irq_cpu_online(9)

👑 NAME 👑

okay so welcome to the irq_cpu_online(9) page from the Kernel API Manual, bestie 💖

irq_cpu_online — Invoke all irq_cpu_online functions. slay.

✨ SYNOPSIS ✨

void irq_cpu_online (void );

It’s giving void in, void out, zero drama. 🎀

🎯 ARGUMENTS 🎯

• void — no arguments. literally none, bestie; this function takes nothing. 🫶

🌸 DESCRIPTION 🌸

So the way this works: it iterates through all irqs and invokes the chip.irq_cpu_online for each. That’s the whole vibe — every irq gets the call, no cap. ✨

🦋 SEE ALSO 🦋

Kernel file ./kernel/irq/chip.c, plus the whole linked-up friend group:

• 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_offline(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)

mwah 💋 — sourced from ./kernel/irq, October 2026 edition of irq_cpu_online(9). periodt. 💜