_test_bit(9)

🎀 _test_bit(9) 🎀

okay bestie, welcome to the Kernel API Manual entry for _test_bit(9) — she’s here, she’s iconic, and she has one very specific job 💅✨

💖 NAME 💖

_test_bit — determine whether a bit is set, periodt 🫶

✨ SYNOPSIS ✨

bool _test_bit (unsigned long nr , const volatile unsigned long *addr );

🦋 ARGUMENTS 🦋

• nr — bit number to test 🔍 like, which bit are we checking, bestie?
• addr — Address to start counting from 📍 the starting point for the counting vibes.

🌈 SEE ALSO 🌈

• Kernel file: ./tools/include/asm-generic/bitops/non-atomic.h 📁✨
• ___set_bit(9)
• ___change_bit(9)
• ___test_and_set_bit(9)
• ___test_and_clear_bit(9)

these are the linked besties, iykyk 💜

mwah 💋 — footer tea time: source/version is ./tools/include/asm-generic/bi..., dated October 2026, and yeah, _test_bit(9) is living in that footer too. bye bestie 🎀🫶