init_srcu_struct_fast(9)

✨ init_srcu_struct_fast(9) ✨

ok so real talk, this is a page from the Kernel API Manual and it's literally all about getting your SRCU struct ready before you do anything else with it. bestie, do not skip this step, i'm begging 🙏

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🌸 NAME 🌸

init_srcu_struct_fast — the glow-up ritual that initializes a fast-reader sleep-RCU structure 💅

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🎀 SYNOPSIS 🎀

int init_srcu_struct_fast (struct srcu_struct *ssp );

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🦋 ARGUMENTS 🦋

• ssp — the structure you're initializing. that's her. that's the one getting the makeover ✨

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💖 DESCRIPTION 💖

okay so picture this: you've got a srcu_struct that's not static, and you can't use DEFINE_SRCU_FAST or DEFINE_STATIC_SRCU_FAST on it — those are for the static girlies. so instead, you call this function. it's the substitute. it's giving "we have DEFINE at home" but make it valid 🫶

this is the one you reach for when your structure is headed to srcu_read_lock_fast and friends. iykyk ✨

no cap, this one is mandatory: you have to invoke init_srcu_struct_fast on a given srcu_struct before you pass that srcu_struct to any other function. literally any. do not pass go. do not collect $200. 🚫

and honestly the cutest part? each srcu_struct represents its own separate domain of SRCU protection 👑 like each one is living its own main character life, fully independent, no sharing, no overlap, periodt.

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🧚 SEE ALSO 🧚

• the kernel file ./kernel/rcu/srcutree.c (the lore, the origin story 📖)
• init_srcu_struct_generic(9)
• init_srcu_struct_fast_updown(9)
• cleanup_srcu_struct(9)
• call_srcu(9)
• synchronize_srcu_expedited(9)
• synchronize_srcu(9)
• get_state_synchronize_srcu(9)
• start_poll_synchronize_srcu(9)
• poll_state_synchronize_srcu(9)
• srcu_barrier(9)
• srcu_expedite_current(9)
• srcu_batches_completed(9)

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and that's the whole page, bestie! 🎀 shipped straight outta ./kernel/rcu, dated October 2026 — the Kernel API Manual version, no cap. go initialize something iconic 💜✨