mod_timer_pinned — modify a timer's timeout
int mod_timer_pinned ( | struct timer_list * timer, | 
unsigned long expires); | 
   mod_timer_pinned is a way to update the expire field of an
   active timer (if the timer is inactive it will be activated)
   and not allow the timer to be migrated to a different CPU.
   
mod_timer_pinned(timer, expires) is equivalent to:
del_timer(timer); timer->expires = expires; add_timer(timer);