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authorThomas Gleixner <tglx@linutronix.de>2015-03-25 13:07:37 +0100
committerIngo Molnar <mingo@kernel.org>2015-04-01 14:22:58 +0200
commitc1797baf6880174f899ce3960d0598f5bbeeb7ff (patch)
treec854e772dd2d01a998d732ce04dc0a4f748e458a /include/linux/tick.h
parentb7475eb599ddb2e8cab2dc86ff38a9507463ad6b (diff)
downloadop-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.h134
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;
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