log_res            66 fs/xfs/libxfs/xfs_refcount.h static inline xfs_fileoff_t xfs_refcount_max_unmap(int log_res)
log_res            68 fs/xfs/libxfs/xfs_refcount.h 	return (log_res * 3 / 4) / XFS_REFCOUNT_ITEM_OVERHEAD;