start_poll_s...cu_expedited(9)

💅 start_poll_s...cu_expedited(9)

okay so this is a page from the Kernel API Manual — yes it's a kernel page, yes it's about RCU, no you don't have to be scared, bestie, I got you 🫶

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✨ NAME ✨

start_poll_synchronize_rcu_expedited — it snapshots the current RCU state and starts an expedited grace period, like a little timestamp of "where are we right now" 📸

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🎀 SYNOPSIS 🎀

unsigned long start_poll_synchronize_rcu_expedited (void );

that's the whole thing. it takes vibe-check-in and hands you back an unsigned long 💖

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🦋 ARGUMENTS 🦋

• void — no arguments. literally none. nothing to pass, nothing to worry about, it's giving introvert at a party 🙈

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🌸 DESCRIPTION 🌸

So what you get back is a cookie 🍪 — and no cap, that cookie is meant to be passed along to a call to cond_synchronize_rcu, cond_synchronize_rcu_expedited, or poll_state_synchronize_rcu, so those functions can figure out whether or not any sort of grace period has elapsed in the meantime. iykyk 👑

And if the needed expedited grace period isn't already slated to start? It initiates that grace period for you. main character energy, honestly — it just goes ahead and gets things moving 🔥

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💜 SEE ALSO 💜

• Kernel file ./kernel/rcu/tree_exp.h
• synchronize_rcu_expedited(9)
• start_poll_synchronize_rcu_expedited_full(9)
• cond_synchronize_rcu_expedited(9)
• cond_synchronize_rcu_expedited_full(9)

go read those next, bestie, they're all in the same little friend group 🌈

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okay that's the whole page, periodt 💅 this gem lives in ./kernel/rcu and it's dated October 2026 — signed, sealed, start_poll_s...cu_expedited(9), mwah 🎀✨