__core_param_cb(9)

📦 version 7.3.1, in nixpkgs unstable

🌸 __core_param_cb — Kernel API Manual, but make it make sense 🌸

okay so bestie, welcome to the __core_param_cb(9) page 💅 this is the Kernel API Manual and honestly it's short but she's iconic. let's get into it 🫶

✨ NAME ✨

__core_param_cb — literally it's like core_param, except instead of a type you get set/get ops. that's the whole vibe. no cap. 🦋

✨ SYNOPSIS ✨

__core_param_cb (name , ops , arg , perm );

look at her. four args. she's simple. she's clean. she ate 🔥

✨ ARGUMENTS ✨

okay so here's what each one actually does, pay attention bestie 👑

  • name — the name of the cmdline and sysfs parameter. and yeah, it's often the same as var, but not always, so don't come for me 🙈
  • ops — the set & get operations for this parameter. this is the whole reason this function exists, honestly 🌟
  • arg — the variable itself. your actual little guy 🎀
  • perm — visibility in sysfs. it's giving "how much can you see me" energy 👀

✨ DESCRIPTION ✨

so lowkey the ideal name for this would've been core_param_cb, but plot twist: that name was already taken by the module core parameter 😭 so the kernel devs just slapped a __ prefix on the front and called it a day. iconic problem-solving honestly 💀

✨ SEE ALSO ✨

the whole friend group 🫶 go read these too, iykyk:

also these live in the Kernel file ./include/linux/moduleparam.h — that's the address, don't lose it 📍

and that's the page!! 💖✨ this little gem comes from ./include/linux and the date on it is October 2026 — so yes she's from the future and she's still slaying 👑💅 bye bestie, go parameter-ize responsibly 🦋🌸

📦 where this page comes from