Man page 9 : add_timer

add_timer - start a timer

void add_timer(struct timer_list *  timer );

timer
    the timer to be added

The kernel will do a ->function(->data) callback from the timer interrupt at the ->expires point in the future. The current time is AqjiffiesAq.

The timerAqs ->expires, ->function (and if the handler uses it, ->data) fields must be set prior calling this function.

Timers with an ->expires field in the past will be executed in the next timer tick.