irq_exit_rcu(9)

💅 irq_exit_rcu — the Kernel API Manual tea 🫖

okay so bestie, this is the page for irq_exit_rcu from the Kernel API Manual, and honestly? it's a short one but it's iconic. it's giving "small function, big job" energy. let's get into it ✨

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🌸 NAME 🌸

irq_exit_rcu — exit an interrupt context without updating RCU

like literally, that's the whole vibe. you're bailing out of interrupt context and RCU does not get a text back. no cap. 💅

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✨ SYNOPSIS ✨

void irq_exit_rcu (void );

that's it. that's the whole signature. gorgeous, effortless, zero notes. 🎀

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🦋 ARGUMENTS 🦋

• void — no arguments. nada. zip. she takes nothing and she needs nothing, main character energy fr fr 👑

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🔥 DESCRIPTION 🔥

so what does she actually do? okay:

Also processes softirqs if needed and possible.

that's the entire description, and honestly she ate. 💀 she also handles the softirqs when they need handling and when it's actually possible to handle them — "if needed and possible" is doing a lot of heavy lifting there, and we respect it. the way that one sentence says so much 😭

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🌈 SEE ALSO 🌈

all the besties in Kernel file ./kernel/softirq.c:

• local_bh_blocked(9)
• irq_enter_rcu(9)
• irq_enter(9)
• irq_exit(9)

go read those too, iykyk. they're all part of the same friend group 🫶

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and that's the page, bestie! stan a tiny void function that knows exactly what it is. 🌸

source/version vibes: ./kernel · date on deck: October 2026 · manual entry: irq_exit_rcu(9) — mwah, that's a wrap, periodt 💖🎀🦋