ktime_get_up..._offsets_now(9)

📦 version 7.3.1, in nixpkgs unstable

💅 ktime_get_up..._offsets_now — Kernel API Manual

okay bestie, so this is ktime_get_update_offsets_now(9) from the Kernel API Manual, and she's a lil hrtimer helper 🎀 — like, the name in the header is literally truncated with ... because it's too iconic to fit. let's get into it 💖

✨ SYNOPSIS ✨

ktime_t ktime_get_update_offsets_now (u32 *cwsseq , ktime_t *offs_real ,
ktime_t *offs_boot , ktime_t *offs_tai );

look at her 😭 four pointers, one ktime_t return, zero notes. she's booked and busy.

🫶 ARGUMENTS 🫶

  • cwsseq — pointer to check and store the clock was set sequence number. literally "clock was set seq", iykyk.
  • offs_real — pointer to storage for the monotonic -> realtime offset.
  • offs_boot — pointer to storage for the monotonic -> boottime offset.
  • offs_tai — pointer to storage for the monotonic -> clock tai offset.

four pointers, no cap. she wants to know where you're storing stuff 👑

🌸 DESCRIPTION 🌸

so what does she actually do? she returns the current monotonic time, and she updates those offsets — but only if the sequence number in cwsseq and timekeeper.clock_was_set_seq are different. like, vibe check first, updates second 💅

not me comparing sequence numbers before doing anything — she's got boundaries.

and where's she called from? hrtimer_interrupt or retrigger_next_event. so yeah, she lives in the interrupt-y part of town 🫶

🦋 SEE ALSO 🦋

the whole friend group, in the order the page gives them, no skips (we do not skip, periodt):

and the source she lives in? that's ./kernel/time/timekeeping.c 🧚

that's the whole page, bestie — every flag, every pointer, every one of those 44 see-alsos, all of it. slay ✨

signed off with love from ./kernel/time 🌈 datestamped October 2026 💜 — mwah, go read timekeeping.c 🎀

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