proc_uint_u2k_conv_uop(9)

📦 version 7.3.1, in nixpkgs unstable

💅 proc_uint_u2k_conv_uop(9) — the kernel API manual, bestie edition 🎀

okay so real talk, this one lives in the Kernel API Manual and it's literally the cutest little helper: it takes a value a user typed at you and yeets it into a kernel variable. 🫶

✨ NAME ✨

proc_uint_u2k_conv_uop — assign a user value to a kernel pointer. that's it, that's the whole vibe. 💖

🌸 SYNOPSIS 🌸

int proc_uint_u2k_conv_uop (const ulong *u_ptr , uint *k_ptr , ulong
(*u_ptr_op)(const ulong) );

look at her. three args, one function pointer, zero chill. 😭

🦋 ARGUMENTS 🦋

  • u_ptr — pointer to the user space variable. like, the source of truth from userspace land 👀
  • k_ptr — pointer to the kernel variable. where the value is gonna live its best kernel life 💅
  • u_ptr_op — run this function before assigning to k_ptr. she's the pre-game, the vibe check, the "hold on lemme transform this first" step ✨

💜 DESCRIPTION 💜

so what she does is: she uses WRITE_ONCE to assign the value to k_ptr. no cap, that's the actual mechanism, WRITE_ONCE, not me being dramatic. 🔥

and if u_ptr_op is not NULL, she executes it first. icon behaviour. 👑

then — and this is the important part, bestie, do not skip this — she checks that the values are less than UINT_MAX, so you don't have to support wrap around from userspace. it's giving preventative self-care. 🧖‍♀️

⭐ RETURN ⭐

0 on success. that's the only one listed. slay. 💀

🌈 SEE ALSO 🌈

the whole friend group, fr fr:

like, the entire sysctl cinematic universe. iykyk 🍓

aaaand that's the page!! sourced from ./kernel, dated October 2026, page proc_uint_u2k_conv_uop(9) — go forth and convert your uints, bestie, mwah 💋🧚‍♀️💖

📦 where this page comes from