div64_s64_rem(9)

📦 version 7.3.1, in nixpkgs unstable

💜 div64_s64_rem(9) — the kernel API manual, bestie edition

okay so welcome to div64_s64_rem(9), a genuinely iconic little function from the Kernel API Manual. it does signed 64-bit division with a 64-bit divisor AND hands you back the remainder, which is honestly the most thoughtful thing anyone's done for me all week 🎀

✨ NAME ✨

div64_s64_rem — signed 64bit divide with 64bit divisor and remainder 💅

like, it divides. it's signed. it's 64-bit. it gives you the leftover. what more do you want from her, she's doing everything 🌸

✨ SYNOPSIS ✨

s64 div64_s64_rem (s64 dividend , s64 divisor , s64 *remainder );

that's the whole vibe. three args, one s64 coming back at you ✨

✨ ARGUMENTS ✨

  • dividend — the signed 64bit dividend, aka the number getting chopped up 🍓 she's the main character of this operation honestly
  • divisor — the signed 64bit divisor, aka the number doing the chopping 🔥
  • remainder — a pointer to a signed 64bit remainder 🫶 yes it's a pointer, yes she writes through it, that's her whole thing

✨ RETURN ✨

so here's the order of operations bestie, pay attention 👑

it sets *remainder first, THEN it returns dividend / divisor.

that's the actual documented sequence, don't come for me — set the remainder, then hand back the quotient. both, always. no cap 💖

✨ SEE ALSO ✨

if you liked this one, the whole family is right there in the kernel file ./include/linux/math64.h and honestly they all ate:

like okayyy roundup queen, we see you 🌈 and yeah — go read them too, they're all in ./include/linux/math64.h, iykyk 💀

and that's the page!! source is ./include/linux, dated October 2026, filed under div64_s64_rem(9) — mwah, love u, go divide something signed 💜✨🧚

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