old_devices 2460 fs/btrfs/volumes.c struct btrfs_fs_devices *old_devices; old_devices 2474 fs/btrfs/volumes.c old_devices = clone_fs_devices(fs_devices); old_devices 2475 fs/btrfs/volumes.c if (IS_ERR(old_devices)) { old_devices 2477 fs/btrfs/volumes.c return PTR_ERR(old_devices); old_devices 2480 fs/btrfs/volumes.c list_add(&old_devices->fs_list, &fs_uuids);