handle_simple_irq(9)

💅 handle_simple_irq(9) — the Kernel API Manual moment

okay so bestie, buckle up, because this one is lowkey the chillest handler in the whole IRQ friend group 🫶 it's from the Kernel API Manual, and it's giving "simple and software-decoded IRQs" main character energy ✨

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✨ NAME ✨

handle_simple_irq — Simple and software-decoded IRQs 💖

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🎀 SYNOPSIS 🎀

void handle_simple_irq (struct irq_desc *desc );

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🌸 ARGUMENTS 🌸

• desc — the interrupt description structure for this irq. that's it, that's the whole argument list, she's not complicated 👑

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🦋 DESCRIPTION 🦋

okay so here's the vibe: simple interrupts are either sent from a demultiplexing interrupt handler, or they come straight from hardware where, and I cannot stress this enough, no interrupt hardware control is necessary ✨ like, none. zero. the hardware said "I'm good actually" 💅

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💀 NOTE 💀

not me about to remind you of your responsibilities, but fr fr: the caller is expected to handle the ack, clear, mask and unmask issues if necessary 😭🙈 like, this function is not doing that for you, bestie. that's your era.

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🔥 SEE ALSO 🔥

the whole squad, in order, no cap 👑 — and the kernel file they live in:

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_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)
• 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)

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and that's the tea 🍓 this page is living at ./kernel/irq, stamped October 2026, and it's literally called handle_simple_irq(9) — go forth and handle those simple IRQs, you absolute icon 💜🎀✨