handle_edge_irq(9)

📦 version 7.3.1, in nixpkgs unstable

💅 handle_edge_irq(9) — bestie edition

okay so real talk, this page lives in the Kernel API Manual, section 9, and it's literally the whole scoop on handle_edge_irq. grab a strawberry drink 🍓 and let's get into it.

✨ NAME ✨

handle_edge_irq — the edge type IRQ handler. that's it, that's the vibe. 🦋

🌸 SYNOPSIS 🌸

void handle_edge_irq (struct irq_desc *desc );

🎀 ARGUMENTS 🎀

  • desc — the interrupt description structure for this irq. it's giving "the main character struct" 👑

💖 DESCRIPTION 💖

so picture this: an interrupt happens on the falling and/or rising edge of a hardware signal. very dramatic of it, honestly. 🌈

the occurrence gets latched into the irq controller hardware, and it must be acked in order to be reenabled. the way that's non-negotiable... you ack it or it stays mad at you. 😭

here's the spicy part 🔥 — after the ack, another interrupt can happen on the same source even before the first one is handled by the associated event handler. yes, they really said "why wait." 🙈

if that happens, it might be necessary to disable (mask) the interrupt, depending on the controller hardware. it's giving "depends on your hardware, iykyk."

and that requires you to reenable the interrupt inside of the loop which handles the interrupts that arrived while the handler was running. loop girlies stay winning. 💅

if all pending interrupts are handled, the loop is left. done. periodt. ✨

🔥 SEE ALSO 🔥

the kernel file on this is ./kernel/irq/chip.c — go read it bestie, it's iconic. and then the whole friend group:

ngl bestie, that SEE ALSO list is a whole group chat and every single one of them is worth a read 🫶

kisses, this page came straight out of ./kernel/irq and it's dated October 2026 — save the date, screenshot it, put it on your fridge 🧚💜

📦 where this page comes from