get_device_..._crosststamp(9)

💖 NAME 💖

okay bestie, welcome to the get_device_..._crosststamp(9) page from the Kernel API Manual — manual name folded in right here so it's giving intro, not dusty header energy 🫶

• get_device_system_crosststamp — Synchronously capture system/device timestamp ✨

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✨ SYNOPSIS ✨

this is the exact signature, no cap 🧚

int get_device_system_crosststamp (int (*get_time_fn) (ktime_t
*device_time, struct system_counterval_t *sys_counterval, void *ctx) ,
void *ctx , struct system_time_snapshot *history_begin ,
struct system_device_crosststamp *xtstamp );

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🎀 ARGUMENTS 🎀

okay, the args, one by one 💅

• get_time_fn — Callback to get simultaneous device time and system counter from the device driver.
• ctx — Context passed to get_time_fn.
• history_begin — Historical reference point used to interpolate system time when the counter value provided by the driver is before the current interval.
• xtstamp — Receives simultaneously captured system and device time.

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🦋 DESCRIPTION 🦋

Reads a timestamp from a device and correlates it to system time. literally the whole plot 📖

Also: see documentation for ktime_get_snapshot_id for information about the raw monotonic time stamp which is used here. 👑

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🌈 SEE ALSO 🌈

Kernel file: ./kernel/time/timekeeping.c — home base 🏡

and here are all the SEE ALSO besties, every single one, because we do not skip refs in this house 💖

• struct tk_fast(9)
• tk_setup_internals(9)
• update_fast_timekeeper(9)
• ktime_get_mono_fast_ns(9)
• ktime_get_raw_fast_ns(9)
• ktime_get_boot_fast_ns(9)
• ktime_get_tai_fast_ns(9)
• ktime_get_real_fast_ns(9)
• halt_fast_timekeeper(9)
• pvclock_gtod_register_notifier(9)
• pvclock_gtod_unregister_notifier(9)
• timekeeping_forward_now(9)
• ktime_get_real_ts64(9)
• ktime_mono_to_any(9)
• ktime_get_raw(9)
• ktime_get_ts64(9)
• ktime_get_seconds(9)
• ktime_get_real_seconds(9)
• __ktime_get_real_seconds(9)
• ktime_get_snapshot_id(9)
• adjust_historical_crosststamp(9)
• ktime_real_to_base_clock(9)
• timekeeping_clocksource_has_base(9)
• do_settimeofday64(9)
• __timekeeping_inject_offset(9)
• timekeeping_notify(9)
• ktime_get_raw_ts64(9)
• timekeeping_valid_for_hres(9)
• timekeeping_max_deferment(9)
• read_persistent_clock64(9)
• read_persistent_wall_and_boot_offset(9)
• __timekeeping_inject_sleeptime(9)
• timekeeping_inject_sleeptime64(9)
• timekeeping_resume(9)
• update_wall_time(9)
• getboottime64(9)
• ktime_get_coarse_real_ts64_mg(9)
• ktime_get_real_ts64_mg(9)
• ktime_get_update_offsets_now(9)
• random_get_entropy_fallback(9)
• do_adjtimex(9)
• hardpps(9)
• ktime_get_aux(9)
• ktime_get_aux_ts64(9)

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okay that's the whole page, bestie 🫶 signing off from source ./kernel/time, dated October 2026, filed under get_device_..._crosststamp(9) and blessed by the Kernel API Manual 💅✨