XFS_ILOCK_PARENT_VAL  371 fs/xfs/xfs_inode.h #define XFS_ILOCK_MAX_SUBCLASS		(XFS_ILOCK_PARENT_VAL - 1)
XFS_ILOCK_PARENT_VAL  375 fs/xfs/xfs_inode.h #define	XFS_ILOCK_PARENT		(XFS_ILOCK_PARENT_VAL << XFS_ILOCK_SHIFT)