rcu_stall_c...ier_register(9)

✨ NAME ✨

okay bestie, this page is rcu_stall_c...ier_register(9) from the Kernel API Manual, and it's all about rcu_stall_chain_notifier_register — literally “Add an RCU CPU stall notifier.” 🎀

✨ SYNOPSIS ✨

int rcu_stall_chain_notifier_register (struct notifier_block *n );

✨ ARGUMENTS ✨

• n — the entry to add. 🫶

✨ DESCRIPTION ✨

So this function adds an RCU CPU stall notifier to an atomic notifier chain. The action passed to a notifier will be RCU_STALL_NOTIFY_NORM or friends. 👑 The data will be the duration of the stalled grace period, in jiffies, coerced to a void* pointer.

It returns 0 on success and -EEXIST on error. Periodt. 💅

✨ SEE ALSO ✨

• Kernel file ./kernel/rcu/tree_stall.h 🌸
• rcu_cpu_stall_reset(9)
• rcu_stall_chain_notifier_unregister(9)

signing off with 💖 from the ./kernel/rcu source/version, dated October 2026 — slay, bestie, you got this ✨