17 #include <linux/clocksource.h>
78 static u64 dummy_clock_read(struct clocksource *cs)  in dummy_clock_read()
85 static struct clocksource dummy_clock = {
93  * and shift=0. When the first proper clocksource is installed then
210  * tk_clock_read - atomic clocksource read() helper
215  * the tkr's clocksource may change between the read reference, and the
217  * the wrong clocksource is passed to the wrong read function.
224 	struct clocksource *clock = READ_ONCE(tkr->clock);  in tk_clock_read()
230  * tk_setup_internals - Set up internals to use clocksource clock.
233  * @clock:		Pointer to clocksource.
235  * Calculates a fixed cycle/nsec interval for a given clocksource/adjustment
240 static void tk_setup_internals(struct timekeeper *tk, struct clocksource *clock)  in tk_setup_internals()
244 	struct clocksource *old_clock;  in tk_setup_internals()
294 	 * active clocksource. These value will be adjusted via NTP  in tk_setup_internals()
320 		 * Handle clocksource inconsistency between CPUs to prevent  in timekeeping_cycles_to_ns()
512  * halt_fast_timekeeper - Prevent fast timekeeper from accessing clocksource.
515  * It generally is unsafe to access the clocksource after timekeeping has been
1126 	struct clocksource *cs = tk_core.timekeeper.tkr_mono.clock;  in convert_base_to_cs()
1136 	 * re-evaluating @base as the clocksource might change concurrently.  in convert_base_to_cs()
1154 	struct clocksource *cs = tk_core.timekeeper.tkr_mono.clock;  in convert_cs_to_base()
1159 	 * re-evaluating @base as the clocksource might change concurrently.  in convert_cs_to_base()
1185  * @base_id:	base clocksource id
1255 		 * Verify that the clocksource ID associated with the captured  in get_device_system_crosststamp()
1257 		 * installed timekeeper clocksource  in get_device_system_crosststamp()
1301 		 * clocksource change  in get_device_system_crosststamp()
1326  * timekeeping_clocksource_has_base - Check whether the current clocksource
1328  * @id:		base clocksource ID
1333  * Return:	true if the timekeeper clocksource has a base clock with @id,
1341 	 * clocksource might change concurrently.  in timekeeping_clocksource_has_base()
1470  * Accumulates current time interval and initializes new clocksource
1474 	struct clocksource *new = data, *old = NULL;  in change_clocksource()
1477 	 * If the clocksource is in a module, get a module reference.  in change_clocksource()
1512  * This function is called from clocksource.c after a new, better clock
1515 int timekeeping_notify(struct clocksource *clock)  in timekeeping_notify()
1571  * timekeeping_max_deferment - Returns max time the clocksource can be deferred
1637  * timekeeper clocksource is not stopping across suspend and has been
1638  * used to update sleep time. If the timekeeper clocksource has stopped
1651  * timekeeping_init - Initializes the clocksource and common timekeeping values
1657 	struct clocksource *clock;  in timekeeping_init()
1726  * 1) non-stop clocksource
1764  * and also don't have an effective nonstop clocksource.
1791 	struct clocksource *clock = tks->tkr_mono.clock;  in timekeeping_resume()
1807 	 * used: Nonstop clocksource during suspend, persistent clock and rtc  in timekeeping_resume()
1812 	 *	suspend-nonstop clocksource -> persistent clock -> rtc  in timekeeping_resume()
1853 	struct clocksource *curr_clock;  in timekeeping_suspend()
1875 	 * just read from the current clocksource. Save this to potentially  in timekeeping_suspend()
1995 		/* NTP adjustment caused clocksource mult overflow */  in timekeeping_apply_adjustment()
2048 	 * was very small.  Further, if we're slightly speeding the clocksource  in timekeeping_adjust()
2214  * update_wall_time - Uses the current clocksource to increment the wall time
2487 	struct clocksource *clock = READ_ONCE(tkr->clock);  in random_get_entropy_fallback()