percpu_ref_is_zero(9)

💅 percpu_ref_is_zero(9) 💅

okay so bestie, welcome to the Kernel API Manual — this is the page for percpu_ref_is_zero(9), and it's literally about checking whether a percpu refcount has reached zero. 🫶✨

✨ NAME ✨

percpu_ref_is_zero — test whether a percpu refcount reached zero.

🛠️ SYNOPSIS 🛠️

bool percpu_ref_is_zero (struct percpu_ref *ref );

🎀 ARGUMENTS 🎀

• ref — the percpu_ref you're testing, bestie. that's the whole argument. 💅

💖 DESCRIPTION 💖

okay so real talk: this function returns true if ref reached zero. periodt. 🎯

and the safety tea ☕: this function is safe to call as long as ref is between init and exit. like, stay in that window, bestie — that's the vibe check. 🦋

🔗 SEE ALSO 🔗

• Kernel file: ./lib/percpu-refcount.c
• percpu_ref_init(9)
• percpu_ref_exit(9)
• percpu_ref_switch_to_atomic(9)
• percpu_ref_switch_to_atomic_sync(9)
• percpu_ref_switch_to_percpu(9)
• percpu_ref_kill_and_confirm(9)
• percpu_ref_reinit(9)
• percpu_ref_resurrect(9)

okay bye bestie! this page lives in ./lib, it's dated October 2026, and it's literally the percpu_ref_is_zero(9) manual page. slay! 💅✨