proc_ulong_k2u_conv_kop(9)

📦 version 7.3.1, in nixpkgs unstable

💅 proc_ulong_k2u_conv_kop(9) — the Kernel API Manual glow-up ✨

okay so bestie, welcome to the Kernel API Manual, entry proc_ulong_k2u_conv_kop(9). this one's a lil function that takes a kernel-side value and yeets it into a user space pointer. short page, but she's iconic in her own lowkey way 🎀

🌸 NAME 🌸

proc_ulong_k2u_conv_kop — Assign kernel value to a user space pointer 💫

like literally the whole personality: kernel value goes in, user space pointer gets assigned. periodt.

🦋 SYNOPSIS 🦋

int proc_ulong_k2u_conv_kop (ulong *u_ptr , const ulong *k_ptr , ulong
(*k_ptr_op)(const ulong) );

yes she returns an int, yes she takes three args, no we are not skipping any of them 🙈

✨ ARGUMENTS ✨

  • u_ptr — pointer to user space variable 🫶 this is the destination, the main character of the assignment
  • k_ptr — pointer to kernel variable 💜 the source, the origin story, the const queen
  • k_ptr_op — Operation applied to k_ptr before assignment 🔥 yes it's a function pointer, yes it's fancy, we love a callback

💖 DESCRIPTION 💖

so here's the vibe: it uses READ_ONCE to assign value to u_ptr. that's the whole ritual. 🕯️

and if k_ptr_op is not NULL, she executes it. if it is NULL? she simply doesn't. no cap, that's the entire behavior. 💅

🌈 RETURN 🌈

  • 0 on success. ✨ that's it, that's the only documented return. she slays, she returns zero, she leaves. 👑

🧚 SEE ALSO 🧚

the whole friend group, fr fr — go say hi:

💀 reminder bestie: this page is about assignment to user space, so keep the pointer police happy — the manual says what it says, don't go inventing extra behavior 💀

and that's the page!! sourced from ./kernel, dated October 2026 — mwah, go forth and convert those ulongs 🍓💜🫶

📦 where this page comes from