irq_cpu_offline(9)

💅 irq_cpu_offline(9) — the kernel API manual, bestie edition ✨

okay so real talk, this page lives in the Kernel API Manual and it's about the little function that tucks your IRQs in when a CPU goes night-night. no cap, it's a short one. let's go 🫶

---

🌸 SYNOPSIS 🌸

void irq_cpu_offline (void );

that's it. that's the whole mood. ✨

---

🎀 ARGUMENTS 🎀

• void — literally no arguments. zero. none. she takes nothing and she needs nothing, main character energy fr 💅

---

💖 DESCRIPTION 💖

okay so bestie, here's the vibe: irq_cpu_offline iterates through all the irqs and invokes the chip.irq_cpu_offline for each one. every single one. like a group chat roll call but for interrupt chips 📣

that's the whole description. she's a one-liner queen and honestly? iconic. no extra lore, no secret features, no notes. periodt 👑

🔥 little heads-up: this page describes exactly what it says and nothing more. don't go inventing extra behaviour for her, she's not about that life 🙈

---

🦋 SEE ALSO 🦋

all the siblings and cousins of the irq world, in the order the page gives them (yes, all of them, we don't skip 💀):

• Kernel file ./kernel/irq/chip.c
• irq_set_chip(9)
• irq_set_irq_type(9)
• irq_set_handler_data(9)
• irq_set_msi_desc_off(9)
• irq_set_msi_desc(9)
• irq_set_chip_data(9)
• irq_disable(9)
• handle_nested_irq(9)
• handle_simple_irq(9)
• handle_untracked_irq(9)
• handle_level_irq(9)
• handle_fasteoi_irq(9)
• handle_fasteoi_nmi(9)
• handle_edge_irq(9)
• handle_percpu_irq(9)
• handle_percpu_devid_irq(9)
• irq_cpu_online(9)
• handle_fasteoi_ack_irq(9)
• handle_fasteoi_mask_irq(9)
• irq_chip_set_parent_state(9)
• irq_chip_get_parent_state(9)
• irq_chip_shutdown_parent(9)
• irq_chip_startup_parent(9)
• irq_chip_enable_parent(9)
• irq_chip_disable_parent(9)
• irq_chip_ack_parent(9)
• irq_chip_mask_parent(9)
• irq_chip_mask_ack_parent(9)
• irq_chip_unmask_parent(9)
• irq_chip_eoi_parent(9)
• irq_chip_set_affinity_parent(9)
• irq_chip_set_type_parent(9)
• irq_chip_retrigger_hierarchy(9)
• irq_chip_set_vcpu_affinity_parent(9)
• irq_chip_set_wake_parent(9)
• irq_chip_request_resources_parent(9)
• irq_chip_release_resources_parent(9)
• irq_chip_compose_msi_msg(9)
• irq_chip_pm_get(9)
• irq_chip_pm_put(9)

like, that's a whole friend group 😭 and yes, irq_cpu_online(9) is right there in the middle — they're a matching set, yin and yang, she goes to sleep and her bestie wakes up 🌈

---

and that's the page, bestie! 💜 this little blessing came from the source path ./kernel/irq, stamped October 2026, and the footer flirts with irq_cpu_offline(9) one more time on the way out. slay, stay hydrated, and may your chips always have their irq_cpu_offline ready 🍓🧚✨