XFS_BLFT_BITS     491 fs/xfs/libxfs/xfs_log_format.h #define XFS_BLFT_MASK	(((1 << XFS_BLFT_BITS) - 1) << XFS_BLFT_SHIFT)
XFS_BLFT_BITS     515 fs/xfs/libxfs/xfs_log_format.h 	XFS_BLFT_MAX_BUF = (1 << XFS_BLFT_BITS),