ftrace_test_...rsion_unlock(9)

💅 ftrace_test_recursion_unlock — the Kernel API Manual page you didn't know you needed

okay so bestie, welcome to the Kernel API Manual ✨ this one's about ftrace_test_recursion_unlock, and honestly it's the closing-act main character of the recursion-testing duo. no cap, it's short, it's sweet, and it's literally the "and that's a wrap" of your ftrace callback 🎀

---

🌸 NAME 🌸

ftrace_test_recursion_unlock — the function you call when your callback is complete, i.e. the lil' cleanup queen that closes out the recursion test 🫶

---

✨ SYNOPSIS ✨

void ftrace_test_recursion_unlock (int bit );

that's it. one arg, one job, zero drama 💅

---

🧚 ARGUMENTS 🧚

• bit — this is the return of a successful ftrace_test_recursion_trylock. like, you got it back from the trylock, and now you hand it right back here. it's giving "you had the key, now give it back" energy 🔑

ngl bestie, "a successful" is doing a lot of heavy lifting in that sentence — it's the value from a trylock that actually succeeded, mkay? 🙈

---

🦋 DESCRIPTION 🦋

This is used at the end of a ftrace callback. that's the vibe. trylock at the start, unlock at the end, bookends, symmetrical, iconic 👑

like the way that the universe just wants your callbacks balanced?? periodt. start it with the trylock, finish it with this one, and everything stays cute and matched up 🌈

---

⭐ SEE ALSO ⭐

• Kernel file ./include/linux/trace_recursion.h — go read it, it's where the magic lives 📖
• ftrace_test_recursion_trylock(9) — the other half of the duo, the opener to this closer 🎬

---

and that's the whole page, bestie!! shipped from ./include/linux with an October 2026 stamp on it 🗓️💖 go forth and unlock your recursion tests responsibly, mwah 🧚‍♀️💜