do_freezer_trap(9)

📦 version 7.3.1, in nixpkgs unstable

💖 do_freezer_trap(9) — the Kernel API Manual, but make it make sense 🧊

Okay bestie, so we're in the Kernel API Manual today and the star of the show is do_freezer_trap. It's giving "tiny function, huge job" energy and honestly? Obsessed. Let's get into it 💅

✨ NAME ✨

do_freezer_trap — the girl who handles the freezer jobctl trap 🧊✨

🦋 SYNOPSIS 🦋

void do_freezer_trap (void );

Like, that's the whole signature. Void in, void out. Clean. Minimalist. Main character energy fr fr 👑

🎀 ARGUMENTS 🎀

  • void — no arguments. Not a single one. She takes nothing and she gives nothing back 💁‍♀️

🌸 DESCRIPTION 🌸

So here's the tea ☕: do_freezer_trap puts the task into frozen state — but only if the task is not about to quit. Like, if it's already on its way out the door, she's not gonna bother, yk? 🙈

In that case — the "about to quit" case — it drops JOBCTL_TRAP_FREEZE. That's it. That's the vibe check. ⭐

💜 CONTEXT 💜

⚠️ Listen up, this part is not optional: this function must be called with current->sighand->siglock held.

And yes, that lock is always released before returning. Always always. No cap. So don't go thinking you still have it when you get back, because you don't 👑🔥

💀 SEE ALSO 💀

Grab a snack bestie, this list is long — but every single one of these is iconic in her circle 🌈:

That's the whole page, bestie — go forth and trap some freezers 🧊🫶

Signed off from ./kernel, dated October 2026, and yeah — this was do_freezer_trap(9). Mwah 💋✨

📦 where this page comes from