KUNIT_DEFINE_ACTION_WRAPPER(9)

📦 version 7.3.1, in nixpkgs unstable

💅 KUNIT_DEFINE_ACTION_WRAPPER(9) — NAME 💅

Okay so bestie, welcome to the Kernel API Manual ✨ — this one's about KUNIT_DEFINE_ACTION_WRAPPER: it wraps a function for use as a deferred action. That's the whole vibe. 🎀

✨ SYNOPSIS ✨

KUNIT_DEFINE_ACTION_WRAPPER (wrapper , orig , arg_type );

🫶 ARGUMENTS 🫶

  • wrapper — the name of the new wrapper function you're defining. You're naming your little creation, main character energy, pick it cute. 👑
  • orig — the original function you want to wrap up. The og. 🦋
  • arg_type — the type of the argument that orig accepts. Gotta be honest about types, no cap. ⭐

🔥 DESCRIPTION 🔥

So here's the tea: this defines a wrapper for a function which accepts a single, pointer-sized argument. That wrapper can then be passed to kunit_add_action and similar. 💖

And listen — this should be used in preference to casting a function directly to kunit_action_t, because casting function pointers will break control flow integrity (CFI), leading to crashes. Not me warning you dramatically, it's literally right there: crashes, bestie. 😭 Don't do the cast thing. Use the wrapper. Periodt. 💀

🌈 SEE ALSO 🌈

Kernel file ./include/kunit/resource.h — plus the whole friend group, and no we are not leaving anyone out, everyone gets an invite: 🎀

Fr fr, that CFI thing is not a drill — casting function pointers directly = crashing, and crashing is not the aesthetic. 🙈

And that's the page, bestie! 🧚 This little gem lives in ./include/kunit, dated October 2026 — yeah, from the future, iconic. Mwah, go wrap something. 💅🫶💜

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