irq_chip_startup_parent(9)

💖 irq_chip_startup_parent(9) 💖

okay so bestie, this is the Kernel API Manual page for irq_chip_startup_parent(9) — yes, the whole startup-the-parent-interrupt situation. lowkey iconic kernel plumbing, fr fr. let's get into it 🫶

✨ NAME ✨

irq_chip_startup_parent — Startup the parent interrupt. no cap, that's the name and the mission 💅

🌸 SYNOPSIS 🌸

unsigned int irq_chip_startup_parent (struct irq_data *data );

the way that signature just sits there being all official 😌✨

🎀 ARGUMENTS 🎀

• data — pointer to interrupt specific data. literally the interrupt's little info package, and yes you need it 📦

🦋 DESCRIPTION 🦋

So here's the vibe: it invokes the irq_startup callback of the parent if available, or it falls back to irq_chip_enable_parent. that's it, that's the whole flex. if it's available, irq_startup gets the moment; otherwise the fallback is irq_chip_enable_parent. periodt. ✨

bestie this is giving "try the main-character callback first, then use the backup plan" energy, and honestly? valid 💅

🔥 SEE ALSO 🔥

Kernel file ./kernel/irq/chip.c and the whole reference squad, no cap:

• 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)
• 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_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 💋 that's the tea from source/version ./kernel/irq, dated October 2026, on the irq_chip_startup_parent(9) page. go be a kernel main character 🌈👑