taglinefilesource code
ip_sjiffies349drivers/net/ppp.cppp->ddinfo.ip_sjiffies  =
ip_sjiffies1524drivers/net/ppp.ccur_ddinfo.ip_sjiffies  = cur_jiffies - ppp->ddinfo.ip_sjiffies;
ip_sjiffies1795drivers/net/ppp.cppp->ddinfo.ip_sjiffies = jiffies;
ip_sjiffies159include/linux/ppp.hunsigned long    ip_sjiffies;  /* time when last IP frame sent */