timespec64_add_safe(9)

📦 version 7.3.1, in nixpkgs unstable

💖 timespec64_add_safe(9) 💖

ok so this is a page from the Kernel API Manual (the 9 section, kernel-level stuff, iykyk) and bestie, we're talking about timespec64_add_safe — the function that adds two timespec64 values together and checks that nothing overflows. It's giving careful queen energy. ✨

✨ SYNOPSIS ✨

struct timespec64 timespec64_add_safe (const struct timespec64 lhs ,
       const struct timespec64 rhs );

that's it. two timespec64s in, one struct timespec64 out. slay.

🎀 ARGUMENTS 🎀

  • lhs — the first (left) timespec64 you're adding. the left one. the main character of the addition, lowkey.
  • rhs — the second (right) timespec64 you're adding. it's the right-hand side, no cap.

💅 DESCRIPTION 💅

okay so here's the vibe check: this function assumes both values are valid (>= 0). and it also assumes each timespec64 is in normalized form before it even touches them. so like. do your homework first, bestie. 🫶

it adds them and does a safety check for overflow — hence the _safe in the name. the audacity of overflow to even try 😭 not on her watch.

🌸 RETURN 🌸

the sum of lhs + rhs. that's the whole personality. 💖

🦋 SEE ALSO 🦋

it lives in the kernel file ./kernel/time/time.c — cute. and here's the whole friend group, fr fr:

that's the whole page bestie, no crumbs left 🍓 this one's filed under ./kernel/time, dated October 2026, and it's literally called timespec64_add_safe(9) — go add some timespecs, safely. 💜🧚

📦 where this page comes from