DIV_U64_ROUND_CLOSEST(9)

📦 version 7.3.1, in nixpkgs unstable

✨ DIV_U64_ROUND_CLOSEST 💅

okay bestie, welcome to the Kernel API Manual 🌸 and today's main character is DIV_U64_ROUND_CLOSEST — literally the "divide a big unsigned number by a smaller unsigned number and round it nicely" girlie. no cap, she's iconic and she's about to make ur math cute 🎀

🦋 NAME

DIV_U64_ROUND_CLOSEST — unsigned 64bit divide with 32bit divisor rounded to nearest integer ✨

like... big number, small number, fancy rounding. that's the whole vibe 💖

🫶 SYNOPSIS

DIV_U64_ROUND_CLOSEST (dividend , divisor );

(yeah the spacing is a little weird, she's quirky like that, don't @ her 😭)

🍓 ARGUMENTS

  • dividend — the unsigned 64bit dividend 💜 lowkey the big one, the star of the show
  • divisor — the unsigned 32bit divisor 🦋 the smol one doing the dividing, we love her

🌈 DESCRIPTION

Divide unsigned 64bit dividend by unsigned 32bit divisor and round to closest integer.

that's it, that's the whole thing. big number ÷ smol number, but instead of just chopping the decimal off, she rounds to whichever integer is closest. it's giving "best of both worlds", it's giving "attention to detail" 👑 no truncation erasure here 💅

⭐ RETURN

dividend / divisor rounded to nearest integer 🎀

so like, the answer comes back all clean and integer-y, already rounded for u, no extra work required. slay ✨

👑 SEE ALSO

she lives in the kernel file ./include/linux/math64.h 💖 and honestly she runs with a whole squad, so go say hi to:

fr fr go read the whole squad, they're all in the same math64.h friend group 🌸

k that's the whole page bestie, hope the rounding math is giving everything u needed 💅✨

source: ./include/linux · version: October 2026 · mwah, catch u in the next manpage 🫶💖🎀

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