nand_extract_bits(9)

📦 version 7.3.1, in nixpkgs unstable

💅 nand_extract_bits(9) — Kernel API Manual, but make it make sense

okay so bestie, welcome to the Kernel API Manual page for nand_extract_bits, and honestly? she's a tiny little baddie with one job and she does it flawlessly. no notes. let's get into it 🎀

✨ NAME ✨

nand_extract_bits — literally copies unaligned bits from one buffer to another one. that's it. that's the whole personality. and yet, iconic. 💖

🌸 SYNOPSIS 🌸

void nand_extract_bits (u8 *dst , unsigned int dst_off , const u8 *src ,
unsigned int src_off , unsigned int nbits );

like look at her. five arguments. zero drama. we stan a signature that fits on two lines. 🦋

🫶 ARGUMENTS 🫶

  • dst — the destination buffer, aka where the bits are going. the glow-up location. ✨
  • dst_off — the bit offset at which the writing starts. not byte offset, bestie, bit offset. iykyk. 💅
  • src — the source buffer, aka where the bits are coming from. the origin story. 💜
  • src_off — the bit offset at which the reading starts. again. bits. not bytes. do not come for me. 🙈
  • nbits — number of bits to copy from src to dst. yes, she counts in bits. she's built different. 👑

🌈 DESCRIPTION 🌈

so the whole gig is: copy bits from one memory region to another. that's it. that's the function.

and the slay detail? overlap authorized 🔥 — meaning the two regions are allowed to overlap and this is fine and legal and not a crime. no cap, it's giving "i got you, don't worry about the buffer boundaries." main character energy honestly. 🌟

👑 SEE ALSO 👑

the whole nand cinematic universe, and yes we're listing every single one because nobody gets left out on my watch 💖

Kernel file ./drivers/mtd/nand/raw/nand_base.c, and also:

bestie reminder 🫶 this is a bit-level copy, so dst_off and src_off are measured in bits, and overlapping regions are fully authorized. no cap. go off. 💅

kisses and bye-bye from ./drivers/mtd/nand/raw 💖 — page stamped October 2026, manual name nand_extract_bits(9), and that's the whole footer babyyyy 🎀✨🌸

📦 where this page comes from