centos man page for round_jiffies_up

ROUND_JIFFIES_UP(9)						   Driver Basics					       ROUND_JIFFIES_UP(9)

NAME
       round_jiffies_up - function to round jiffies up to a full second

SYNOPSIS
       unsigned long round_jiffies_up(unsigned long j);

ARGUMENTS
       j
	   the time in (absolute) jiffies that should be rounded

DESCRIPTION
       This is the same as round_jiffies except that it will never round down. This is useful for timeouts for which the exact time of firing does
       not matter too much, as long as they don't fire too early.

COPYRIGHT
Kernel Hackers Manual 3.10					     June 2014						       ROUND_JIFFIES_UP(9)