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 4.8.                 January 2017                              MOD_TIMER(9)