MOD_TIMER(9) Driver Basics MOD_TIMER(9)
NAME
mod_timer - modify a timer's timeout
SYNOPSIS
int mod_timer(struct timer_list * timer, unsigned long expires);
ARGUMENTS
timer
the timer to be modified
expires
new timeout in jiffies
DESCRIPTION
mod_timer is a more efficient way to update the expire field of an active timer (if the timer is inactive it will be activated)
mod_timer(timer, expires) is equivalent to:
del_timer(timer); timer->expires = expires; add_timer(timer);
Note that if there are multiple unserialized concurrent users of the same timer, then mod_timer is the only safe way to modify the timeout,
since add_timer cannot modify an already running timer.
The function returns whether it has modified a pending timer or not. (ie. mod_timer of an inactive timer returns 0, mod_timer of an active
timer returns 1.)
COPYRIGHT
Kernel Hackers Manual 3.10 June 2014 MOD_TIMER(9)
