DIV64_U64_ROUND_UP(9)

📦 version 7.3.1, in nixpkgs unstable

💖 DIV64_U64_ROUND_UP 💖

okay so this is a page from the Kernel API Manual and it's literally about one (1) macro that does math and refuses to round down. bestie, let's get into it ✨

🌸 NAME 🌸

DIV64_U64_ROUND_UP — unsigned 64bit divide with 64bit divisor rounded up 🫶

🎀 SYNOPSIS 🎀

DIV64_U64_ROUND_UP (ll , d );

that's it. two args. no cap 💅

✨ ARGUMENTS ✨

  • ll — the unsigned 64bit dividend, aka the number getting chopped up 🍓
  • d — the unsigned 64bit divisor, aka the number doing the chopping 🔪

🦋 DESCRIPTION 🦋

so what it does is: divide the unsigned 64bit dividend by the unsigned 64bit divisor, and then round up. like, always up. it's giving "we don't do floor here" energy 👑

not me being obsessed with a macro that just refuses to lose the remainder 😭

👑 RETURN 👑

returns dividend / divisor rounded up 💖 that's the whole vibe check and it passed

🌈 SEE ALSO 🌈

oh you want the whole friend group? say less, here's the squad, all from the kernel file ./include/linux/math64.h:

go follow all of them, they're iconic 🧚

💀 lowkey a warning but honestly just a fact: this is all unsigned 64bit math, so keep your types right or the vibe check will fail and that's on periodt.

and that's the whole page, bestie 🎀 sign-off time: this came from the ./include/linux section of the Kernel API Manual, dated October 2026 — slay, go round some numbers up 💜🔥

📦 where this page comes from