xfs_freecounter_unavailable
xfs_freecounter_unavailable(mp, ctr);
xfs_freecounter_unavailable(mp, XC_FREE_BLOCKS),
xfs_freecounter_unavailable(mp, ctr),
uint64_t xfs_freecounter_unavailable(struct xfs_mount *mp,
fdblocks - xfs_freecounter_unavailable(mp, XC_FREE_BLOCKS));