percpu_ref_resurrect(9)

💖 NAME 💖

Hii bestie, this is the Kernel API Manual page for percpu_ref_resurrect(9), and it's literally about bringing a percpu refcount back from the dead: modify a percpu refcount from dead to live. It's giving resurrection arc, no cap ✨

✨ SYNOPSIS ✨

void percpu_ref_resurrect (struct percpu_ref *ref );

🎀 ARGUMENTS 🎀

• ref — the perpcu_ref to resurrect. Yes bestie, that spelling is in the original, we're keeping it exactly 🫶

🦋 DESCRIPTION 🦋

Okay so what this does: modify ref so that it's in the same state as before percpu_ref_kill was called. Simple concept, iconic execution 💅

But listen: ref must be dead but must not yet have exited. That's the vibe check, and it has to pass.

Bestie, real talk: if ref->release frees ref, then the caller is responsible for guaranteeing that ref->release does not get called while this function is in progress. Do not skip that part, fr fr 😭

Also, a little note that matters: percpu_ref_tryget[_live]() are safe to perform on ref while this function is in progress. So yes, those can happen during the resurrection era 🌈

🌸 SEE ALSO 🌸

The kernel file is ./lib/percpu-refcount.c, and the whole squad is:

• 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_is_zero(9)
• percpu_ref_reinit(9)

mwah 💋 — source/version ./lib, dated October 2026, page filed under percpu_ref_resurrect(9). Catch u on the next manpage, bestie 🫶💖