btrfs: Remove fs_info from btrfs_del_root

It can be referenced from the passed transaction handle.

Signed-off-by: Lu Fengqi <[e-mail]>
Signed-off-by: David Sterba <[e-mail]>

fs/btrfs/ctree.h

···
 		       u64 root_id, u64 ref_id, u64 dirid, u64 *sequence,
 		       const char *name, int name_len);
 int btrfs_del_root(struct btrfs_trans_handle *trans,
-		   struct btrfs_fs_info *fs_info, const struct btrfs_key *key);
+		   const struct btrfs_key *key);
 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
 		      const struct btrfs_key *key,
 		      struct btrfs_root_item *item);

fs/btrfs/extent-tree.c

···
 	if (err)
 		goto out_end_trans;
 
-	ret = btrfs_del_root(trans, fs_info, &root->root_key);
+	ret = btrfs_del_root(trans, &root->root_key);
 	if (ret) {
 		btrfs_abort_transaction(trans, ret);
 		err = ret;

fs/btrfs/free-space-tree.c

···
 	if (ret)
 		goto abort;
 
-	ret = btrfs_del_root(trans, fs_info, &free_space_root->root_key);
+	ret = btrfs_del_root(trans, &free_space_root->root_key);
 	if (ret)
 		goto abort;
 

fs/btrfs/qgroup.c

···
 		goto end_trans;
 	}
 
-	ret = btrfs_del_root(trans, fs_info, &quota_root->root_key);
+	ret = btrfs_del_root(trans, &quota_root->root_key);
 	if (ret) {
 		btrfs_abort_transaction(trans, ret);
 		goto end_trans;

fs/btrfs/root-tree.c

···
 
 /* drop the root item for 'key' from the tree root */
 int btrfs_del_root(struct btrfs_trans_handle *trans,
-		   struct btrfs_fs_info *fs_info, const struct btrfs_key *key)
+		   const struct btrfs_key *key)
 {
-	struct btrfs_root *root = fs_info->tree_root;
+	struct btrfs_root *root = trans->fs_info->tree_root;
 	struct btrfs_path *path;
 	int ret;