arch_clear_bit(9)

📦 version 7.3.1, in nixpkgs unstable

💅 arch_clear_bit (Kernel API Manual, bestie edition) 💅

Okay so welcome to the Kernel API Manual, specifically the page for arch_clear_bit — and yes she's a real one, she lives in the arch layer and she has ✨opinions✨. Buckle up, this one's short but the vibes are immaculate.

✨ NAME ✨

arch_clear_bit — clears a bit in memory. That's it. That's the whole job. She takes one (1) bit and she makes it a zero. iconic, low-effort, high-impact 🎀

🌸 SYNOPSIS 🌸

void arch_clear_bit (int nr , volatile unsigned long *addr );

Look at her. Not a return value in sight. She does the thing and she leaves. main character energy fr 💅

🦋 ARGUMENTS 🦋

  • nr — the bit you want to clear. like, which one. the specific bit. be normal about it 🫶
  • addr — the address to start counting from. this is where the counting begins, bestie, and nr is how far you walk 🚶‍♀️

💀 NOTE 💀

big warning time, no cap — there are no guarantees that this function will not be reordered on non-x86 architectures. so if you're writing portable code, make sure not to rely on its reordering guarantees. ngl this is the kind of footnote that eats people alive in code review, so pls pls pls don't build your whole locking strategy on a vibe check 😭

Like — on x86 you might get away with something, and then you port it and it all falls apart. the way that portability will humble you 🌈

⭐ SEE ALSO ⭐

Kernel file ./arch/riscv/include/asm/bitops.h — that's the whole squad right there, go say hi:

the bitops extended universe is real and it is thriving 🧚 iykyk 💜

and that's the page!! brought to you by the source ${PWD}-core energy of ./arch/riscv/include/asm, dated October 2026 — so she's fresh, she's current, she's literally from the future-ish. go clear some bits responsibly, bestie 🍓🫶✨

📦 where this page comes from