FT_BLKDEV        5940 fs/btrfs/inode.c 	BUILD_BUG_ON(BTRFS_FT_BLKDEV != FT_BLKDEV);
FT_BLKDEV          13 fs/fs_types.c  	[FT_BLKDEV]	= DT_BLK,
FT_BLKDEV          55 fs/fs_types.c  	[DT_BLK]	= FT_BLKDEV,