fns(9)

✨ NAME ✨

okay so bestie, welcome to fns(9) from the Kernel API Manual — this page is literally about finding the N'th set bit in a word, and it's giving tiny-but-iconic. 💅

• fns - find N'th set bit in a word ✨

🌸 SYNOPSIS 🌸

here's the whole signature vibe, no cap:

unsigned int fns (unsigned long word , unsigned int n );

🎀 ARGUMENTS 🎀

• word — the word to search 🫶 like, the word we're digging through, bestie.
• n — bit to find 🔍 the specific bit we're on the hunt for.

🦋 SEE ALSO 🦋

go say hi to the whole crew, they're all iconic in their own way:

• Kernel file: ./include/linux/bitops.h
• rol64(9), ror64(9), rol32(9), ror32(9), rol16(9), ror16(9), rol8(9), ror8(9), sign_extend32(9), sign_extend64(9), get_count_order_long(9), parity8(9), __ffs64(9), assign_bit(9), __ptr_set_bit(9), __ptr_clear_bit(9), __ptr_test_bit(9)

🎀 source: ./include/linux · date: October 2026 · page: fns(9) — that's a wrap, bestie, periodt. 💖