USEBACKUPROOT 3309 fs/btrfs/disk-io.c btrfs_clear_opt(fs_info->mount_opt, USEBACKUPROOT); USEBACKUPROOT 3367 fs/btrfs/disk-io.c if (!btrfs_test_opt(fs_info, USEBACKUPROOT)) USEBACKUPROOT 772 fs/btrfs/super.c btrfs_set_opt(info->mount_opt, USEBACKUPROOT);