mark_bbt_block_bad(9)

📦 version 7.3.1, in nixpkgs unstable

💅 mark_bbt_block_bad(9) — like, the kernel API manual bestie 🎀

okay so this is mark_bbt_block_bad, and yes it lives in the Kernel API Manual (I checked, it's giving official 👑). It's a kernel function page, so there's no OPTIONS section to obsess over — just args, vibes, and a truly unhinged number of SEE ALSOs. Let's go ✨

🌸 NAME 🌸

mark_bbt_block_bad — marks one of the blocks reserved for BBT as bad 🥀 like, yes, it's as real as it sounds

⭐ SYNOPSIS ⭐

void mark_bbt_block_bad (struct nand_chip *this , struct nand_bbt_descr
*td , int chip , int block );

not me copy-pasting the signature exactly bc that's literally the whole point 💀

🦋 ARGUMENTS 🦋

  • this — the NAND device, obvs 🫶 this is your main character struct
  • td — the BBT description, iykyk 💜
  • chip — the CHIP selector, like which chip we're talking about 🔥
  • block — the BBT block to mark, the one getting the bad-block glow-down 🙈

🧚 DESCRIPTION 🧚

okay so plot twist: blocks that are reserved for BBT can still go bad 😭 and this function is the little helper that marks those blocks as bad.

it's not just a label-maker though, she does three things and honestly? iconic:

  • it takes care of updating the in-memory BBT 💖
  • it marks the block as bad using a bad block marker 🎀
  • it invalidates the associated td->pages[] entry ✨

so yeah. reserved does not mean immortal, and this is the function that handles the reality check. periodt 💅

🌈 SEE ALSO 🌈

the kernel file ./drivers/mtd/nand/raw/nand_bbt.c, plus this absolute friend group of functions — not me listing every single one, but also I have to, so here we go 🫶:

ngl, that SEE ALSO list ate and left no crumbs 🔥 every single one is staying, I don't make the rules (I do make the rules, but the rule is "keep every detail", so 💀)

and that's the page!! source situation is ./drivers/mtd/nand/raw and it's dated October 2026 — so go forth and mark those BBT blocks bad, bestie, you're literally built for this 🌸💜🦋

📦 where this page comes from