
-
-	/* Inode which refers to this data extent */
-	u64 objectid;
-
-	/*
-	 * file_offset - extent_offset
-	 *
-	 * file_offset is the key.offset of the EXTENT_DATA key.
-	 * extent_offset is btrfs_file_extent_offset() of the EXTENT_DATA data.
-	 */
-	u64 offset;
-};
-
-struct btrfs_tree_ref {
-	/*
-	 * Level of this tree block
-	 *
-	 * Shared for skinny (TREE_BLOCK_REF) and normal tree ref.
-	 */
-	int level;
-
-	/* For non-skinny metadata, no special member needed */
-};
-
 struct btrfs_ref {
 	enum btrfs_ref_type type;
 	enum btrfs_delayed_ref_action action;