tick_unfreeze(9)

💅 tick_unfreeze(9) — like, the kernel API manual manual, bestie

okay so we're in the kernel API manual section 9, and today's main character is tick_unfreeze ✨ she's the one who wakes your local tick back up after a little nap, and (maybe!!) handles timekeeping too 🎀

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✨ NAME ✨

tick_unfreeze — resume the local tick and (possibly) timekeeping 🫶

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🌸 SYNOPSIS 🌸

void tick_unfreeze (void );

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💖 ARGUMENTS 💖

• void — no arguments, bestie. literally zero. not a single one 💀✨

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🦋 DESCRIPTION 🦋

okay so here's the tea ☕ this function checks if this is the first CPU executing it, and if it is — she resumes timekeeping 👑 otherwise, she just resumes the local tick. that's it, that's the whole vibe.

🚨 real talk though: call this with interrupts disabled. no cap.

she must be balanced with tick_freeze — like, they're a matching set, you can't just leave one hanging 🙈 and interrupts must not be enabled after the preceding tick_freeze. the way that this is a hard requirement and not a suggestion 😭

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👑 SEE ALSO 👑

• kernel file ./kernel/time/tick-common.c — the house she lives in 🏠
• tick_is_oneshot_available(9)
• tick_broadcast_oneshot_control(9)
• tick_suspend_local(9)
• tick_resume_local(9)
• tick_suspend(9)
• tick_resume(9)
• tick_freeze(9) — her other half, fr fr 💜
• tick_init(9)

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and that's the page!! 💅 this whole icon is served up from the ./kernel/time corner of the kernel source, dated October 2026 — go off, tick_unfreeze(9), we love to see it 🌈⭐