lower_gen        3390 fs/btrfs/ctree.c 	u64 lower_gen;
lower_gen        3416 fs/btrfs/ctree.c 	lower_gen = btrfs_header_generation(lower);
lower_gen        3417 fs/btrfs/ctree.c 	WARN_ON(lower_gen != trans->transid);
lower_gen        3419 fs/btrfs/ctree.c 	btrfs_set_node_ptr_generation(c, 0, lower_gen);