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clocksource: add unregister function to disable unusable clocksources

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On x86 the PIT might become an unusable clocksource. Add an unregister
function to provide a possibilty to remove the PIT from the list of
available clock sources.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Thomas Gleixner 2008-01-30 13:30:02 +01:00 • committed by Ingo Molnar
commit 4713e22ce8
3 changed files with 17 additions and 0 deletions
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include/linux/clocksource.h
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@ -215,6 +215,7 @@ static inline void clocksource_calculate_interval(struct clocksource *c,
/* used to install a new clocksource */
extern int clocksource_register(struct clocksource*);
extern void clocksource_unregister(struct clocksource*);
extern struct clocksource* clocksource_get_next(void);
extern void clocksource_change_rating(struct clocksource *cs, int rating);
extern void clocksource_resume(void);