tag	line	file	source code
sysv_truncate	60	fs/sysv/dir.c	sysv_truncate,    /* truncate */
sysv_truncate	82	fs/sysv/file.c	sysv_truncate,    /* truncate */
sysv_truncate	100	fs/sysv/file.c	sysv_truncate,    /* truncate */
sysv_truncate	53	fs/sysv/inode.c	sysv_truncate(inode);
sysv_truncate	418	include/linux/sysv_fs.h	extern void sysv_truncate(struct inode *);