FT_REG_FILE      5937 fs/btrfs/inode.c 	BUILD_BUG_ON(BTRFS_FT_REG_FILE != FT_REG_FILE);
FT_REG_FILE        10 fs/fs_types.c  	[FT_REG_FILE]	= DT_REG,
FT_REG_FILE        51 fs/fs_types.c  	[DT_REG]	= FT_REG_FILE,