nand_lock(9)

📦 version 7.3.1, in nixpkgs unstable

💅 nand_lock(9) — the Kernel API Manual page, but make it make sense 🎀

okay so bestie, welcome to nand_lock(9) from the Kernel API Manual (section 9, the big-kid kernel-functions section, iykyk). this is like one specific little function in the MTD/NAND universe and she's actually so simple it's almost suspicious. let's get into it 💖

✨ NAME ✨

nand_lock — the [MTD Interface] function that locks the NAND flash 🔒

that's it. that's her whole job description. lock the NAND flash. main character energy, zero notes.

🌸 SYNOPSIS 🌸

int nand_lock (struct mtd_info *mtd , loff_t ofs , uint64_t len );

look at that signature, she's giving "three params and a dream" ✨ returns an int, so yeah, check your return value, bestie, that's just good manners 🫶

🦋 ARGUMENTS 🦋

three of them, and each one has a vibe:

  • mtd — the MTD device structure 💾 this is your actual flash device, the thing you're locking. she's the whole reason we're here.
  • ofs — the offset byte address 📍 like, where in the flash you're starting from. literal byte address, no games.
  • len — the number of bytes to lock 🔐 and this one's got a rule, so listen up: it must be a multiple of block/page size. that's not a suggestion, that's the contract. if you hand it a weird number that doesn't line up, that's on you, bestie 😭
lowkey the len multiple-of-block/page-size thing is the one detail people forget, so like… don't be that person 💀

🔥 SEE ALSO 🔥

okay this section is long — she's the friend who knows literally everyone. the kernel file behind all this is ./drivers/mtd/nand/raw/nand_base.c, and here's the entire squad, no cap, not skipping a single one because every single reference matters:

and that's the whole group chat 💜 every one of them, exactly as written, no edits, no merges, periodt.

and that's the page!! honestly? iconic. nand_lock locks the NAND flash, takes an mtd, an offset ofs, and a len that's gotta be a multiple of block/page size, and returns an int. slay. 💅✨

mwah 💖 this little love letter lives in ./drivers/mtd/nand/raw and she's dated October 2026 — stay charming, stay locked, and go read your return values bestie 🎀🌈

📦 where this page comes from