diff options
author | Thomas Gleixner <tglx@linutronix.de> | 2015-03-25 13:07:37 +0100 |
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committer | Ingo Molnar <mingo@kernel.org> | 2015-04-01 14:22:58 +0200 |
commit | c1797baf6880174f899ce3960d0598f5bbeeb7ff (patch) | |
tree | c854e772dd2d01a998d732ce04dc0a4f748e458a /include/linux/tick.h | |
parent | b7475eb599ddb2e8cab2dc86ff38a9507463ad6b (diff) | |
download | op-kernel-dev-c1797baf6880174f899ce3960d0598f5bbeeb7ff.zip op-kernel-dev-c1797baf6880174f899ce3960d0598f5bbeeb7ff.tar.gz |
tick: Move core only declarations and functions to core
No point to expose everything to the world. People just believe
such functions can be abused for whatever purposes. Sigh.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
[ Rebased on top of 4.0-rc5 ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Cc: Nicolas Pitre <nico@linaro.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/28017337.VbCUc39Gme@vostro.rjw.lan
[ Merged to latest timers/core ]
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'include/linux/tick.h')
-rw-r--r-- | include/linux/tick.h | 134 |
1 files changed, 18 insertions, 116 deletions
diff --git a/include/linux/tick.h b/include/linux/tick.h index 9c085dc..f9a2d26 100644 --- a/include/linux/tick.h +++ b/include/linux/tick.h @@ -1,7 +1,5 @@ -/* linux/include/linux/tick.h - * - * This file contains the structure definitions for tick related functions - * +/* + * Tick related global functions */ #ifndef _LINUX_TICK_H #define _LINUX_TICK_H @@ -9,13 +7,12 @@ #include <linux/clockchips.h> #include <linux/irqflags.h> #include <linux/percpu.h> -#include <linux/hrtimer.h> #include <linux/context_tracking_state.h> #include <linux/cpumask.h> #include <linux/sched.h> +/* ARM BL switcher abuse support */ #ifdef CONFIG_GENERIC_CLOCKEVENTS - enum tick_device_mode { TICKDEV_MODE_PERIODIC, TICKDEV_MODE_ONESHOT, @@ -25,133 +22,38 @@ struct tick_device { struct clock_event_device *evtdev; enum tick_device_mode mode; }; - -enum tick_nohz_mode { - NOHZ_MODE_INACTIVE, - NOHZ_MODE_LOWRES, - NOHZ_MODE_HIGHRES, -}; - -/** - * struct tick_sched - sched tick emulation and no idle tick control/stats - * @sched_timer: hrtimer to schedule the periodic tick in high - * resolution mode - * @last_tick: Store the last tick expiry time when the tick - * timer is modified for nohz sleeps. This is necessary - * to resume the tick timer operation in the timeline - * when the CPU returns from nohz sleep. - * @tick_stopped: Indicator that the idle tick has been stopped - * @idle_jiffies: jiffies at the entry to idle for idle time accounting - * @idle_calls: Total number of idle calls - * @idle_sleeps: Number of idle calls, where the sched tick was stopped - * @idle_entrytime: Time when the idle call was entered - * @idle_waketime: Time when the idle was interrupted - * @idle_exittime: Time when the idle state was left - * @idle_sleeptime: Sum of the time slept in idle with sched tick stopped - * @iowait_sleeptime: Sum of the time slept in idle with sched tick stopped, with IO outstanding - * @sleep_length: Duration of the current idle sleep - * @do_timer_lst: CPU was the last one doing do_timer before going idle - */ -struct tick_sched { - struct hrtimer sched_timer; - unsigned long check_clocks; - enum tick_nohz_mode nohz_mode; - ktime_t last_tick; - int inidle; - int tick_stopped; - unsigned long idle_jiffies; - unsigned long idle_calls; - unsigned long idle_sleeps; - int idle_active; - ktime_t idle_entrytime; - ktime_t idle_waketime; - ktime_t idle_exittime; - ktime_t idle_sleeptime; - ktime_t iowait_sleeptime; - ktime_t sleep_length; - unsigned long last_jiffies; - unsigned long next_jiffies; - ktime_t idle_expires; - int do_timer_last; -}; - -extern void __init tick_init(void); -extern int tick_is_oneshot_available(void); extern struct tick_device *tick_get_device(int cpu); +#endif +#ifdef CONFIG_GENERIC_CLOCKEVENTS +extern void __init tick_init(void); extern void tick_freeze(void); extern void tick_unfreeze(void); +#else /* CONFIG_GENERIC_CLOCKEVENTS */ +static inline void tick_init(void) { } +static inline void tick_freeze(void) { } +static inline void tick_unfreeze(void) { } +#endif /* !CONFIG_GENERIC_CLOCKEVENTS */ -# ifdef CONFIG_HIGH_RES_TIMERS -extern int tick_init_highres(void); -extern int tick_program_event(ktime_t expires, int force); -extern void tick_setup_sched_timer(void); -# endif - -# if defined CONFIG_NO_HZ_COMMON || defined CONFIG_HIGH_RES_TIMERS -extern void tick_cancel_sched_timer(int cpu); -# else -static inline void tick_cancel_sched_timer(int cpu) { } -# endif - -# ifdef CONFIG_GENERIC_CLOCKEVENTS_BROADCAST -extern struct tick_device *tick_get_broadcast_device(void); -extern struct cpumask *tick_get_broadcast_mask(void); - -# ifdef CONFIG_TICK_ONESHOT -extern struct cpumask *tick_get_broadcast_oneshot_mask(void); -# endif - -# endif /* BROADCAST */ - -# ifdef CONFIG_TICK_ONESHOT -extern void tick_clock_notify(void); -extern int tick_check_oneshot_change(int allow_nohz); -extern struct tick_sched *tick_get_tick_sched(int cpu); +#ifdef CONFIG_TICK_ONESHOT extern void tick_irq_enter(void); -extern int tick_oneshot_mode_active(void); # ifndef arch_needs_cpu # define arch_needs_cpu() (0) # endif # else -static inline void tick_clock_notify(void) { } -static inline int tick_check_oneshot_change(int allow_nohz) { return 0; } -static inline void tick_irq_enter(void) { } -static inline int tick_oneshot_mode_active(void) { return 0; } -# endif - -#else /* CONFIG_GENERIC_CLOCKEVENTS */ -static inline void tick_init(void) { } -static inline void tick_freeze(void) { } -static inline void tick_unfreeze(void) { } -static inline void tick_cancel_sched_timer(int cpu) { } -static inline void tick_clock_notify(void) { } -static inline int tick_check_oneshot_change(int allow_nohz) { return 0; } static inline void tick_irq_enter(void) { } -static inline int tick_oneshot_mode_active(void) { return 0; } -#endif /* !CONFIG_GENERIC_CLOCKEVENTS */ - -# ifdef CONFIG_NO_HZ_COMMON -DECLARE_PER_CPU(struct tick_sched, tick_cpu_sched); - -static inline int tick_nohz_tick_stopped(void) -{ - return __this_cpu_read(tick_cpu_sched.tick_stopped); -} +#endif +#ifdef CONFIG_NO_HZ_COMMON +extern int tick_nohz_tick_stopped(void); extern void tick_nohz_idle_enter(void); extern void tick_nohz_idle_exit(void); extern void tick_nohz_irq_exit(void); extern ktime_t tick_nohz_get_sleep_length(void); extern u64 get_cpu_idle_time_us(int cpu, u64 *last_update_time); extern u64 get_cpu_iowait_time_us(int cpu, u64 *last_update_time); - -# else /* !CONFIG_NO_HZ_COMMON */ -static inline int tick_nohz_tick_stopped(void) -{ - return 0; -} - +#else /* !CONFIG_NO_HZ_COMMON */ +static inline int tick_nohz_tick_stopped(void) { return 0; } static inline void tick_nohz_idle_enter(void) { } static inline void tick_nohz_idle_exit(void) { } @@ -163,7 +65,7 @@ static inline ktime_t tick_nohz_get_sleep_length(void) } static inline u64 get_cpu_idle_time_us(int cpu, u64 *unused) { return -1; } static inline u64 get_cpu_iowait_time_us(int cpu, u64 *unused) { return -1; } -# endif /* !CONFIG_NO_HZ_COMMON */ +#endif /* !CONFIG_NO_HZ_COMMON */ #ifdef CONFIG_NO_HZ_FULL extern bool tick_nohz_full_running; |