rcu_read_unlock(9)

📦 version 7.3.1, in nixpkgs unstable

hey bestie, welcome to rcu_read_unlock(9) from the Kernel API Manual 💅✨ this one is short but it matters, okay?

💖 NAME 💖

this is the function that marks the end of an RCU read-side critical section. literally the “ok we’re done here” of RCU read-side critical sections 🫶

✨ SYNOPSIS ✨

the signature is giving:

void rcu_read_unlock (void );

🎀 ARGUMENTS 🎀

  • void — no arguments. not a single one, bestie 💀

🌸 DESCRIPTION 🌸

okay so in almost all situations, rcu_read_unlock is immune from deadlock — yes, deadlock immunity, like it’s just not catching that vibe. that deadlock immunity also extends to the scheduler's runqueue and priority-inheritance spinlocks, courtesy of the quiescent-state deferral that is carried out when rcu_read_unlock is invoked with interrupts disabled. iykyk, that’s the little detail doing the work 🧚✨

for more information, see rcu_read_lock — the matching bestie 🫶

🦋 SEE ALSO 🦋

the kernel file is ./include/linux/rcupdate.h, and here's the whole SEE ALSO squad, no cap:

and that’s the page! 💖 source/version ./include/linux, date October 2026, and the footer is giving rcu_read_unlock(9) — mwah 💋

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