change_bit(9)

💖 change_bit(9) 💖

okay so bestie, this is the Kernel API Manual entry for change_bit(9) — and it is literally all about toggling a bit in memory. slay. ✨

🌸 NAME 🌸

change_bit — Toggle a bit in memory 🦋

✨ SYNOPSIS ✨

void change_bit (long nr , volatile unsigned long *addr );

🎀 ARGUMENTS 🎀

• nr — Bit to change. that's the bit you're flipping, bestie 💅
• addr — Address to start counting from. yep, that's the starting point 🫶

🦋 DESCRIPTION 🦋

This is a relaxed atomic operation — no implied memory barriers, okay? so don't go assuming extra barrier energy that isn't there. periodt. 💀

Also, heads up: nr may be almost arbitrarily large; this function is not restricted to acting on a single-word quantity. it's giving flexible, not one-word-only. 🌈

👑 SEE ALSO 👑

• Kernel file ./include/asm-generic/bitops/instrumented-atomic.h — go look, iykyk 📁
• set_bit(9)
• clear_bit(9)
• test_and_set_bit(9)
• test_and_clear_bit(9)
• test_and_change_bit(9)

okay bye bestie, this page came from ./include/asm-generic/bitops and it's dated October 2026 — source/version and date noted, mwah 💋✨