382 	struct btrfs_trans_handle *h;  in start_transaction()  local
397 		h = current->journal_info;  in start_transaction()
398 		h->use_count++;  in start_transaction()
399 		WARN_ON(h->use_count > 2);  in start_transaction()
400 		h->orig_rsv = h->block_rsv;  in start_transaction()
401 		h->block_rsv = NULL;  in start_transaction()
434 	h = kmem_cache_alloc(btrfs_trans_handle_cachep, GFP_NOFS);  in start_transaction()
435 	if (!h) {  in start_transaction()
473 	h->transid = cur_trans->transid;  in start_transaction()
474 	h->transaction = cur_trans;  in start_transaction()
475 	h->bytes_reserved = 0;  in start_transaction()
476 	h->root = root;  in start_transaction()
477 	h->delayed_ref_updates = 0;  in start_transaction()
478 	h->use_count = 1;  in start_transaction()
479 	h->adding_csums = 0;  in start_transaction()
480 	h->block_rsv = NULL;  in start_transaction()
481 	h->orig_rsv = NULL;  in start_transaction()
482 	h->aborted = 0;  in start_transaction()
483 	h->qgroup_reserved = 0;  in start_transaction()
484 	h->delayed_ref_elem.seq = 0;  in start_transaction()
485 	h->type = type;  in start_transaction()
486 	h->allocating_chunk = false;  in start_transaction()
487 	h->reloc_reserved = false;  in start_transaction()
488 	h->sync = false;  in start_transaction()
489 	INIT_LIST_HEAD(&h->qgroup_ref_list);  in start_transaction()
490 	INIT_LIST_HEAD(&h->new_bgs);  in start_transaction()
491 	INIT_LIST_HEAD(&h->ordered);  in start_transaction()
496 		current->journal_info = h;  in start_transaction()
497 		btrfs_commit_transaction(h, root);  in start_transaction()
503 					      h->transid, num_bytes, 1);  in start_transaction()
504 		h->block_rsv = &root->fs_info->trans_block_rsv;  in start_transaction()
505 		h->bytes_reserved = num_bytes;  in start_transaction()
506 		h->reloc_reserved = reloc_reserved;  in start_transaction()
508 	h->qgroup_reserved = qgroup_reserved;  in start_transaction()
511 	btrfs_record_root_in_trans(h, root);  in start_transaction()
514 		current->journal_info = h;  in start_transaction()
515 	return h;  in start_transaction()
520 	kmem_cache_free(btrfs_trans_handle_cachep, h);  in start_transaction()