cregit-Linux how code gets into the kernel

Release 4.12 include/linux/timekeeping.h

Directory: include/linux
#ifndef _LINUX_TIMEKEEPING_H

#define _LINUX_TIMEKEEPING_H

#include <linux/errno.h>

/* Included from linux/ktime.h */

void timekeeping_init(void);
extern int timekeeping_suspended;

/* Architecture timer tick functions: */
extern void update_process_times(int user);
extern void xtime_update(unsigned long ticks);

/*
 * Get and set timeofday
 */
extern void do_gettimeofday(struct timeval *tv);
extern int do_settimeofday64(const struct timespec64 *ts);
extern int do_sys_settimeofday64(const struct timespec64 *tv,
				 const struct timezone *tz);
/*
 * Kernel time accessors
 */
unsigned long get_seconds(void);
struct timespec64 current_kernel_time64(void);
/* does not take xtime_lock */
struct timespec __current_kernel_time(void);


static inline struct timespec current_kernel_time(void) { struct timespec64 now = current_kernel_time64(); return timespec64_to_timespec(now); }

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/* * timespec based interfaces */ struct timespec64 get_monotonic_coarse64(void); extern void getrawmonotonic64(struct timespec64 *ts); extern void ktime_get_ts64(struct timespec64 *ts); extern time64_t ktime_get_seconds(void); extern time64_t ktime_get_real_seconds(void); extern int __getnstimeofday64(struct timespec64 *tv); extern void getnstimeofday64(struct timespec64 *tv); extern void getboottime64(struct timespec64 *ts); #if BITS_PER_LONG == 64 /** * Deprecated. Use do_settimeofday64(). */
static inline int do_settimeofday(const struct timespec *ts) { return do_settimeofday64(ts); }

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static inline int __getnstimeofday(struct timespec *ts) { return __getnstimeofday64(ts); }

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static inline void getnstimeofday(struct timespec *ts) { getnstimeofday64(ts); }

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Thomas Gleixner17100.00%1100.00%
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static inline void ktime_get_ts(struct timespec *ts) { ktime_get_ts64(ts); }

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Thomas Gleixner17100.00%1100.00%
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static inline void ktime_get_real_ts(struct timespec *ts) { getnstimeofday64(ts); }

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static inline void getrawmonotonic(struct timespec *ts) { getrawmonotonic64(ts); }

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static inline struct timespec get_monotonic_coarse(void) { return get_monotonic_coarse64(); }

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John Stultz14100.00%1100.00%
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static inline void getboottime(struct timespec *ts) { return getboottime64(ts); }

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#else /** * Deprecated. Use do_settimeofday64(). */
static inline int do_settimeofday(const struct timespec *ts) { struct timespec64 ts64; ts64 = timespec_to_timespec64(*ts); return do_settimeofday64(&ts64); }

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static inline int __getnstimeofday(struct timespec *ts) { struct timespec64 ts64; int ret = __getnstimeofday64(&ts64); *ts = timespec64_to_timespec(ts64); return ret; }

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Thomas Gleixner36100.00%1100.00%
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static inline void getnstimeofday(struct timespec *ts) { struct timespec64 ts64; getnstimeofday64(&ts64); *ts = timespec64_to_timespec(ts64); }

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static inline void ktime_get_ts(struct timespec *ts) { struct timespec64 ts64; ktime_get_ts64(&ts64); *ts = timespec64_to_timespec(ts64); }

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static inline void ktime_get_real_ts(struct timespec *ts) { struct timespec64 ts64; getnstimeofday64(&ts64); *ts = timespec64_to_timespec(ts64); }

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Thomas Gleixner30100.00%1100.00%
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static inline void getrawmonotonic(struct timespec *ts) { struct timespec64 ts64; getrawmonotonic64(&ts64); *ts = timespec64_to_timespec(ts64); }

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John Stultz30100.00%1100.00%
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static inline struct timespec get_monotonic_coarse(void) { return timespec64_to_timespec(get_monotonic_coarse64()); }

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John Stultz17100.00%1100.00%
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static inline void getboottime(struct timespec *ts) { struct timespec64 ts64; getboottime64(&ts64); *ts = timespec64_to_timespec(ts64); }

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Thomas Gleixner826.67%150.00%
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#endif #define ktime_get_real_ts64(ts) getnstimeofday64(ts) /* * ktime_t based interfaces */ enum tk_offsets { TK_OFFS_REAL, TK_OFFS_BOOT, TK_OFFS_TAI, TK_OFFS_MAX, }; extern ktime_t ktime_get(void); extern ktime_t ktime_get_with_offset(enum tk_offsets offs); extern ktime_t ktime_mono_to_any(ktime_t tmono, enum tk_offsets offs); extern ktime_t ktime_get_raw(void); extern u32 ktime_get_resolution_ns(void); /** * ktime_get_real - get the real (wall-) time in ktime_t format */
static inline ktime_t ktime_get_real(void) { return ktime_get_with_offset(TK_OFFS_REAL); }

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Thomas Gleixner15100.00%2100.00%
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/** * ktime_get_boottime - Returns monotonic time since boot in ktime_t format * * This is similar to CLOCK_MONTONIC/ktime_get, but also includes the * time spent in suspend. */
static inline ktime_t ktime_get_boottime(void) { return ktime_get_with_offset(TK_OFFS_BOOT); }

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Thomas Gleixner15100.00%1100.00%
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/** * ktime_get_clocktai - Returns the TAI time of day in ktime_t format */
static inline ktime_t ktime_get_clocktai(void) { return ktime_get_with_offset(TK_OFFS_TAI); }

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Thomas Gleixner15100.00%1100.00%
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/** * ktime_mono_to_real - Convert monotonic time to clock realtime */
static inline ktime_t ktime_mono_to_real(ktime_t mono) { return ktime_mono_to_any(mono, TK_OFFS_REAL); }

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static inline u64 ktime_get_ns(void) { return ktime_to_ns(ktime_get()); }

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Thomas Gleixner16100.00%1100.00%
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static inline u64 ktime_get_real_ns(void) { return ktime_to_ns(ktime_get_real()); }

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Thomas Gleixner16100.00%1100.00%
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static inline u64 ktime_get_boot_ns(void) { return ktime_to_ns(ktime_get_boottime()); }

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static inline u64 ktime_get_tai_ns(void) { return ktime_to_ns(ktime_get_clocktai()); }

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static inline u64 ktime_get_raw_ns(void) { return ktime_to_ns(ktime_get_raw()); }

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Thomas Gleixner16100.00%1100.00%
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extern u64 ktime_get_mono_fast_ns(void); extern u64 ktime_get_raw_fast_ns(void); extern u64 ktime_get_boot_fast_ns(void); /* * Timespec interfaces utilizing the ktime based ones */
static inline void get_monotonic_boottime(struct timespec *ts) { *ts = ktime_to_timespec(ktime_get_boottime()); }

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static inline void get_monotonic_boottime64(struct timespec64 *ts) { *ts = ktime_to_timespec64(ktime_get_boottime()); }

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John Stultz21100.00%1100.00%
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static inline void timekeeping_clocktai(struct timespec *ts) { *ts = ktime_to_timespec(ktime_get_clocktai()); }

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Thomas Gleixner21100.00%1100.00%
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static inline void timekeeping_clocktai64(struct timespec64 *ts) { *ts = ktime_to_timespec64(ktime_get_clocktai()); }

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Deepa Dinamani21100.00%1100.00%
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/* * RTC specific */ extern bool timekeeping_rtc_skipsuspend(void); extern bool timekeeping_rtc_skipresume(void); extern void timekeeping_inject_sleeptime64(struct timespec64 *delta); /* * PPS accessor */ extern void ktime_get_raw_and_real_ts64(struct timespec64 *ts_raw, struct timespec64 *ts_real); /* * struct system_time_snapshot - simultaneous raw/real time capture with * counter value * @cycles: Clocksource counter value to produce the system times * @real: Realtime system time * @raw: Monotonic raw system time * @clock_was_set_seq: The sequence number of clock was set events * @cs_was_changed_seq: The sequence number of clocksource change events */ struct system_time_snapshot { u64 cycles; ktime_t real; ktime_t raw; unsigned int clock_was_set_seq; u8 cs_was_changed_seq; }; /* * struct system_device_crosststamp - system/device cross-timestamp * (syncronized capture) * @device: Device time * @sys_realtime: Realtime simultaneous with device time * @sys_monoraw: Monotonic raw simultaneous with device time */ struct system_device_crosststamp { ktime_t device; ktime_t sys_realtime; ktime_t sys_monoraw; }; /* * struct system_counterval_t - system counter value with the pointer to the * corresponding clocksource * @cycles: System counter value * @cs: Clocksource corresponding to system counter value. Used by * timekeeping code to verify comparibility of two cycle values */ struct system_counterval_t { u64 cycles; struct clocksource *cs; }; /* * Get cross timestamp between system clock and device clock */ extern int get_device_system_crosststamp( int (*get_time_fn)(ktime_t *device_time, struct system_counterval_t *system_counterval, void *ctx), void *ctx, struct system_time_snapshot *history, struct system_device_crosststamp *xtstamp); /* * Simultaneously snapshot realtime and monotonic raw clocks */ extern void ktime_get_snapshot(struct system_time_snapshot *systime_snapshot); /* * Persistent clock related interfaces */ extern int persistent_clock_is_local; extern void read_persistent_clock(struct timespec *ts); extern void read_persistent_clock64(struct timespec64 *ts); extern void read_boot_clock64(struct timespec64 *ts); extern int update_persistent_clock(struct timespec now); extern int update_persistent_clock64(struct timespec64 now); #endif

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Thomas Gleixner61356.19%1334.21%
John Stultz15514.21%410.53%
Christopher S. Hall1009.17%37.89%
Xunlei Pang1009.17%615.79%
Baolin Wang292.66%25.26%
Peter Zijlstra232.11%25.26%
Deepa Dinamani211.92%12.63%
Ingo Molnar181.65%12.63%
Heena Sirwani141.28%25.26%
Joel Fernandes70.64%12.63%
Harald Geyer70.64%12.63%
Arnd Bergmann30.27%12.63%
Christoph Hellwig10.09%12.63%
Total1091100.00%38100.00%
Directory: include/linux
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