... Here is a list of many of the most common supporting functions available to the device driver writer. ... Proper order (the elevator algorithm) is defined as: . ... include <linux/timer.h> . ... The timer_list structure is defined by: struct timer_list { struct timer_list *next; struct timer_list *prev; unsigned long expires; unsigned long data; void (*function)(unsigned long); }; . ... Kernel-space function to run after timeout has occured. data . ... static void end_request(int uptodate) . ...