18892 struct clocksource {  struct
18893 	u64 (*read)(struct clocksource *);  argument
18904 	enum clocksource_ids id;  argument
18907 	int (*enable)(struct clocksource *);  argument
18908 	void (*disable)(struct clocksource *);  argument
18909 	void (*suspend)(struct clocksource *);  argument
18910 	void (*resume)(struct clocksource *);  argument
18911 	void (*mark_unstable)(struct clocksource *);  argument
18912 	void (*tick_stable)(struct clocksource *);  argument
18913 	struct list_head wd_list;
18914 	u64 cs_last;
18915 	u64 wd_last;
18916 	struct module *owner;