hrtimer_sle...tart_expires(9)

💅 hrtimer_sle...tart_expires(9) — like, the whole glow-up

okay so bestie, welcome to the Kernel API Manual ✨ this one's a little function from the kernel that's giving "i'm just a wrapper but i'm doing the most." let's get into it 🎀

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✨ NAME ✨

hrtimer_sleeper_start_expires — start a hrtimer sleeper timer 🫶 that's it, that's the whole vibe.

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🌸 SYNOPSIS 🌸

void hrtimer_sleeper_start_expires (struct hrtimer_sleeper *sl , enum
hrtimer_mode mode );

look at her. iconic signature. no return value because she doesn't need to prove anything 💅

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🦋 ARGUMENTS 🦋

• sl — the sleeper that's getting started. the main character of this whole operation 👑
• mode — the timer mode, abs/rel. you know, absolute or relative. pick your timeline bestie ⏰

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💖 DESCRIPTION 💖

so here's the tea: this is a wrapper around hrtimer_start_expires for hrtimer_sleeper-based timers. why does it exist? because it lets PREEMPT_RT tweak the delivery mode (soft/hardirq context). ngl that's the entire reason. she's a little middle-man and honestly? respect. 🙈

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🔥 SEE ALSO 🔥

kernel file ./kernel/time/hrtimer.c — and the whole friend group:

• hrtimer_update_function(9)
• hrtimer_forward(9)
• hrtimer_start_range_ns(9)
• hrtimer_start_range_ns_user(9)
• hrtimer_try_to_cancel(9)
• hrtimer_cancel(9)
• __hrtimer_get_remaining(9)
• hrtimer_get_next_event(9)
• hrtimer_next_event_without(9)
• hrtimer_setup(9)
• hrtimer_setup_on_stack(9)
• hrtimer_setup_sleeper_on_stack(9)

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💀 reminder bestie: this page came out October 2026 from ./kernel/time. that's the source and the date, fr fr. don't come for me, that's just what the docs say 🌈

okay that's the whole page. go forth and start your sleepers, queen ⭐🧚💜