clear_free_space_tree 2600 fs/btrfs/disk-io.c int clear_free_space_tree = 0; clear_free_space_tree 3227 fs/btrfs/disk-io.c clear_free_space_tree = 1; clear_free_space_tree 3231 fs/btrfs/disk-io.c clear_free_space_tree = 1; clear_free_space_tree 3234 fs/btrfs/disk-io.c if (clear_free_space_tree) { clear_free_space_tree 1239 fs/btrfs/free-space-tree.c ret = clear_free_space_tree(trans, free_space_root);