BTRFS_FS_UPDATE_UUID_TREE_GEN
set_bit(BTRFS_FS_UPDATE_UUID_TREE_GEN, &fs_info->flags);
!test_bit(BTRFS_FS_UPDATE_UUID_TREE_GEN, &fs_info->flags))) {
if (test_bit(BTRFS_FS_UPDATE_UUID_TREE_GEN, &fs_info->flags))
set_bit(BTRFS_FS_UPDATE_UUID_TREE_GEN, &fs_info->flags);