mark_bbt_region(9)

💅 mark_bbt_region(9) — from the Kernel API Manual, bestie

okay so this is mark_bbt_region, straight out of the kernel API manual, and it's literally the bouncer at the club door for your NAND's bad block table. 🎀

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✨ NAME ✨

mark_bbt_region — [GENERIC] mark the bad block table regions

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🦋 SYNOPSIS 🦋

void mark_bbt_region (struct nand_chip *this , struct nand_bbt_descr *td
);

no cap, that's the whole signature. two args. she's simple like that. 💅

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🌸 ARGUMENTS 🌸

• this — the NAND device 👑 (yes, the parameter is literally named this, we love a main character naming choice)
• td — bad block table descriptor, aka the little info card that tells you what this table even is 🏷️

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⭐ DESCRIPTION ⭐

okay so the bad block table regions get marked as "bad" — and the whole point of that is to prevent accidental erasures / writes. like, this is a protective vibe check for those regions, bestie, do not touch. 🚫

the regions are identified by the mark 0x02. that's the flag. that's the little signal. iykyk. 🔥

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💜 SEE ALSO 💜

kernel file ./drivers/mtd/nand/raw/nand_bbt.c — and the whole friend group of related functions, all of them, no skipping, periodt:

• check_pattern(9)
• check_short_pattern(9)
• add_marker_len(9)
• read_bbt(9)
• read_abs_bbt(9)
• scan_read_oob(9)
• read_abs_bbts(9)
• create_bbt(9)
• search_bbt(9)
• search_read_bbts(9)
• get_bbt_block(9)
• mark_bbt_block_bad(9)
• write_bbt(9)
• nand_memory_bbt(9)
• check_create(9)
• nand_update_bbt(9)
• verify_bbt_descr(9)
• nand_scan_bbt(9)
• nand_create_badblock_pattern(9)
• nand_create_bbt(9)
• nand_isreserved_bbt(9)
• nand_isbad_bbt(9)
• nand_markbad_bbt(9)

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🫶 and that's the whole page!! source/version: ./drivers/mtd/nand/raw, dated October 2026, page mark_bbt_region(9). slay, go mark those regions, and stay safe out there. 💖✨🎀