core_param_cb(9)

📦 version 7.3.1, in nixpkgs unstable

💅 core_param_cb(9) 💅

okay so before we even start — this is straight out of the Kernel API Manual, and it's about core_param_cb, which is the general callback for a module/cmdline parameter that gets evaluated before the core initcall level. bestie. that's the whole vibe. it's giving "early bird gets the parameter" 🐦✨

✨ NAME ✨

core_param_cb — the general callback for a module/cmdline parameter, and it gets evaluated before the core initcall level. no cap, it runs early. 🌸

🎀 SYNOPSIS 🎀

core_param_cb (name , ops , arg , perm );

like, that's it. that's the call. copy it exactly, i'm not joking, character for character 🫶

🦋 ARGUMENTS 🦋

  • name — a valid C identifier that's the parameter name. literally just a valid C identifier, don't get cute with it ✨
  • ops — the set & get operations for this parameter. this is where the actual doing happens 💅
  • arg — args for ops. yes that's the whole description. it's the args. for the ops. periodt.
  • perm — visibility in sysfs. that's your little window into sysfs, own it 👑

🌈 DESCRIPTION 🌈

okay so here's the tea: the ops can have NULL set or get functions. that's it. that's the description. it's short, it's iconic, it said what it said 💀

lowkey this is one of those pages where the manpage is like "i've already told you everything, why are you still reading" and honestly? valid.

🔥 SEE ALSO 🔥

bestie there are SO many siblings, it's a whole family reunion 😭 the kernel file is ./include/linux/moduleparam.h, and our relatives are:

like i said. family reunion. bring a dish 🍓

and that's the page!! mwah 💖 this lil beauty lives in ./include/linux and the version/date stamp on it is October 2026 — so yeah, mark your calendar, the future is now, slay 🌟👑✨

📦 where this page comes from