tag	line	file	source code
NBUF	21	fs/block_dev.c	#define NBUF 64
NBUF	903	fs/buffer.c	#define NBUF 16
NBUF	27	fs/ext/file.c	#define  NBUF  32
NBUF	31	fs/ext2/file.c	#define  NBUF  32
NBUF	22	fs/minix/file.c	#define  NBUF  32
NBUF	28	fs/sysv/file.c	#define  NBUF  32
NBUF	27	fs/xiafs/file.c	#define  NBUF  32